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University of Georgia
1.
Hamburg, Joshua Dean.
Pearl millet and ghrelin in poulty.
Degree: 2014, University of Georgia
URL: http://hdl.handle.net/10724/28749
► Poultry production allows the efficient production of animal protein in the form of meat and eggs. In developing countries where affordable animal protein sources for…
(more)
▼ Poultry production allows the efficient production of animal protein in the form of meat and eggs. In developing countries where affordable animal protein sources for human consumption are deficient, the consumer price of poultry products
and the expansion of the commercial poultry industry are negatively impacted by the utilization of costly imported feed ingredients to make poultry diets. Identifying and utilizing locally grown feed ingredients would be beneficial in these locations.
Pearl millet is a drought resistant plant that produces a nutritious grain. Its cultivation in present day Mali spans thousands of years. It is still widely cultivated in this country where poultry production is limited. The nutrient composition of
different varieties of pearl millet grown in Mali was assessed and then experiments were completed which indicated that whole pearl millet grain grown in this region is a suitable substitute for corn in broiler and laying hens diets.
Subjects/Keywords: pearl millet; broilers; laying hens
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APA (6th Edition):
Hamburg, J. D. (2014). Pearl millet and ghrelin in poulty. (Thesis). University of Georgia. Retrieved from http://hdl.handle.net/10724/28749
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Hamburg, Joshua Dean. “Pearl millet and ghrelin in poulty.” 2014. Thesis, University of Georgia. Accessed April 18, 2021.
http://hdl.handle.net/10724/28749.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Hamburg, Joshua Dean. “Pearl millet and ghrelin in poulty.” 2014. Web. 18 Apr 2021.
Vancouver:
Hamburg JD. Pearl millet and ghrelin in poulty. [Internet] [Thesis]. University of Georgia; 2014. [cited 2021 Apr 18].
Available from: http://hdl.handle.net/10724/28749.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Hamburg JD. Pearl millet and ghrelin in poulty. [Thesis]. University of Georgia; 2014. Available from: http://hdl.handle.net/10724/28749
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University
2.
Dunkley, Claudia Sharene.
High fiber low energy diet for molt induction in laying hens: the impact of alfalfa on physiology, immunology and behavior.
Degree: PhD, Poultry Science, 2009, Texas A&M University
URL: http://hdl.handle.net/1969.1/ETD-TAMU-1186
► Feed withdrawal is commonly used by commercial egg producers to induce molt and stimulate multiple egg-laying cycles in their flocks. However, the practice can compromise…
(more)
▼ Feed withdrawal is commonly used by commercial egg producers to induce molt and stimulate multiple egg-
laying cycles in their flocks. However, the practice can compromise the welfare of the birds by elevating stress, suppressing the immune response and causing abnormal behavior. An alternate molt diet was examined using alfalfa diets, and a series of experiments were conducted to evaluate the physiological, immunological and behavioral responses of
laying hens fed these diets. We assessed the changes in the levels of blood plasma metabolites after
hens were challenged with 106 colony forming units of Salmonella Enteritidis (SE).
Hens fed alfalfa diets displayed similar (P ≥ 0.05) levels of cholesterol, glucose, and total protein when compared to full-fed
hens. Reduced levels (P ≤ 0.05) of triglycerides were observed in the alfalfa fed and feed withdrawal
hens when compared to the full-fed
hens. The immune responses of SE challenged
laying hens fed alfalfa diets showed similar (P ≥ 0.05) heterophil to lymphocyte ratios (H: L) to full-fed
hens whereas the feed withdrawal
hens displayed elevated (P ≤ 0.05) H: L ratios. The feed withdrawal
hens displayed reduced (P ≤ 0.05) levels of serum IgY early in the trial when compared to the alfalfa and full-fed
hens. The alfalfa fed
hens displayed lower levels of acid α glycol protein than the feed withdrawal
hens and higher levels than the full-fed early during the trial but returned to levels that were similar (P ≥ 0.05) to the full-fed
hens. The
hens fed alfalfa diets displayed elevated non-nutritive pecking behavior early in the trial however, this behavior declined to levels similar (P ≥ 0.05) to the full-fed
hens by the end of the trial. No differences in aggressive behavior were observed between the alfalfa fed
hens and the full-fed
hens. Hafnium chloride did not effectively mark the alfalfa diet; however, it can be used to track the passage of corn-soy layer ration. This research suggests that the application of alfalfa as an alternative molt diet can be effective in reducing potentially harmful effects which are usually associated with feed withdrawal.
Advisors/Committee Members: Berghman, Luc R. (advisor), Ricke, Steven C. (advisor), Friend, Ted H. (committee member), Kubena, Leon F. (committee member), McReynolds, Jackson, L. (committee member).
Subjects/Keywords: Molting; Laying hens
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Dunkley, C. S. (2009). High fiber low energy diet for molt induction in laying hens: the impact of alfalfa on physiology, immunology and behavior. (Doctoral Dissertation). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-1186
Chicago Manual of Style (16th Edition):
Dunkley, Claudia Sharene. “High fiber low energy diet for molt induction in laying hens: the impact of alfalfa on physiology, immunology and behavior.” 2009. Doctoral Dissertation, Texas A&M University. Accessed April 18, 2021.
http://hdl.handle.net/1969.1/ETD-TAMU-1186.
MLA Handbook (7th Edition):
Dunkley, Claudia Sharene. “High fiber low energy diet for molt induction in laying hens: the impact of alfalfa on physiology, immunology and behavior.” 2009. Web. 18 Apr 2021.
Vancouver:
Dunkley CS. High fiber low energy diet for molt induction in laying hens: the impact of alfalfa on physiology, immunology and behavior. [Internet] [Doctoral dissertation]. Texas A&M University; 2009. [cited 2021 Apr 18].
Available from: http://hdl.handle.net/1969.1/ETD-TAMU-1186.
Council of Science Editors:
Dunkley CS. High fiber low energy diet for molt induction in laying hens: the impact of alfalfa on physiology, immunology and behavior. [Doctoral Dissertation]. Texas A&M University; 2009. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-1186

North Carolina State University
3.
Fosnaught, Mary Helen.
Mediating Bone Mineralization Status in Laying Hens by Feeding Increased Calcium during Rearing and the Lay Cycle.
Degree: PhD, Nutrition, 2009, North Carolina State University
URL: http://www.lib.ncsu.edu/resolver/1840.16/4505
► Trends to decrease the age of sexual maturity and point of lay without concurrent increases in dietary Ca may reduce the potential for full skeletal…
(more)
▼ Trends to decrease the age of sexual maturity and point of lay without concurrent increases in dietary Ca may reduce the potential for full skeletal mineralization in pullets. During lay, the hen’s increased genetic capacity to produce more eggs with less feed without respective increases in dietary Ca may further predispose
hens to bone weakness leading to welfare and livability issues. Objectives of this research were to evaluate the effect of feeding increased calcium during rearing and the lay cycle as well as strain and density on
laying hen performance and bone mineralization status. Pullets were grown to 16 wks in a grow house with 52 pullets/replicate and 28 replicates/treatment (5,824hens total) which were then moved to a lay house from 18-66 wks with either 24 or 36
hens/replicate (at 48 or 64 sq in) so that there was a total of 26 replicates/treatment (5,728
hens total). The 2 x 2 factorial arrangement of treatments during rearing were Leghorns strain: Hy-Line W-36 (H) and Babcock B-300 (B) and Ca:P ratios: elevated (RC+) Ca:P 2.14, 3.14, 4.14 and control (RC) Ca:P 2.14, 2.14, 2.42 ratio of starter (0-6 weeks), grower (6-12 weeks), and developer (12-17 weeks), respectively. In the lay cycle, the 2 x 2 x 2 x 2 factorial consisted of strain, rearing diet, layer dietary regimens: increasing Ca and P (LC+) and constant (LC) and cage densities: low, 64in2/bird (LD) and high, 48in2/bird (HD). All diets were isocaloric and fed ad libitum. Feed consumption (FC) and BW were monitored bi-weekly (by period) beginning at 2 weeks of age during the rearing and every 4 weeks during the layer phase. Mortality and egg production was recorded daily. During rearing, 5 femurs/trt and during
laying, 3 femurs/trt were measured for dry fat-extracted bone weight (DFEW), % ash, volume, and bone breaking strength (BBS) from week 6-16 and from weeks 51-61, respectively. From week 0-17, FC was higher (P≤0.01) when feeding RC+ (5.11 kg) than RC (4.81 kg) otherwise there was no effect on Gain (1,017 and 1,029 g, respectively, P=0.53) or FE (0.199 and 0.214, respectively, P=0.08). Strain had no effect on FC, Gain, or FE. Mortality increased (P≤0.03) by period in the B compared to H strain. Layer performance was not affected by feeding the increased calcium during rearing or lay. Strain effected (P≤0.05) feed consumption, feed efficiency, egg production, and mortality. Feeding more Ca during rearing increased DFEW (RC+=0.94 g vs. RC=0.82 g, P=0.04) while strain effected bone volume (H=2.99 and B=2.37 cc, P≤0.01) and femoral BBS (B=8.55 vs. H=7.80 kg, P=0.01) of pullets. Feeding more Ca during lay did not effect bone status, but feeding it during rearing increased BBS (RC+=14.15 vs. RC=12.37 kg, P≤0.01) in older layers. Strain effected (P≤0.001) both BBS (H=14.26 vs. B=12.26 kg) and volume (H=5.90 vs. B=6.27 cc). These findings indicate that feeding increased Ca during rearing and
laying impacts bone mineralization and may be a useful strategy to mitigate bone weakness and…
Advisors/Committee Members: Donna Carver, Committee Member (advisor), Jesse Grimes, Committee Member (advisor), James Petitte, Committee Member (advisor), Ken Anderson, Committee Chair (advisor).
Subjects/Keywords: pullets; bone strength; calcium; laying hens
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Fosnaught, M. H. (2009). Mediating Bone Mineralization Status in Laying Hens by Feeding Increased Calcium during Rearing and the Lay Cycle. (Doctoral Dissertation). North Carolina State University. Retrieved from http://www.lib.ncsu.edu/resolver/1840.16/4505
Chicago Manual of Style (16th Edition):
Fosnaught, Mary Helen. “Mediating Bone Mineralization Status in Laying Hens by Feeding Increased Calcium during Rearing and the Lay Cycle.” 2009. Doctoral Dissertation, North Carolina State University. Accessed April 18, 2021.
http://www.lib.ncsu.edu/resolver/1840.16/4505.
MLA Handbook (7th Edition):
Fosnaught, Mary Helen. “Mediating Bone Mineralization Status in Laying Hens by Feeding Increased Calcium during Rearing and the Lay Cycle.” 2009. Web. 18 Apr 2021.
Vancouver:
Fosnaught MH. Mediating Bone Mineralization Status in Laying Hens by Feeding Increased Calcium during Rearing and the Lay Cycle. [Internet] [Doctoral dissertation]. North Carolina State University; 2009. [cited 2021 Apr 18].
Available from: http://www.lib.ncsu.edu/resolver/1840.16/4505.
Council of Science Editors:
Fosnaught MH. Mediating Bone Mineralization Status in Laying Hens by Feeding Increased Calcium during Rearing and the Lay Cycle. [Doctoral Dissertation]. North Carolina State University; 2009. Available from: http://www.lib.ncsu.edu/resolver/1840.16/4505

University of Guelph
4.
Baxter, Mikayla.
Studying the Effect of Light Wavelength on Laying Hens (Gallus gallus).
Degree: MS, Department of Animal and Poultry Science, 2015, University of Guelph
URL: https://atrium.lib.uoguelph.ca/xmlui/handle/10214/8744
► In poultry, higher wavelengths of light are more effective at stimulating extra-retinal photoreceptors, increasing reproduction. In practice, multiple light sources are used in layer barns,…
(more)
▼ In poultry, higher wavelengths of light are more effective at stimulating extra-retinal photoreceptors, increasing reproduction. In practice, multiple light sources are used in layer barns, each emitting different light spectra. This study aimed to design a novel LED bulb and evaluate the effect of light wavelength on egg production. Our initial results in non-commercial
laying hens, found that red light is critical to stimulate the reproductive response, therefore we designed a LED bulb emitting 60% red light (LED-R). This bulb was able to effectively stimulate the reproductive axis in commercial
laying hens without negatively affecting egg production, egg quality or stress in birds maintained either in cages or on floor pens. When exposed to light from the LED-R, feed consumption and body growth was reduced, without affecting cumulative number of eggs. As well, the LED-R bulbs consumed less electricity thus reducing cost of production.
Advisors/Committee Members: Bedecarrats, Gregoy (advisor).
Subjects/Keywords: Light wavelength; LED; Laying Hens; egg production
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Baxter, M. (2015). Studying the Effect of Light Wavelength on Laying Hens (Gallus gallus). (Masters Thesis). University of Guelph. Retrieved from https://atrium.lib.uoguelph.ca/xmlui/handle/10214/8744
Chicago Manual of Style (16th Edition):
Baxter, Mikayla. “Studying the Effect of Light Wavelength on Laying Hens (Gallus gallus).” 2015. Masters Thesis, University of Guelph. Accessed April 18, 2021.
https://atrium.lib.uoguelph.ca/xmlui/handle/10214/8744.
MLA Handbook (7th Edition):
Baxter, Mikayla. “Studying the Effect of Light Wavelength on Laying Hens (Gallus gallus).” 2015. Web. 18 Apr 2021.
Vancouver:
Baxter M. Studying the Effect of Light Wavelength on Laying Hens (Gallus gallus). [Internet] [Masters thesis]. University of Guelph; 2015. [cited 2021 Apr 18].
Available from: https://atrium.lib.uoguelph.ca/xmlui/handle/10214/8744.
Council of Science Editors:
Baxter M. Studying the Effect of Light Wavelength on Laying Hens (Gallus gallus). [Masters Thesis]. University of Guelph; 2015. Available from: https://atrium.lib.uoguelph.ca/xmlui/handle/10214/8744

Louisiana State University
5.
Rubio Zapata, Nancy Katherine.
Effect of Increasing Levels of Dietary Zinc (Zn), Manganese (Mn), and Copper (Cu) from Organic and Inorganic Sources on Egg Quality and Egg Zn, Mn, and Cu Content in Laying Hens.
Degree: MS, Animal Sciences, 2016, Louisiana State University
URL: etd-06302016-144023
;
https://digitalcommons.lsu.edu/gradschool_theses/1424
► Feeding laying hens or broiler breeder hens organic sources of trace minerals can improve egg quality, especially as related to shell quality. The objectives of…
(more)
▼ Feeding laying hens or broiler breeder hens organic sources of trace minerals can improve egg quality, especially as related to shell quality. The objectives of this research were to evaluate the effect of increasing laying hen dietary zinc (Zn) levels on the content of Zn and other minerals in eggs (boron (Bo), iron (Fe), and calcium (Ca)), and to evaluate the effect of feeding increasing Zn, manganese (Mn) and copper (Cu) levels from inorganic (ITM) and organic (OTM) sources on egg quality and yolk content of Zn, Mn, and Cu. In the first experiment, a total of 64 (48 weeks of age) commercial hens (Hy-Line W-36) were allotted to one of four treatments diets on day 0. There were four replicates with four hens per replicate. The dietary treatments were: 1) corn-soybean meal (C-SBM) with no added Zn (25 mg/kg total Zn from feeding ingredients), 2) C-SBM with 50 mg/kg added Zn, 3) C-SBM with 100 mg/kg added Zn, and 4) C-SBM with 150 added mg/kg Zn. The inorganic source of Zn was ZnSO4. The trial lasted 30 days. In the second trial, 600 Hy-Line W-36 hens at 26 weeks of age were used. Hens were allotted to one of five treatment diets on day 0 of the trial. A total of 10 replicates with 12 hens per replicate were used. The dietary treatments were: 1) Control - no supplementation of Zn, Mn, or Cu, 2) Zn, Mn, and Cu supplemented at 80-90-8 mg/kg from ITM, 3) Zn, Mn, and Cu supplemented at 80-90-8 mg/kg from ITM+OTM, 4) Zn, Mn, and Cu supplemented at 160-175-16 mg/kg from ITM, and 5) Zn, Mn, and Cu supplemented at 160-175-16 mg/kg from ITM+OTM. The trial lasted 84 days. The response criteria were egg weight, specific gravity, egg shell thickness, egg shell weight, albumen height, yolk height and width, Haugh units, yolk index, feed intake and feed conversion. Data were collected on three consecutive days at the end of each 28 day period. On the second day of each three day collection period, three yolks per replicate were collected and stored for analysis of Zn, Mn, and Cu content. In the first experiment, hens fed more than 100 mg/kg added Zn had reduced egg production and egg mass. Zinc content in the egg yolk was increased 23% with 150 mg/kg added Zn. In the second experiment there was no effect (P>0.05) of dietary treatment on egg production. During the first 28 day collection period, yolk Zn and Mn were highest (P<0.01) for hens fed the 160-175-16 mg/kg from ITM+OTM. In the third 28 day collection period, albumen height was highest (P<0.05) in eggs laid by hens fed the control diet and similar for hens fed all other treatment diets. Egg weight and egg mass were not affected by increasing dietary inclusion of Zn, Mn, and Cu. Feed intake was improved for the first 28 day collection period. Egg/kg of feed was increased when hens were fed the 80-90-8 mg/kg from ITM+OTM. Thus, Zn content of the egg yolk may be increased by the inclusion of ITM+OTM at rates above their requirement in layer diets.
Subjects/Keywords: egg quality; laying hens; manganese; zinc; copper
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Rubio Zapata, N. K. (2016). Effect of Increasing Levels of Dietary Zinc (Zn), Manganese (Mn), and Copper (Cu) from Organic and Inorganic Sources on Egg Quality and Egg Zn, Mn, and Cu Content in Laying Hens. (Masters Thesis). Louisiana State University. Retrieved from etd-06302016-144023 ; https://digitalcommons.lsu.edu/gradschool_theses/1424
Chicago Manual of Style (16th Edition):
Rubio Zapata, Nancy Katherine. “Effect of Increasing Levels of Dietary Zinc (Zn), Manganese (Mn), and Copper (Cu) from Organic and Inorganic Sources on Egg Quality and Egg Zn, Mn, and Cu Content in Laying Hens.” 2016. Masters Thesis, Louisiana State University. Accessed April 18, 2021.
etd-06302016-144023 ; https://digitalcommons.lsu.edu/gradschool_theses/1424.
MLA Handbook (7th Edition):
Rubio Zapata, Nancy Katherine. “Effect of Increasing Levels of Dietary Zinc (Zn), Manganese (Mn), and Copper (Cu) from Organic and Inorganic Sources on Egg Quality and Egg Zn, Mn, and Cu Content in Laying Hens.” 2016. Web. 18 Apr 2021.
Vancouver:
Rubio Zapata NK. Effect of Increasing Levels of Dietary Zinc (Zn), Manganese (Mn), and Copper (Cu) from Organic and Inorganic Sources on Egg Quality and Egg Zn, Mn, and Cu Content in Laying Hens. [Internet] [Masters thesis]. Louisiana State University; 2016. [cited 2021 Apr 18].
Available from: etd-06302016-144023 ; https://digitalcommons.lsu.edu/gradschool_theses/1424.
Council of Science Editors:
Rubio Zapata NK. Effect of Increasing Levels of Dietary Zinc (Zn), Manganese (Mn), and Copper (Cu) from Organic and Inorganic Sources on Egg Quality and Egg Zn, Mn, and Cu Content in Laying Hens. [Masters Thesis]. Louisiana State University; 2016. Available from: etd-06302016-144023 ; https://digitalcommons.lsu.edu/gradschool_theses/1424

University of Georgia
6.
Hannah, Jackie Fisher.
Influence of housing system on bacterial eggshell contamination and horizontal transmission of Salmonella and Campylobacter among laying hens.
Degree: 2014, University of Georgia
URL: http://hdl.handle.net/10724/26907
► In the U.S. table egg industry, commercial laying hens are primarily housed in conventional battery cages. Although there are several advantages to cage management, this…
(more)
▼ In the U.S. table egg industry, commercial laying hens are primarily housed in conventional battery cages. Although there are several advantages to cage management, this housing system has been extensively criticized for providing a barren
and confined environment that physically restricts laying hens from performing many of their natural behaviors. To address growing hen welfare concerns associated with caged housing and to meet consumer demand for cage-free products, a number of table
egg producers have transitioned to alternative, cage-free production systems. A study was conducted to evaluate eggshell bacterial numbers of non-washed and washed eggs from caged and cage-free laying hens housed on all wire slats or all shavings floor
systems. Non-washed eggs produced in an all-shavings environment had higher aerobic plate counts (APC, 4.0 log10 cfu/mL of rinsate) than eggs produced on slats (3.6 log10 cfu/mL), which had higher bacterial counts than eggs produced in cages (3.1 log10
cfu/mL). Washing eggs significantly (P<0.05) reduced APC levels by 1.6 log10 cfu/mL. The influence of caged and cage-free housing systems on the spread of Salmonella and Campylobacter among laying hens was also evaluated. Hens challenged with
Salmonella (S. Typhimurium or S. Enteritidis) and Campylobacter (C. coli or C. jejuni) were commingled with non-challenged hens in conventional cages, on all wire slats, or on all shavings floors. There was no significant difference (P<0.05) in
horizontal transmission of Salmonella among non-challenged hens housed in cages (12%), on slats (15%), and on shavings (14%). However, horizontal transmission of Campylobacter among non-challenged hens was significantly lower in cages (28%) than on
shavings (47%), with slats (36%) being intermediate. The objectives of the final study were to compare the colonization potential of the previously utilized S. Enteritidis marker strain to that of a S. Enteritidis field strain and the previously utilized
S. Typhimurium marker strain, and evaluate the effects of a vancomycin pretreatment on Salmonella colonization in laying hens. The S. Enteritidis field strain and S. Typhimurium marker strain colonized the ceca, spleen, and liver/gallbladder at
significantly (P<0.05) higher rates than the S. Enteritidis marker strain. Vancomycin pretreatment had no significant effect on Salmonella colonization.
Subjects/Keywords: Eggshell bacteria; hen housing system; caged laying hens; cage-free laying hens; horizontal transmission; Salmonella; Campylobacter; vancomycin
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Hannah, J. F. (2014). Influence of housing system on bacterial eggshell contamination and horizontal transmission of Salmonella and Campylobacter among laying hens. (Thesis). University of Georgia. Retrieved from http://hdl.handle.net/10724/26907
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Hannah, Jackie Fisher. “Influence of housing system on bacterial eggshell contamination and horizontal transmission of Salmonella and Campylobacter among laying hens.” 2014. Thesis, University of Georgia. Accessed April 18, 2021.
http://hdl.handle.net/10724/26907.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Hannah, Jackie Fisher. “Influence of housing system on bacterial eggshell contamination and horizontal transmission of Salmonella and Campylobacter among laying hens.” 2014. Web. 18 Apr 2021.
Vancouver:
Hannah JF. Influence of housing system on bacterial eggshell contamination and horizontal transmission of Salmonella and Campylobacter among laying hens. [Internet] [Thesis]. University of Georgia; 2014. [cited 2021 Apr 18].
Available from: http://hdl.handle.net/10724/26907.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Hannah JF. Influence of housing system on bacterial eggshell contamination and horizontal transmission of Salmonella and Campylobacter among laying hens. [Thesis]. University of Georgia; 2014. Available from: http://hdl.handle.net/10724/26907
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Universiteit Utrecht
7.
Kunst, J.
Housing conditions and welfare of laying hens.
Degree: 2012, Universiteit Utrecht
URL: http://dspace.library.uu.nl:8080/handle/1874/223256
► The huge production of eggs on a world-wide basis raises questions about the welfare of laying hens in the egg production industry. This study compared…
(more)
▼ The huge production of eggs on a world-wide basis raises questions about the welfare of
laying hens in the egg production industry. This study compared the
laying hen welfare, based on the 5 animal freedoms, in the following housing systems: conventional cage, enriched cage, barn, free-range and organic. These housing systems each represent a different EU-egg code, which should represent a certain level of welfare for the consumer (in which conventional cage
hens have the worst and organic
hens the best welfare). Literature review showed that each system had its pros and cons. Natural behaviour was impaired in the conventional cage system, but cage-
hens had less diseases and bone-fractures. Although free-ranging
hens had the opportunity to express more natural behaviours, large group sizes caused severe feather pecking problems. Improvements are suggested for the housing systems as well as for the EU-egg code classifying systems. Housing systems should be designed according to the behavioural needs of the
laying hen, as is done in the new Rondeel system in the Netherlands. Furthermore, each egg production company should be tested for
laying hen welfare, and not for meeting the standard criteria of one of the housing systems. Thereby providing a more accurate estimation of the welfare of our egg producers for the consumer.
Advisors/Committee Members: Staay, F.J. van der.
Subjects/Keywords: Laying hens; hens; welfare; housing conditions; feather pecking; cage; free-range; organic; rondeel
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Kunst, J. (2012). Housing conditions and welfare of laying hens. (Masters Thesis). Universiteit Utrecht. Retrieved from http://dspace.library.uu.nl:8080/handle/1874/223256
Chicago Manual of Style (16th Edition):
Kunst, J. “Housing conditions and welfare of laying hens.” 2012. Masters Thesis, Universiteit Utrecht. Accessed April 18, 2021.
http://dspace.library.uu.nl:8080/handle/1874/223256.
MLA Handbook (7th Edition):
Kunst, J. “Housing conditions and welfare of laying hens.” 2012. Web. 18 Apr 2021.
Vancouver:
Kunst J. Housing conditions and welfare of laying hens. [Internet] [Masters thesis]. Universiteit Utrecht; 2012. [cited 2021 Apr 18].
Available from: http://dspace.library.uu.nl:8080/handle/1874/223256.
Council of Science Editors:
Kunst J. Housing conditions and welfare of laying hens. [Masters Thesis]. Universiteit Utrecht; 2012. Available from: http://dspace.library.uu.nl:8080/handle/1874/223256

University of Georgia
8.
Lordelo, Maria Madalena.
An examination of gossypol toxicity in broilers and laying hens and the development of a novel use for cottonseed meal in poultry diets and of a rapid assay for quantifying gossypol in cottonseed meal.
Degree: 2014, University of Georgia
URL: http://hdl.handle.net/10724/22436
► Gossypol is a toxic compound found in cottonseed meal. Experiments were conducted to determine the relative toxicity of the (+) and (-) enantiomers of gossypol…
(more)
▼ Gossypol is a toxic compound found in cottonseed meal. Experiments were conducted to determine the relative toxicity of the (+) and (-) enantiomers of gossypol in poultry. The individual pure gossypol enantiomers were added to nutritionally
complete diets and then fed to broilers, laying hens, and broiler breeder hens. The (-) enantiomer of gossypol was detrimental to feed intake in broilers and broiler breeder hens while the (+) enantiomer of gossypol inhibited feed intake in laying hens.
Severe egg yolk discoloration was caused by (+)-gossypol in both laying and broiler breeder hens. Since both (-)- and (+)-gossypol have toxic effects in chickens, the development of a cotton strain containing only one gossypol enantiomer would not be
beneficial for the poultry industry. To determine if cottonseed meal could replace soybean meal in broiler breeder pullet diets, pullets were fed a diet containing either cottonseed meal or soybean meal as the major protein source from 2 to 18 weeks of
age. Flock body weight uniformity during the rearing period was improved in pullets consuming cottonseed meal as the major protein source. Furthermore, subsequent reproductive performance was not affected in broiler breeder pullets fed cottonseed meal
during the rearing period. Therefore, cottonseed meal has advantages over soybean meal in broiler breeder pullet diets. To determine if near infrared reflectance spectroscopy could be successfully utilized to rapidly measure free gossypol concentration
in cottonseed meal, a near infrared calibration equation for gossypol was developed. There was a high correlation between the values of gossypol determined by the conventional chemical-based reference method and by the near infrared reflectance
spectroscopy method. The results suggest that there are no apparent advantages for poultry in altering the enantiomeric ratio of the cotton plant, but that cottonseed meal can be successfully utilized by the poultry industry in broiler breeder pullet
diets and that the poultry industry could use near infrared reflectance spectroscopy technology to determine the free gossypol content of cottonseed meal.
Subjects/Keywords: Broilers; Laying hens; Broiler breeder hens; Cottonseed meal; Gossypol enantiomers; Near infrared reflectance spectroscopy; Toxicity
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
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APA (6th Edition):
Lordelo, M. M. (2014). An examination of gossypol toxicity in broilers and laying hens and the development of a novel use for cottonseed meal in poultry diets and of a rapid assay for quantifying gossypol in cottonseed meal. (Thesis). University of Georgia. Retrieved from http://hdl.handle.net/10724/22436
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Lordelo, Maria Madalena. “An examination of gossypol toxicity in broilers and laying hens and the development of a novel use for cottonseed meal in poultry diets and of a rapid assay for quantifying gossypol in cottonseed meal.” 2014. Thesis, University of Georgia. Accessed April 18, 2021.
http://hdl.handle.net/10724/22436.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Lordelo, Maria Madalena. “An examination of gossypol toxicity in broilers and laying hens and the development of a novel use for cottonseed meal in poultry diets and of a rapid assay for quantifying gossypol in cottonseed meal.” 2014. Web. 18 Apr 2021.
Vancouver:
Lordelo MM. An examination of gossypol toxicity in broilers and laying hens and the development of a novel use for cottonseed meal in poultry diets and of a rapid assay for quantifying gossypol in cottonseed meal. [Internet] [Thesis]. University of Georgia; 2014. [cited 2021 Apr 18].
Available from: http://hdl.handle.net/10724/22436.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Lordelo MM. An examination of gossypol toxicity in broilers and laying hens and the development of a novel use for cottonseed meal in poultry diets and of a rapid assay for quantifying gossypol in cottonseed meal. [Thesis]. University of Georgia; 2014. Available from: http://hdl.handle.net/10724/22436
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
9.
Fátima Naomi Takata.
Avaliação morfológica do oviduto e qualidade de ovos de poedeiras comerciais (Gallus gallus) em diferentes fases de produção.
Degree: 2006, Universidade Federal Rural de Pernambuco
URL: http://200.17.137.108/tde_busca/arquivo.php?codArquivo=791
► The laying hens available currently is submit genetics modified for produce greatest egg an low cost. The important fact for continuation this evolution is knowledge…
(more)
▼ The laying hens available currently is submit genetics modified for produce greatest egg an low cost. The important fact for continuation this evolution is knowledge the cell oviduct (egg factory). In laying (Gallus gallus) the oviduct is describe with muscular tube winding, its length esteemed between 14 and 19 cm in outside the ovoposition and 42 and 86 during ovoposition. Opening next ovary and end in cloak, compose whit six region, the fimbrias, infundibulun, magnum, isthmus, shell gland and vagin. The egg quail is check for describe a different in production fresh egg, for genetics characteristics, diet and environmental factors. This works study a laying hens oviduct morphology associate in productions rate and egg quail. We available 2456 laying. For morphology studding using 80 hens divide in eight groups. The collect fact in different stage the production, between 20 and 60 age week. The material are processed for habitual techniques in histological laboratories. The oviduct epithelial morphology (in magnum, isthmus and shell gland) don`t variable with increase the age and productions, however we observe increase in glands at mucous. We are using 30 eggs for group. The egg quail observe a positive correlation between age with egg mass, egg white and yolk. The shell mass dontt significant correlation with egg mass, this fact explained low quail and increased the loss in relation to broken to egg. Dontt observe changes in physiology compositions in the oviduct with advance to age. This fact a indicative a most attention for nutritional requirement add up to management and appropriate environment for rear this poultry.
As linhagens de poedeiras comerciais existentes atualmente no mercado foram melhoradas geneticamente para produzir o máximo de ovos a um custo mínimo. Um fato importante para a continuidade desta evolução, é o conhecimento celular do oviduto ("fabrica do ovo"). Na galinha (Gallus gallus) o oviduto é descrito como sendo um tubo muscular tortuoso, cujo comprimento é estimado entre 14 e 19 cm na fase de não postura e de 42 a 86 cm durante a fase de postura. Abre-se próximo ao ovário e termina na cloaca, sendo formado por uma série de regiões que, da porção cranial para a caudal, são designadas de: fímbrias, infundíbulo, magno, istmo, glândula da casca e vagina. A qualidade do ovo é medida para descrever as diferenças na produção de ovos frescos, devido a características genéticas, a dietas e nos fatores ambientais, aos quais as galinhas são submetidas. Este trabalho teve como objetivo avaliar o oviduto de poedeiras comerciais em postura, através da morfologia e correlacionar os dados obtidos com a produção e qualidade dos ovos. Avaliou-se um lote com 2456 aves, do qual obteve-se uma amostra de 80 animais, divididos em oito grupos, para estudo morfológico. A coleta dos dados foi realizada em diferentes fases de produção da ave, entre 20 e 60 semanas. O material obtido foi processado pelas técnicas de rotina do laboratório de histologia. Observamos que a morfologia do epitélio do oviduto (magno,…
Advisors/Committee Members: Jean Carlos Ramos da Silva, Joaquim Evêncio Neto.
Subjects/Keywords: Poedeiras comerciais; Morfologia animal; Ovos; MEDICINA VETERINARIA; Laying hens; Morphology; Egg
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Record Details
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Takata, F. N. (2006). Avaliação morfológica do oviduto e qualidade de ovos de poedeiras comerciais (Gallus gallus) em diferentes fases de produção. (Thesis). Universidade Federal Rural de Pernambuco. Retrieved from http://200.17.137.108/tde_busca/arquivo.php?codArquivo=791
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Takata, Fátima Naomi. “Avaliação morfológica do oviduto e qualidade de ovos de poedeiras comerciais (Gallus gallus) em diferentes fases de produção.” 2006. Thesis, Universidade Federal Rural de Pernambuco. Accessed April 18, 2021.
http://200.17.137.108/tde_busca/arquivo.php?codArquivo=791.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Takata, Fátima Naomi. “Avaliação morfológica do oviduto e qualidade de ovos de poedeiras comerciais (Gallus gallus) em diferentes fases de produção.” 2006. Web. 18 Apr 2021.
Vancouver:
Takata FN. Avaliação morfológica do oviduto e qualidade de ovos de poedeiras comerciais (Gallus gallus) em diferentes fases de produção. [Internet] [Thesis]. Universidade Federal Rural de Pernambuco; 2006. [cited 2021 Apr 18].
Available from: http://200.17.137.108/tde_busca/arquivo.php?codArquivo=791.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Takata FN. Avaliação morfológica do oviduto e qualidade de ovos de poedeiras comerciais (Gallus gallus) em diferentes fases de produção. [Thesis]. Universidade Federal Rural de Pernambuco; 2006. Available from: http://200.17.137.108/tde_busca/arquivo.php?codArquivo=791
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
10.
Fátima Naomi Takata.
Avaliação morfológica do oviduto e qualidade de ovos de poedeiras comerciais (Gallus gallus) em diferentes fases de produção.
Degree: 2006, Universidade Federal Rural de Pernambuco
URL: http://200.17.137.108/tde_busca/arquivo.php?codArquivo=791
► As linhagens de poedeiras comerciais existentes atualmente no mercado foram melhoradas geneticamente para produzir o máximo de ovos a um custo mínimo. Um fato importante…
(more)
▼ As linhagens de poedeiras comerciais existentes atualmente no mercado foram melhoradas geneticamente para produzir o máximo de ovos a um custo mínimo. Um fato importante para a continuidade desta evolução, é o conhecimento celular do oviduto ("fabrica do ovo"). Na galinha (Gallus gallus) o oviduto é descrito como sendo um tubo muscular tortuoso, cujo comprimento é estimado entre 14 e 19 cm na fase de não postura e de 42 a 86 cm durante a fase de postura. Abre-se próximo ao ovário e termina na cloaca, sendo formado por uma série de regiões que, da porção cranial para a caudal, são designadas de: fímbrias, infundíbulo, magno, istmo, glândula da casca e vagina. A qualidade do ovo é medida para descrever as diferenças na produção de ovos frescos, devido a características genéticas, a dietas e nos fatores ambientais, aos quais as galinhas são submetidas. Este trabalho teve como objetivo avaliar o oviduto de poedeiras comerciais em postura, através da morfologia e correlacionar os dados obtidos com a produção e qualidade dos ovos. Avaliou-se um lote com 2456 aves, do qual obteve-se uma amostra de 80 animais, divididos em oito grupos, para estudo morfológico. A coleta dos dados foi realizada em diferentes fases de produção da ave, entre 20 e 60 semanas. O material obtido foi processado pelas técnicas de rotina do laboratório de histologia. Observamos que a morfologia do epitélio do oviduto (magno, istmo e glândula da casca) não sofre alterações com o aumento da idade e da produção, porém observamos um visível aumento das glândulas na camada mucosa. Foram utilizados 30 ovos por grupo, sendo os dados relativos à qualidade interna dos ovos submetidos a analise de correlação, onde demonstraram uma correlação positiva da idade com o peso do ovo, da clara e da gema. O peso da casca não apresentou correlações positivas significativas, que pode explicar a piora da qualidade desta e conseqüentemente aumento das perdas relacionadas á quebra dos ovos. Não observarmos alterações na composição morfológica do oviduto com o avanço da idade, o que sugere uma maior atenção ao aporte nutricional, somado ao manejo e ambiente adequados de criação dessas aves.
The laying hens available currently is submit genetics modified for produce greatest egg an low cost. The important fact for continuation this evolution is knowledge the cell oviduct (egg factory). In laying (Gallus gallus) the oviduct is describe with muscular tube winding, its length esteemed between 14 and 19 cm in outside the ovoposition and 42 and 86 during ovoposition. Opening next ovary and end in cloak, compose whit six region, the fimbrias, infundibulun, magnum, isthmus, shell gland and vagin. The egg quail is check for describe a different in production fresh egg, for genetics characteristics, diet and environmental factors. This works study a laying hens oviduct morphology associate in productions rate and egg quail. We available 2456 laying. For morphology studding using 80 hens divide in eight groups. The collect fact in different stage the production, between 20 and 60…
Advisors/Committee Members: Jean Carlos Ramos da Silva, Joaquim Evêncio Neto.
Subjects/Keywords: Poedeiras comerciais; Morfologia animal; Ovos; MEDICINA VETERINARIA; Laying hens; Morphology; Egg
Record Details
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Record Details
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Takata, F. N. (2006). Avaliação morfológica do oviduto e qualidade de ovos de poedeiras comerciais (Gallus gallus) em diferentes fases de produção. (Thesis). Universidade Federal Rural de Pernambuco. Retrieved from http://200.17.137.108/tde_busca/arquivo.php?codArquivo=791
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Takata, Fátima Naomi. “Avaliação morfológica do oviduto e qualidade de ovos de poedeiras comerciais (Gallus gallus) em diferentes fases de produção.” 2006. Thesis, Universidade Federal Rural de Pernambuco. Accessed April 18, 2021.
http://200.17.137.108/tde_busca/arquivo.php?codArquivo=791.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Takata, Fátima Naomi. “Avaliação morfológica do oviduto e qualidade de ovos de poedeiras comerciais (Gallus gallus) em diferentes fases de produção.” 2006. Web. 18 Apr 2021.
Vancouver:
Takata FN. Avaliação morfológica do oviduto e qualidade de ovos de poedeiras comerciais (Gallus gallus) em diferentes fases de produção. [Internet] [Thesis]. Universidade Federal Rural de Pernambuco; 2006. [cited 2021 Apr 18].
Available from: http://200.17.137.108/tde_busca/arquivo.php?codArquivo=791.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Takata FN. Avaliação morfológica do oviduto e qualidade de ovos de poedeiras comerciais (Gallus gallus) em diferentes fases de produção. [Thesis]. Universidade Federal Rural de Pernambuco; 2006. Available from: http://200.17.137.108/tde_busca/arquivo.php?codArquivo=791
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
11.
JerÃnimo Ãvito GonÃalves de Brito.
Uso de microminerais sob a forma de complexo orgÃnico em raÃÃes de frangas na fase de recria.
Degree: 2005, UNIVERSIDADE FEDERAL DE LAVRAS
URL: http://bibtede.ufla.br/tede//tde_busca/arquivo.php?codArquivo=297
► O experimento foi conduzido no Setor de Avicultura do Departamento de Zootecnia da Universidade Federal de Lavras (UFLA), em Lavras, MG, Brasil. Objetivou-se estudar os…
(more)
▼ O experimento foi conduzido no Setor de Avicultura do Departamento de Zootecnia da Universidade Federal de Lavras (UFLA), em Lavras, MG, Brasil. Objetivou-se estudar os efeitos da utilizaÃÃo de microminerais na forma de complexo orgÃnico em raÃÃes de frangas na fase de recria, sobre o desempenho e caracterÃsticas Ãsseas no perÃodo de 7-16 semanas, bem como o desempenho das poedeiras atà a 32 semana de idade. Os tratamentos avaliados consistiram da suplementaÃÃo dos microminerais na forma inorgÃnica (tratamento controle) e orgÃnica, com inclusÃo de 0,4% na raÃÃo, que corresponde aos nÃveis suplementares de 60, 80, 70, 10, 1 e 0,3 ppm de zinco, ferro, manganÃs, cobre, iodo e selÃnio, respectivamente, e a reduÃÃo na de suplementaÃÃo dos microminerais sob a forma de complexo orgÃnico com os seguintes nÃveis de inclusÃo nas raÃÃes: 0,35; 0,3; 0,25 e 0,2%. As raÃÃes foram à base de milho e farelo de soja, balanceadas segundo recomendaÃÃes nutricionais do Manual da Linhagem Lohmann â LSL (2002). Um total de 648 frangas Lohmann â LSL, aos 42 dias de idade, foi utilizado, com 18 e 16 aves por parcela, respectivamente, nos perÃodos de 7 a 12 e 13 a 16 semanas de idade, distribuÃdas em um delineamento inteiramente casualizado (DIC) com 6 tratamentos e 6 repetiÃÃes. Na fase de produÃÃo, adotou-se um DIC em esquema de parcela subdividida no tempo (4 perÃodos de 21 dias), com 6 repetiÃÃes e 12 aves por parcela, recebendo uma mesma raÃÃo, para a avaliaÃÃo dos efeitos dos tratamentos aplicados na fase de recria. NÃo houve diferenÃas significativas (P>0,05) entre os tratamentos para caracterÃsticas de desempenho na fase de 7 a 12 e 7 a 16 semanas. A uniformidade nÃo foi influenciada (P>0,05) na 12 e 16 semana de idade das aves. Houve reduÃÃo linear (P<0,05) do teor de cinzas nas tÃbias das frangas na 12 semana com a reduÃÃo nos nÃveis de inclusÃo do suplemento orgÃnico. PorÃm, nÃo houve diferenÃas para esta caracterÃstica (P>0,05) na 16 e 32 semana de idade. O teor de zinco em tÃbias, assim como o peso, comprimento, espessura e Ãndice Ãsseo da tÃbia e fÃmur e a densidade do fÃmur nÃo foram influenciados pelos tratamentos (P>0,05) nas idades avaliadas, assim como caracterÃsticas desempenho e qualidade dos ovos, no perÃodo de 20 a 32 semanas de idade das aves. Nessas condiÃÃes conclui-se que a fonte orgÃnica de suplementaÃÃo de microminerais apresentou vantagem comparativa, em relaÃÃo à fonte inorgÃnica, possibilitando a reduÃÃo nos nÃveis de suplementaÃÃo para 30, 40, 35, 5, 0,5 e 0,15 ppm de zinco, ferro, manganÃs, cobre, iodo e selÃnio respectivamente, sem afetar negativamente o desempenho e caracterÃsticas Ãsseas na recria e o desempenho e qualidade dos ovos atà a 32 semana de idade.
The experiment was carried out in the Section of Poultry Production of the Department of Animal Sciences at the Federal University of Lavras - UFLA, in Lavras, MG, Brasil. It was aimed to study the effects of mineral trace in the organic complex in diets of pullets in the rearing phase, on the performance and bone characteristics in the…
Advisors/Committee Members: Rilke Tadeu Fonseca de Freitas, Ãdison Josà Fassani, Paulo Borges Rodrigues, AntÃnio Gilberto Bertechini.
Subjects/Keywords: laying hens; monogastric nutrition; ZOOTECNIA; NutriÃÃo de monogÃstrico; Podeira
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Brito, J. . G. d. (2005). Uso de microminerais sob a forma de complexo orgÃnico em raÃÃes de frangas na fase de recria. (Thesis). UNIVERSIDADE FEDERAL DE LAVRAS. Retrieved from http://bibtede.ufla.br/tede//tde_busca/arquivo.php?codArquivo=297
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Brito, JerÃnimo Ãvito GonÃalves de. “Uso de microminerais sob a forma de complexo orgÃnico em raÃÃes de frangas na fase de recria.” 2005. Thesis, UNIVERSIDADE FEDERAL DE LAVRAS. Accessed April 18, 2021.
http://bibtede.ufla.br/tede//tde_busca/arquivo.php?codArquivo=297.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Brito, JerÃnimo Ãvito GonÃalves de. “Uso de microminerais sob a forma de complexo orgÃnico em raÃÃes de frangas na fase de recria.” 2005. Web. 18 Apr 2021.
Vancouver:
Brito JGd. Uso de microminerais sob a forma de complexo orgÃnico em raÃÃes de frangas na fase de recria. [Internet] [Thesis]. UNIVERSIDADE FEDERAL DE LAVRAS; 2005. [cited 2021 Apr 18].
Available from: http://bibtede.ufla.br/tede//tde_busca/arquivo.php?codArquivo=297.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Brito JGd. Uso de microminerais sob a forma de complexo orgÃnico em raÃÃes de frangas na fase de recria. [Thesis]. UNIVERSIDADE FEDERAL DE LAVRAS; 2005. Available from: http://bibtede.ufla.br/tede//tde_busca/arquivo.php?codArquivo=297
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University
12.
Donalson, Lisa Michelle.
The in vivo and in vitro effect of a fructooligosaccharide prebiotic combined with alfalfa molt diets on egg production and salmonella in laying hens.
Degree: MS, Poultry Science, 2005, Texas A&M University
URL: http://hdl.handle.net/1969.1/2377
► Salmonellosis affects an estimated 1.4 million people a year with a great majority of cases never being reported. Salmonella Enteritidis (SE) can be found in…
(more)
▼ Salmonellosis affects an estimated 1.4 million people a year with a great majority
of cases never being reported. Salmonella Enteritidis (SE) can be found in a variety of
foods including poultry meat and eggs. Susceptibility of SE colonization is increased by
molting.
Induced molting is used in the poultry industry to rejuvenate the hen??s
reproductive tract and increase post molt egg quality and production. The most common
molting method is complete feed withdrawal. Recent animal welfare pressures have
encouraged the industry to seek alternatives to feed withdrawal with one alternative
being feeding a high fiber diet like alfalfa. Alfalfa is high in protein, but low in energy
which is desirable for a molt diet. Alfalfa??s fermentation properties have been thought to
be an inhibitor in pathogen colonization during molting. Including a prebiotic such as
fructooligosaccharide (FOS) in the molt diet is thought to further decrease colonization
while benefiting the indigenous microflora.
Laying hens were molted using alfalfa combined with different ratios of layer
ration in an in vivo experiment. The
hens responded comparably to the alfalfa molt dietsas they did to feed withdrawal as far as post-molt production parameters were
concerned, thus showing that alfalfa was a viable alternative molt diet.
Two in vitro studies were designed to evaluate the fermentation properties of
alfalfa and layer ration combined with the prebiotic FOS and their abilities to inhibit
Salmonella growth. Each treatment was combined with diluted cecal contents and
allowed to ferment. The results showed that the most fermentation occurred when
alfalfa was the substrate and was slightly increased with the addition of FOS. In
addition, combining FOS with alfalfa inhibited Salmonella growth.
To integrate these results, an in vivo study was preformed using an alfalfa/layer
ration diet from the previous in vivo study with FOS. Volatile fatty acids and lactic acid
measurements were made to evaluate fermentation while Salmonella colonization was
measured in pertinent organs and in fecal shedding. The results of this study further
substantiate alfalfa as a molt diet and conclude that the addition of FOS does, while not
statistically significant, further inhibit Salmonella colonization.
Advisors/Committee Members: Ricke, Steven (advisor), Keeton, Jimmy (committee member), Kubena, Leon (committee member).
Subjects/Keywords: Prebiotics; Laying hens; Molting; Alfalfa
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Donalson, L. M. (2005). The in vivo and in vitro effect of a fructooligosaccharide prebiotic combined with alfalfa molt diets on egg production and salmonella in laying hens. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/2377
Chicago Manual of Style (16th Edition):
Donalson, Lisa Michelle. “The in vivo and in vitro effect of a fructooligosaccharide prebiotic combined with alfalfa molt diets on egg production and salmonella in laying hens.” 2005. Masters Thesis, Texas A&M University. Accessed April 18, 2021.
http://hdl.handle.net/1969.1/2377.
MLA Handbook (7th Edition):
Donalson, Lisa Michelle. “The in vivo and in vitro effect of a fructooligosaccharide prebiotic combined with alfalfa molt diets on egg production and salmonella in laying hens.” 2005. Web. 18 Apr 2021.
Vancouver:
Donalson LM. The in vivo and in vitro effect of a fructooligosaccharide prebiotic combined with alfalfa molt diets on egg production and salmonella in laying hens. [Internet] [Masters thesis]. Texas A&M University; 2005. [cited 2021 Apr 18].
Available from: http://hdl.handle.net/1969.1/2377.
Council of Science Editors:
Donalson LM. The in vivo and in vitro effect of a fructooligosaccharide prebiotic combined with alfalfa molt diets on egg production and salmonella in laying hens. [Masters Thesis]. Texas A&M University; 2005. Available from: http://hdl.handle.net/1969.1/2377

Texas A&M University
13.
Iselt, Stephanie Mae.
Effects of Mycotoxin Contaminated Diets on Immunosuppression or Interference with Other Physiological Parameters in Commercial-Strain Laying Chicks, Pullets or Hens.
Degree: MS, Poultry Science, 2013, Texas A&M University
URL: http://hdl.handle.net/1969.1/149418
► The principal objective of this investigation was to evaluate the effects of mycotoxin contaminated diets (deoxynivalenol (DON)), aflatoxin B1 (AFB1), and fumonisin (FUM)), with or…
(more)
▼ The principal objective of this investigation was to evaluate the effects of mycotoxin contaminated diets (deoxynivalenol (DON)), aflatoxin B1 (AFB1), and fumonisin (FUM)), with or without the use of a commercially available deactivating compound (DC), in young pullets and replacement
laying hens on performance, reproductive, serological, and histopathological parameters.
In trial 1, experimental treatments consisted of control, low toxin (1 µg DON/g + 1 µg AFB1/g), and high toxin (2 µg DON/g + 2 µg AFB1/g) diets. Pullets fed the high toxin diet had reduced (P<0.05) body weights compared to control and low toxin diets at d 14, 35, 49, 56, and 63. At d 21 and 28, there was a significant interaction observed between mycotoxin and DC inclusion in body weights. Following necropsies (d 35 and 65), relative liver weights and histopathological liver tissue damage were increased (P<0.05) in pullets fed high toxin diets when compared to control and low toxin diets. Relative kidney weights were increased (P<0.05) due to high toxin diet at d 65. Expected negative effects of toxin administration on titer development were not observed. The only interaction observed between mycotoxin administration and DC inclusion in trial 1 was on body weights.
In trial 2, experimental treatments consisted of control, DON (9 µg/g) challenge, AFB1 (2 µg/g) + FUM (54 µg/g) challenge, and a mixed challenge (6 µg DON/g, 1 µg AFB1/g, and 27 µg FUM/g). All mycotoxin diets fed to
hens negatively influenced (P<0.05) feed efficiency for the trial period spanning weeks 6 through 10 when compared to control diets. Egg production was not affected (P>0.05) by all mycotoxin diets weeks 6 through 10. Relative weights of the liver and kidney were increased (P<0.05) by AFB1+FUM challenge weeks 4 and 9 compared to control diet. The data reported in this study demonstrate that dietary DON and / or AFB1+FUM influence some performance, reproductive, histopathological, and egg quality traits, but by and large, replacement layer pullets seem to be relatively resistant to the mycotoxins evaluated in this trial at the described levels of administration.
Advisors/Committee Members: Caldwell, David J. (advisor), Byrd, James A. (committee member), Farnell, Morgan B. (committee member), Lee, Jason T. (committee member).
Subjects/Keywords: deoxynivalenol; aflatoxin B1; fumonisin; laying chicks; pullets; hens
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APA ·
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MLA ·
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CSE |
Export
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APA (6th Edition):
Iselt, S. M. (2013). Effects of Mycotoxin Contaminated Diets on Immunosuppression or Interference with Other Physiological Parameters in Commercial-Strain Laying Chicks, Pullets or Hens. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/149418
Chicago Manual of Style (16th Edition):
Iselt, Stephanie Mae. “Effects of Mycotoxin Contaminated Diets on Immunosuppression or Interference with Other Physiological Parameters in Commercial-Strain Laying Chicks, Pullets or Hens.” 2013. Masters Thesis, Texas A&M University. Accessed April 18, 2021.
http://hdl.handle.net/1969.1/149418.
MLA Handbook (7th Edition):
Iselt, Stephanie Mae. “Effects of Mycotoxin Contaminated Diets on Immunosuppression or Interference with Other Physiological Parameters in Commercial-Strain Laying Chicks, Pullets or Hens.” 2013. Web. 18 Apr 2021.
Vancouver:
Iselt SM. Effects of Mycotoxin Contaminated Diets on Immunosuppression or Interference with Other Physiological Parameters in Commercial-Strain Laying Chicks, Pullets or Hens. [Internet] [Masters thesis]. Texas A&M University; 2013. [cited 2021 Apr 18].
Available from: http://hdl.handle.net/1969.1/149418.
Council of Science Editors:
Iselt SM. Effects of Mycotoxin Contaminated Diets on Immunosuppression or Interference with Other Physiological Parameters in Commercial-Strain Laying Chicks, Pullets or Hens. [Masters Thesis]. Texas A&M University; 2013. Available from: http://hdl.handle.net/1969.1/149418
14.
Kumar, Dinesh.
Assessing the Response of Laying Hens to Digestible Balanced Protein from 27 to 66 Weeks of Age.
Degree: 2016, University of Saskatchewan
URL: http://hdl.handle.net/10388/7290
► As laying hens continue to improve in egg characteristics, it is relevant to examine their response to dietary digestible balanced protein (DBP). Research using Lohmann-LSL…
(more)
▼ As
laying hens continue to improve in egg characteristics, it is relevant to examine their response to dietary digestible balanced protein (DBP). Research using Lohmann-LSL
hens, from 27 to 66 wk of age, compared DBP intake levels using diets with essential amino acids (AA) balanced to digestible lysine (Dlys) intake levels of 550, 625, 700, 775 and 850 mg/hen/day. Each treatment was replicated 10 times with 12 birds per replicate. Two base diets containing 500 or 850 mg of Dlys per 100 g of diet were blended every three wk based on previous feed intakes to produce diets that would provide treatment levels of Dlys intake. Data collection included daily hen-day egg production (HDEP), and feed intake (FI), egg weight (EW), egg mass (EM), feed efficiency (FE) and egg specific gravity (ESG) every three wk.
Hens were weighed and scored for feather cover at 27, 47 and 66 wk of age. Egg components were measured at 41, 52 and 65 wk of age, including albumen height (AH), dry egg shell weight (ESW), and albumen and yolk weights (AW and YW). At the end of the experiment, pectoralis muscle (PM), abdominal fat pad (AFP), heart, liver and kidneys were collected from 10 randomly euthanized
hens per treatment and weighed. Empty weight and length of gastrointestinal tract (GIT) segments were also measured. Excreta samples were collected twice from five randomly selected cages per treatment to determine total excreta nitrogen (N) content. In a completely randomized experimental design, the data were analyzed using one-way ANOVA as mixed model and by using PROC regression and PROC response surface regression procedures of SAS 9.3 (2003). Differences in means were considered significant when P ≤ 0.05. The effect of increasing DBP on hen weight, HDEP, EW, EM, FI and FE was quadratic. By using a non-linear regression model, a maximum response for HDEP, EW, EM and FE was observed at 769, 836, 903 and 839 mg/h/d intake of Dlys, respectively. Increasing Dlys levels increased AFP weight linearly and PM weight increased quadratically. Heart, liver and kidney weights were not affected by Dlys intake. Proventriculus absolute weight was increased while gizzard weight decreased linearly with increasing Dlys intakes. Intestinal segment weights decreased linearly or quadratically with increasing Dlys intake. Caeca measurements were not affected by the treatment. Feather score increased with Dlys intake level. Both percent ESW and ESG decreased linearly with increasing intake levels of Dlys. Absolute AW (linear) and YW (quadratic) increased with Dlys intake; proportional values for these criteria were affected in a quadratic manner, but the effects were small. Excreta N content increased in a quadratic manner with increasing amino acid intake. In conclusion, the response of Lohmann-LSL
hens to DBP was determined and the DBP (based on diets with essential AA balanced to Dlys) level required to maximize the response varied with the criteria being assessed.
Keywords: ideal protein, egg mass, body composition, plumage, egg quality, excreta nitrogen
Advisors/Committee Members: Classen, Henry L, Schwean-Lardner, Karen, Scott, Tom, Zuidhof, Martin.
Subjects/Keywords: Laying hens; balanced protein
…OF LAYING HENS ............ 51
4.1.
Abstract… …83
viii
LIST OF TABLES
Table 2.1 Ideal amino acid recommendations for laying hens with… …requirements for egg production in laying hens ............................... 18
Table 3.1… …laying hens from 27 to 66 wk
of age… …on egg sizes as a
percent of total egg production in laying hens from 27 to 66 wk of age…
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Kumar, D. (2016). Assessing the Response of Laying Hens to Digestible Balanced Protein from 27 to 66 Weeks of Age. (Thesis). University of Saskatchewan. Retrieved from http://hdl.handle.net/10388/7290
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Kumar, Dinesh. “Assessing the Response of Laying Hens to Digestible Balanced Protein from 27 to 66 Weeks of Age.” 2016. Thesis, University of Saskatchewan. Accessed April 18, 2021.
http://hdl.handle.net/10388/7290.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Kumar, Dinesh. “Assessing the Response of Laying Hens to Digestible Balanced Protein from 27 to 66 Weeks of Age.” 2016. Web. 18 Apr 2021.
Vancouver:
Kumar D. Assessing the Response of Laying Hens to Digestible Balanced Protein from 27 to 66 Weeks of Age. [Internet] [Thesis]. University of Saskatchewan; 2016. [cited 2021 Apr 18].
Available from: http://hdl.handle.net/10388/7290.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Kumar D. Assessing the Response of Laying Hens to Digestible Balanced Protein from 27 to 66 Weeks of Age. [Thesis]. University of Saskatchewan; 2016. Available from: http://hdl.handle.net/10388/7290
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

North Carolina State University
15.
Jackson, Emily Dawn.
CA125 Expression on Spontaneous Ovarian Adenocarinornas from Geriatric Laying Hens.
Degree: MS, Physiology, 2007, North Carolina State University
URL: http://www.lib.ncsu.edu/resolver/1840.16/955
► Despite years of research ovarian cancer remains the most lethal of all gynecological malignancies. Ovarian cancer is the fourth leading cause of cancer death among…
(more)
▼ Despite years of research ovarian cancer remains the most lethal of all gynecological malignancies. Ovarian cancer is the fourth leading cause of cancer death among women in the United States. It is estimated that in the United States in 2007 there will be 22,430 new cases of ovarian cancer diagnosed and 15,280 deaths. The high mortality rate is due to the fact that ovarian cancer typically presents itself as a late stage disease. There is currently no method to detect ovarian cancer in the early stages when the disease is 90% treatable. Progress toward understanding the ovarian cancer disease process is hindered by the absence of a biologically adequate animal model. Domestic
hens maintained under intensive egglaying conditions spontaneously develop ovarian adenocarcinomas. A typical hen will produce 280 or more eggs in 50 weeks. Just as in older females, fertility in
hens decreases after 2 years of age.
The first objective in the current study was to further establish the chicken as an acceptable animal model for human disease. This was done by determining the presence of a known ovarian cancer tumor marker, CA125, in avian ovarian cancer tissue samples and cells isolated from solid tumors. CA125 is a glycoprotein expressed on the cell surface of ovarian cancer cells and has a molecular weight above 200 kDa. In the avian species CA125 is represented by a band of molecular weight 25-50 kDa.
The objective of the second experiment was to determine if stage or level of metastasis has an affect on CA125 expression in avian ovarian cancer samples. CA125 has been established as a tool in the clinical setting for following progression of disease and response to treatment because CA125 increases with recurrence of disease after remission. The level of metastasis is significant because ovarian cancer typically is not detected until late disease stage when tumors have spread beyond the ovary to other body organs. Increased levels of CA125 would therefore be correlated with increased levels of disease spread throughout the body cavity. Despite the evidence seen in human clinical results, this experiment did not show any correlation between CA125 expression and disease stage or level of metastasis.
The third objective was to evaluate the presence of CA125 in oviductal tumors. CA125 production may play a significant role in determining the primary site of tumor formation, which aids in disease management. This experiment tested whether avian primary oviductal tumors express CA125. It also tested whether oviductal tumors secondary to ovarian cancer expressed CA125. It has been shown that CA125 can be shed from a primary tumor and attach to mesothelin on the mesothelium in the peritoneal cavity to allow metastasis to occur. The results suggest that primary oviductal tumors do not express CA125 and secondary oviductal tumors also do not express CA125.
The objective of the fourth experiment was to compare CA125 expressed in human ovarian cancer with samples taken from avian ovarian tumors. Objective 1 resulted in a protein of…
Advisors/Committee Members: Kenneth E. Anderson, Committee Member (advisor), Chris M. Ashwell, Committee Co-Chair (advisor), Paul E. Mozdziak, Committee Chair (advisor).
Subjects/Keywords: CA125; ovarian cancer; laying hens
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Jackson, E. D. (2007). CA125 Expression on Spontaneous Ovarian Adenocarinornas from Geriatric Laying Hens. (Thesis). North Carolina State University. Retrieved from http://www.lib.ncsu.edu/resolver/1840.16/955
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Jackson, Emily Dawn. “CA125 Expression on Spontaneous Ovarian Adenocarinornas from Geriatric Laying Hens.” 2007. Thesis, North Carolina State University. Accessed April 18, 2021.
http://www.lib.ncsu.edu/resolver/1840.16/955.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Jackson, Emily Dawn. “CA125 Expression on Spontaneous Ovarian Adenocarinornas from Geriatric Laying Hens.” 2007. Web. 18 Apr 2021.
Vancouver:
Jackson ED. CA125 Expression on Spontaneous Ovarian Adenocarinornas from Geriatric Laying Hens. [Internet] [Thesis]. North Carolina State University; 2007. [cited 2021 Apr 18].
Available from: http://www.lib.ncsu.edu/resolver/1840.16/955.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Jackson ED. CA125 Expression on Spontaneous Ovarian Adenocarinornas from Geriatric Laying Hens. [Thesis]. North Carolina State University; 2007. Available from: http://www.lib.ncsu.edu/resolver/1840.16/955
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
16.
Kvederytė,
Inga.
Lesalų, praturtintų saulėgrąžų, rapsų ir sėmenų
aliejais, įtaka vištų dedeklių produktyvumui ir kiaušinių
kokybei.
Degree: Master, Public Health, 2013, Lithuanian Academic Libraries Network (LABT)
URL: http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2013~D_20130618_095118-68885
;
► Darbo tikslas: Išanalizuoti lesalų, praturtintų saulėgrąžų, rapsų ir sėmenų aliejais, įtaką vištų dedeklių produktyvumui ir kiaušinių kokybei. Darbo uždaviniai: 1. Įvertinti saulėgrąžų, rapsų ir sėmenų…
(more)
▼ Darbo tikslas: Išanalizuoti lesalų,
praturtintų saulėgrąžų, rapsų ir sėmenų aliejais, įtaką vištų
dedeklių produktyvumui ir kiaušinių kokybei. Darbo uždaviniai: 1.
Įvertinti saulėgrąžų, rapsų ir sėmenų aliejų riebalų rūgščių
sudėtį; 2. Išanalizuoti lesalų, praturtintų saulėgrąžų, rapsų ir
sėmenų aliejais, įtaką vištų dedeklių produktyvumui; 3.
Išanalizuoti lesalų, praturtintų saulėgrąžų, rapsų ir sėmenų
aliejais, įtaką vištų dedeklių kiaušinių kokybei. Tyrimo metodika.
Lesinimo bandymas atliktas su 30 savaičių amžiaus Lohmann Brown
linijų derinio 30 vnt. dėsliosiomis vištomis, suskirstytomis į 3
grupes (kiekvienoje po 10 vištų). I grupės dėsliosios vištos buvo
lesinamos lesalais su 4,5 proc. saulėgrąžų aliejaus priedu, II
grupės su 4,5 proc. rapsų aliejaus, o III grupės su 4,5 proc. Visų
grupių lesalų energetinė vertė buvo vienoda. sėmenų aliejaus
priedu. Bandymo metu dėsliosios vištos laikytos individualiuose
narveliuose su stacionariomis lesalinėmis bei girdytuvėmis,
vienodomis lesinimo ir laikymo sąlygomis. Paukščiai lesinti
granuliuotais kombinuotaisiais lesalais po 125 g per parą.
Kiekvieną dieną skaičiuoti ir sverti visi kiaušiniai, paskaičiuotas
vištų dėjimo intensyvumas. Kas 14 dienų nustatytas individualus
vištų kūno svoris, sverti lesalų likučiai ir apskaičiuotos lesalų
sąnaudos 1 kg kiaušinių masės pagaminti. Bandymo pabaigoje buvo
tiriami šie parametrai: nustatomi riebalų rūgščių, cholesterolio,
malondialdehido kiekiai kiaušinių tryniuose. Taip pat nustatytos...
[toliau žr. visą tekstą]
Aim of master thesis: To analyze the feed,
enriched with sunflower, canola and flaxseed oils influence on
productivity of laying hens and egg quality. Objectives are: 1. To
evaluate a nutritional value of sunflower, rapeseed and flaxseed
oils; 2. To analyze influence of compound feed, enriched with
sunflower, rapeseed and flaxseed oils, on productivity of laying
hens; 3. To analyze influence of compound feed, enriched with
sunflower, rapeseed and flaxseed oils, on laying hens egg quality.
Methods: A test of feeding was performed on thirty 30 weeks old
Lohman Brown cross laying hens which were divided into 3 groups
(each of 10 hens). Laying hens of a group I were fed feeds
containing 4,5 % sunflower oil, group II – 4,5 % rapeseed oil,
group III – 4,5 % flaxseed oil. All diets were isocaloric. During
the test laying hens were held in individual cages with stationary
trough feeders and waterers on equal feeding and keeping
conditions. Laying hens were fed with compounds feeds of 125 g per
day. All the eggs were counted and weighted daily including the
calculations of egg laying intensity. The following actions were
performed every 14 days: identification of individual hen body
weight, weighting of feed residue and calculation of feed required
for production of 1 kg egg mass. At the end of the test these
parameters were investigated: determination of fatty acids,
cholesterol and malondialdehyde quantities in the yolk of eggs.
Also, egg sensory and texture properties of fresh eggs... [to full
text]
Advisors/Committee Members: Savickis, Saulius (Master’s degree committee chair), Malakauskas, Mindaugas (Master’s degree committee member), Zaborskienė, Gintarė (Master’s degree committee member), Šernienė, Loreta (Master’s degree committee member), Šarlauskas, Alvidas (Master’s degree committee member), Špakauskas, Vytautas (Master’s degree committee member), Stankevičienė, Marija (Master’s degree committee member), Bagdonienė, Rima (Master’s degree session secretary), Gružauskas, Romas (Master’s thesis supervisor), Stankevičienė, Marija (Master’s thesis reviewer).
Subjects/Keywords: Aliejai; Vištos; Kiaušinių
kokybė; Produktyvumas; Oils; Laying hens; Egg quality; Productivity
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Kvederytė,
Inga. (2013). Lesalų, praturtintų saulėgrąžų, rapsų ir sėmenų
aliejais, įtaka vištų dedeklių produktyvumui ir kiaušinių
kokybei. (Masters Thesis). Lithuanian Academic Libraries Network (LABT). Retrieved from http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2013~D_20130618_095118-68885 ;
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
Chicago Manual of Style (16th Edition):
Kvederytė,
Inga. “Lesalų, praturtintų saulėgrąžų, rapsų ir sėmenų
aliejais, įtaka vištų dedeklių produktyvumui ir kiaušinių
kokybei.” 2013. Masters Thesis, Lithuanian Academic Libraries Network (LABT). Accessed April 18, 2021.
http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2013~D_20130618_095118-68885 ;.
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
MLA Handbook (7th Edition):
Kvederytė,
Inga. “Lesalų, praturtintų saulėgrąžų, rapsų ir sėmenų
aliejais, įtaka vištų dedeklių produktyvumui ir kiaušinių
kokybei.” 2013. Web. 18 Apr 2021.
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
Vancouver:
Kvederytė,
Inga. Lesalų, praturtintų saulėgrąžų, rapsų ir sėmenų
aliejais, įtaka vištų dedeklių produktyvumui ir kiaušinių
kokybei. [Internet] [Masters thesis]. Lithuanian Academic Libraries Network (LABT); 2013. [cited 2021 Apr 18].
Available from: http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2013~D_20130618_095118-68885 ;.
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
Council of Science Editors:
Kvederytė,
Inga. Lesalų, praturtintų saulėgrąžų, rapsų ir sėmenų
aliejais, įtaka vištų dedeklių produktyvumui ir kiaušinių
kokybei. [Masters Thesis]. Lithuanian Academic Libraries Network (LABT); 2013. Available from: http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2013~D_20130618_095118-68885 ;
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
17.
Decina, Caitlin.
An Investigation of Feather Damage in Canadian Laying Hens.
Degree: MS, Department of Population Medicine, 2018, University of Guelph
URL: https://atrium.lib.uoguelph.ca/xmlui/handle/10214/14671
► Feather damage (FD) due to feather pecking behaviour is a significant welfare problem in laying hens housed in modern production systems. The FD prevalence and…
(more)
▼ Feather damage (FD) due to feather pecking behaviour is a significant welfare problem in
laying hens housed in modern production systems. The FD prevalence and factors associated with FD in Canadian
laying hen flocks housed in alternative systems is described in this thesis. A scoring system for on-farm FD assessment and a questionnaire focused on housing and management practices were developed. The analysis was based on FD scores and cross-sectional survey data collected from egg farms across Canada from October to December 2017. Prevalence of FD was found to be 21.9% (95% CI: 10.4-33.4%) in furnished cage systems, and 25.9% (95% CI: 15.6- 36.2%) in non-cage systems. Findings suggest that factors most associated with FD include increased age, lack of foraging opportunity, brown feather colour, abnormal lighting cycle from midnight feeding, and poor air quality due to infrequent manure removal. Further investigation of these factors through longitudinal studies and intervention strategy evaluation is warranted.
Advisors/Committee Members: Berke, Olaf (advisor), Harlander, Alexandra (advisor).
Subjects/Keywords: feather damage; laying hens; welfare; feather pecking; poultry; epidemiology
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Decina, C. (2018). An Investigation of Feather Damage in Canadian Laying Hens. (Masters Thesis). University of Guelph. Retrieved from https://atrium.lib.uoguelph.ca/xmlui/handle/10214/14671
Chicago Manual of Style (16th Edition):
Decina, Caitlin. “An Investigation of Feather Damage in Canadian Laying Hens.” 2018. Masters Thesis, University of Guelph. Accessed April 18, 2021.
https://atrium.lib.uoguelph.ca/xmlui/handle/10214/14671.
MLA Handbook (7th Edition):
Decina, Caitlin. “An Investigation of Feather Damage in Canadian Laying Hens.” 2018. Web. 18 Apr 2021.
Vancouver:
Decina C. An Investigation of Feather Damage in Canadian Laying Hens. [Internet] [Masters thesis]. University of Guelph; 2018. [cited 2021 Apr 18].
Available from: https://atrium.lib.uoguelph.ca/xmlui/handle/10214/14671.
Council of Science Editors:
Decina C. An Investigation of Feather Damage in Canadian Laying Hens. [Masters Thesis]. University of Guelph; 2018. Available from: https://atrium.lib.uoguelph.ca/xmlui/handle/10214/14671

University of Guelph
18.
Birkl, Patrick.
Feather Pecking and Tryptophan Metabolism in Laying Hens.
Degree: PhD, Department of Animal Biosciences, 2020, University of Guelph
URL: https://atrium.lib.uoguelph.ca/xmlui/handle/10214/17812
► Feather pecking (FP) in laying hens is one of the greatest welfare issues in the husbandry of chickens kept for egg-laying. FP may result in…
(more)
▼ Feather pecking (FP) in
laying hens is one of the greatest welfare issues in the husbandry of chickens kept for egg-
laying. FP may result in severe feather damage or cannibalism, which can increase flock mortality. FP behaviour, mostly described as gentle or severe, is affected by multiple internal and external factors, but the biological mechanisms that regulate the development and continuation of FP are poorly understood. While tryptophan (TRP) metabolism has been hypothesized to impact FP, nutritional manipulation of plasma TRP using acute tryptophan depletion (ATD) for studying changes in pecking behaviour in a social and non-social environment has not been explored, to the best of our knowledge. Further, the influence of the social environment on the plasma TRP metabolism, along the kynurenine (KYN) pathway and FP, has not been considered. To manipulate TRP metabolism, we developed a nutritional, non-invasive ATD treatment for
laying hens. The effect of ATD on gentle and severe FP in a social environment, as well as on pecking in an operant chamber, was evaluated. Disrupting social structures was utilized to observe any alterations in gentle and severe FP, and blood TRP metabolites along the KYN pathway. The results of this thesis indicate that ATD in
laying hens reduces plasma TRP levels and increases pecking activity in a social (gentle FP) and non-social (operant pecking) environment. Furthermore, disrupting social structures has been found to lower KYN/TRP ratios and increase the likelihood of FP (gentle and severe merged). These findings indicate that even acute TRP metabolism-manipulation may impact pecking behaviour, and that the KYN pathway of TRP metabolism could help broaden our understanding of the biological mechanisms behind FP.
Advisors/Committee Members: Harlander, Alexandra (advisor).
Subjects/Keywords: laying hens; feather pecking; acute tryptophan depletion; kynurenine; social stress
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Birkl, P. (2020). Feather Pecking and Tryptophan Metabolism in Laying Hens. (Doctoral Dissertation). University of Guelph. Retrieved from https://atrium.lib.uoguelph.ca/xmlui/handle/10214/17812
Chicago Manual of Style (16th Edition):
Birkl, Patrick. “Feather Pecking and Tryptophan Metabolism in Laying Hens.” 2020. Doctoral Dissertation, University of Guelph. Accessed April 18, 2021.
https://atrium.lib.uoguelph.ca/xmlui/handle/10214/17812.
MLA Handbook (7th Edition):
Birkl, Patrick. “Feather Pecking and Tryptophan Metabolism in Laying Hens.” 2020. Web. 18 Apr 2021.
Vancouver:
Birkl P. Feather Pecking and Tryptophan Metabolism in Laying Hens. [Internet] [Doctoral dissertation]. University of Guelph; 2020. [cited 2021 Apr 18].
Available from: https://atrium.lib.uoguelph.ca/xmlui/handle/10214/17812.
Council of Science Editors:
Birkl P. Feather Pecking and Tryptophan Metabolism in Laying Hens. [Doctoral Dissertation]. University of Guelph; 2020. Available from: https://atrium.lib.uoguelph.ca/xmlui/handle/10214/17812

Massey University
19.
Swan, Stephen Edgar James.
Some economic and nutritional aspects of different grower and layer rations in egg production : a thesis presented in partial fulfilment of the requirements for the degree Master of Agricultural Science in Animal Science at Massey University
.
Degree: 1970, Massey University
URL: http://hdl.handle.net/10179/5047
► Preface: Chapter One of this thesis presents background information on the rearing of laying pullets and describes an experiment evaluating a series of rearing rations…
(more)
▼ Preface: Chapter One of this thesis presents background information on the rearing of laying pullets and describes an experiment evaluating a series of rearing rations (with continuous variation of the levels of three major ingredients) in terms of overall profitability. Chapter Two looks particularly at the layer phase, and considers possibilities of reducing feed costs in this phase. An experiment evaluates a series of layer rations (with continuous variation of the levels of three major ingredients) in terms of overall profitability. The final chapter presents an appraisal of the methods available for economic analysis of livestock rations, and discusses the problems associated with their application in layer nutrition. A profit function is suggested as a means of economic evaluation.
Subjects/Keywords: Poultry;
Laying hens;
Egg production
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Swan, S. E. J. (1970). Some economic and nutritional aspects of different grower and layer rations in egg production : a thesis presented in partial fulfilment of the requirements for the degree Master of Agricultural Science in Animal Science at Massey University
. (Thesis). Massey University. Retrieved from http://hdl.handle.net/10179/5047
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Swan, Stephen Edgar James. “Some economic and nutritional aspects of different grower and layer rations in egg production : a thesis presented in partial fulfilment of the requirements for the degree Master of Agricultural Science in Animal Science at Massey University
.” 1970. Thesis, Massey University. Accessed April 18, 2021.
http://hdl.handle.net/10179/5047.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Swan, Stephen Edgar James. “Some economic and nutritional aspects of different grower and layer rations in egg production : a thesis presented in partial fulfilment of the requirements for the degree Master of Agricultural Science in Animal Science at Massey University
.” 1970. Web. 18 Apr 2021.
Vancouver:
Swan SEJ. Some economic and nutritional aspects of different grower and layer rations in egg production : a thesis presented in partial fulfilment of the requirements for the degree Master of Agricultural Science in Animal Science at Massey University
. [Internet] [Thesis]. Massey University; 1970. [cited 2021 Apr 18].
Available from: http://hdl.handle.net/10179/5047.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Swan SEJ. Some economic and nutritional aspects of different grower and layer rations in egg production : a thesis presented in partial fulfilment of the requirements for the degree Master of Agricultural Science in Animal Science at Massey University
. [Thesis]. Massey University; 1970. Available from: http://hdl.handle.net/10179/5047
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Guelph
20.
Hanlon, Charlene.
Has the genetic selection of commercial layers impacted the control of the reproductive axis?.
Degree: PhD, Department of Animal Biosciences, 2020, University of Guelph
URL: https://atrium.lib.uoguelph.ca/xmlui/handle/10214/21148
► In the laying hen, intensive genetic selection for earlier sexual maturation and laying persistency has led to rapid improvements in reproductive capacity. While literature demonstrates…
(more)
▼ In the
laying hen, intensive genetic selection for earlier sexual maturation and
laying persistency has led to rapid improvements in reproductive capacity. While literature demonstrates that layers require photostimulation to initiate maturation, recent evidence has reported modern commercial
hens entering lay without this stimulatory cue. Additional cues under consideration include metabolic influences, with body weight (BW) believed to influence the hypothalamic-pituitary gonadal (HPG)-axis during maturation. In terms of persistent lay, skeletal health must be considered due to its association with reproductive capacity. Therefore, this thesis aims to provide novel insights into the integration of cues responsible for the activation of the HPG-axis and, determine physiological alterations resulting in sustained production rates. To study these effects, three strains of
laying hens, Lohmann LSL-lite as the modern commercial strain, heritage Shaver white-leghorns as the 2000s-commercial equivalent, and white-leghorn derived Smoky Joe as the 1960s-commercial equivalent, were used. Results demonstrated an earlier pituitary sensitivity to stimulatory neuropeptides in the modern
hens, along with an earlier rise in estradiol (E2) and age of first egg (AFE). Meanwhile, the non-selected strain demonstrated a delayed AFE and initial rise in E2. Interestingly, regardless of strain, age or photostimulation, all
hens laid their first egg within a 64-g BW window. Furthermore, five recurrent elevations in E2 were observed in modern
hens, possibly contributing to their sustained high rate of production. We also demonstrated a correlation between orexigenic peptides, responsible for stimulating feed intake, during the period of maturation in Lohmann and Shavers, but not in Smoky Joes. Finally, cortical and medullary bone mineral density were not altered by earlier AFE or persistent lay, as density was maintained in all strains regardless of cumulative production. In conclusion, this thesis provides critical revisions of the HPG-axis throughout the
laying cycle in modern commercial layers. This knowledge aims to improve management guidelines, as BW must be considered in the pullet phase to synchronize metabolic and photostimulatory triggers, optimizing entry into lay. This study is the first to consider the effects of persistent lay from the standpoint of three different strains of layers, highlighting alterations of the HPG-axis which make this possible.
Advisors/Committee Members: Bedecarrats, Gregoy (advisor).
Subjects/Keywords: Laying Hens; Reproduction; Endocrinology; Estradiol; Metabolism; Bone Quality
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Hanlon, C. (2020). Has the genetic selection of commercial layers impacted the control of the reproductive axis?. (Doctoral Dissertation). University of Guelph. Retrieved from https://atrium.lib.uoguelph.ca/xmlui/handle/10214/21148
Chicago Manual of Style (16th Edition):
Hanlon, Charlene. “Has the genetic selection of commercial layers impacted the control of the reproductive axis?.” 2020. Doctoral Dissertation, University of Guelph. Accessed April 18, 2021.
https://atrium.lib.uoguelph.ca/xmlui/handle/10214/21148.
MLA Handbook (7th Edition):
Hanlon, Charlene. “Has the genetic selection of commercial layers impacted the control of the reproductive axis?.” 2020. Web. 18 Apr 2021.
Vancouver:
Hanlon C. Has the genetic selection of commercial layers impacted the control of the reproductive axis?. [Internet] [Doctoral dissertation]. University of Guelph; 2020. [cited 2021 Apr 18].
Available from: https://atrium.lib.uoguelph.ca/xmlui/handle/10214/21148.
Council of Science Editors:
Hanlon C. Has the genetic selection of commercial layers impacted the control of the reproductive axis?. [Doctoral Dissertation]. University of Guelph; 2020. Available from: https://atrium.lib.uoguelph.ca/xmlui/handle/10214/21148

University of Sydney
21.
Hartcher, Kate Mary.
Severe feather-pecking in free-range ISA Brown laying hens
.
Degree: 2015, University of Sydney
URL: http://hdl.handle.net/2123/14882
► Severe feather-pecking (SFP) is a multifactorial behaviour whereby birds peck at and pull out the feathers of conspecifics. It can result in extensive feather loss,…
(more)
▼ Severe feather-pecking (SFP) is a multifactorial behaviour whereby birds peck at and pull out the feathers of conspecifics. It can result in extensive feather loss, wounds, and death in affected birds. Many causal factors have been identified in contributing to the expression of SFP, yet the underlying motivations for the behaviour are not fully understood. Despite over five decades of research, SFP persists as a highly deleterious and prevalent problem in the egg industry worldwide, with no effective method of control. SFP can occur at extremely high rates, with studies reporting between half and three-quarters of flocks surveyed as affected. SFP therefore represents a significant risk to hen welfare. In the last half century, increased intensification of animal production has taken place. Concurrently over recent years, there has been an increase in non-cage housing systems for laying hens. Since SFP is thought to be socially transmitted throughout a flock, it has been found to be particularly difficult to control in non-cage systems. SFP is thought to be inversely correlated with use of the outdoor range area, although few studies have investigated this relationship and factors which affect range use. Research to investigate why SFP occurs, and how it may be managed, is critical for the future of the egg industry, as well as hen welfare. Some research suggests that SFP is an abnormal behaviour, and may be used as an animal model for obsessive compulsive disorder in humans. Other studies hypothesise that it is triggered by the inhibition of ground-pecking, a foraging behaviour. Still others suggest that SFP has a nutritional basis, and is primarily performed with the intent to ingest feathers. Fearfulness is thought to play a role in the expression of SFP, but the causal relationship has not been determined, as well as whether the recipients or those performing SFP are more fearful. It is also not clear whether the gentle form of feather-pecking (GFP), which does not cause damage to the birds, acts as a precursor to SFP later in life. SFP has been widely controlled by beak-trimming (BT), whereby the tip of the beak is removed. BT does not address the cause of the behaviour, and is the subject of controversy and banned in a number of countries due to welfare reasons. Its effectiveness has also been questioned. There is a need for research to investigate the current need for BT, and potential alternatives. Chapter 1 gives a general introduction to the topics covered in this thesis. Chapter 2 provides a consolidated review of the research on the motivational basis for SFP, how SFP is affected by the environment, and how feeding behaviour and feather-eating are implicated. It was concluded in chapter 2 that more research should be conducted to investigate types of environmental enrichment (EE) that may enhance foraging behaviours as a method to reduce SFP. In addition, research is required on individual bird variation, and the underlying behavioural characteristics related to the expression of SFP. Further, while…
Subjects/Keywords: Welfare;
Laying hens;
Feather pecking;
Behaviour;
Free Range;
Plumage Damage
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Hartcher, K. M. (2015). Severe feather-pecking in free-range ISA Brown laying hens
. (Thesis). University of Sydney. Retrieved from http://hdl.handle.net/2123/14882
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Hartcher, Kate Mary. “Severe feather-pecking in free-range ISA Brown laying hens
.” 2015. Thesis, University of Sydney. Accessed April 18, 2021.
http://hdl.handle.net/2123/14882.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Hartcher, Kate Mary. “Severe feather-pecking in free-range ISA Brown laying hens
.” 2015. Web. 18 Apr 2021.
Vancouver:
Hartcher KM. Severe feather-pecking in free-range ISA Brown laying hens
. [Internet] [Thesis]. University of Sydney; 2015. [cited 2021 Apr 18].
Available from: http://hdl.handle.net/2123/14882.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Hartcher KM. Severe feather-pecking in free-range ISA Brown laying hens
. [Thesis]. University of Sydney; 2015. Available from: http://hdl.handle.net/2123/14882
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Penn State University
22.
Rogers, Erica Morgan.
PENNSYLVANIA POULTRY MANURE MASS, NUTRIENT CONCENTRATIONS, AND NUTRIENTS PER BIRD IN THE CHESAPEAKE BAY WATERSHED.
Degree: 2017, Penn State University
URL: https://submit-etda.libraries.psu.edu/catalog/14823emr19
► Pennsylvania has a very diverse poultry industry with species including laying pullets and hens, broilers, turkeys, and both broiler and layer breeders. A significant portion…
(more)
▼ Pennsylvania has a very diverse poultry industry with species including
laying pullets and
hens, broilers, turkeys, and both broiler and layer breeders. A significant portion of the litter and manure produced by these birds are used as a fertilizer source for crops. Poultry litter and manure are nutrient rich, which is desirable for crop nutrient uptake, however, concern is being raised about excess nutrients entering the Chesapeake Bay (CB). Specifically, there is concern with field runoff of nitrogen (N) and phosphorus (P) desired from the field applications of poultry manure and litter. In 2010, the United States Environmental Protection Agency introduced the CB Total Maximum Daily Load (TMDL), which acts a nutrient “diet” for the bay with annual allotments of 84.3 million, 5.67 million, and 2.9 billion kg of N, P, and sediment, respectfully, to help reduce excess nutrients. In order to attain these allotments, poultry producers are implementing best management practices (BMPs) to reduce potential pollution from their farms. Unfortunately, the poultry data being cited in the TMDL is from the 2005 ASABE Standards and much of this raw data is from the 1990s. The result is that poultry producers are continuing to be penalized for inaccurate data. Additionally, due to welfare driven consumers, newer management styles are being utilized within the industry. Therefore, five field studies were implemented to measure manure nutrients and manure production from common
laying pullets and
hens, broiler, turkey, and broiler and layer breeder management styles. Pullet and
laying hen manure P2O5 was lower than previous studies and had lower moisture. Broiler litter was lower in total-N, P2O5, and K2O compared to studies from the 1990s and litter production and P2O5 were lower in turkeys than previous literature values would indicate. Finally, broiler breeders utilized nutrients on a body weight basis more effectively than layer breeders. It is imperative these current study values are implemented into the CB TMDL so regulations are based off of accurate data for those that must adhere to these regulations.
Advisors/Committee Members: Dr. Paul Patterson, Thesis Advisor/Co-Advisor, Dr. R. Michael Hulet, Committee Member, Dr. Douglas Beegle, Committee Member.
Subjects/Keywords: Chesapeake Bay TMDL; Poultry Manure; Poultry Litter; Manure Nutrients; Litter Nutrients; Laying Pullets; Laying Hens; Broilers; Turkeys; Layer and Broiler Breeders
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Rogers, E. M. (2017). PENNSYLVANIA POULTRY MANURE MASS, NUTRIENT CONCENTRATIONS, AND NUTRIENTS PER BIRD IN THE CHESAPEAKE BAY WATERSHED. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/14823emr19
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Rogers, Erica Morgan. “PENNSYLVANIA POULTRY MANURE MASS, NUTRIENT CONCENTRATIONS, AND NUTRIENTS PER BIRD IN THE CHESAPEAKE BAY WATERSHED.” 2017. Thesis, Penn State University. Accessed April 18, 2021.
https://submit-etda.libraries.psu.edu/catalog/14823emr19.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Rogers, Erica Morgan. “PENNSYLVANIA POULTRY MANURE MASS, NUTRIENT CONCENTRATIONS, AND NUTRIENTS PER BIRD IN THE CHESAPEAKE BAY WATERSHED.” 2017. Web. 18 Apr 2021.
Vancouver:
Rogers EM. PENNSYLVANIA POULTRY MANURE MASS, NUTRIENT CONCENTRATIONS, AND NUTRIENTS PER BIRD IN THE CHESAPEAKE BAY WATERSHED. [Internet] [Thesis]. Penn State University; 2017. [cited 2021 Apr 18].
Available from: https://submit-etda.libraries.psu.edu/catalog/14823emr19.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Rogers EM. PENNSYLVANIA POULTRY MANURE MASS, NUTRIENT CONCENTRATIONS, AND NUTRIENTS PER BIRD IN THE CHESAPEAKE BAY WATERSHED. [Thesis]. Penn State University; 2017. Available from: https://submit-etda.libraries.psu.edu/catalog/14823emr19
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
23.
Pasquoal Carrazzoni de Menezes.
Influência da densidade populacional em aves poedeiras nos aspectos zootécnicos e econômicos.
Degree: 2007, Universidade Federal Rural de Pernambuco
URL: http://200.17.137.108/tde_busca/arquivo.php?codArquivo=1063
► Esta pesquisa foi realizada com o objetivo de estudar a densidade populacional em poedeiras e sua influência nos aspectos zootécnicos e econômicos. Foram alojadas 264…
(more)
▼ Esta pesquisa foi realizada com o objetivo de estudar a densidade populacional em poedeiras e sua influência nos aspectos zootécnicos e econômicos. Foram alojadas 264 poedeiras em gaiolas com dimensões de 100 cm x 50 cm x 40 cm em delineamento inteiramente casualizado, com quatro grupos distribuídos em esquema fatorial 4 x 4, com 8, 10, 12 e 14 aves, correspondendo a 625, 500, 416,6 e 357,14 cm2/ave. As características avaliadas foram: produção de ovos, peso médio dos ovos, consumo de ração, massa dos ovos, conversão alimentar por dúzia e ovos não conformes. Os resultados mostraram efeitos significativos da densidade na gaiola apenas para o ovo tipo extra e segunda e na produção diária dos ovos tipo segunda, não influenciando nas demais variáveis estudadas. Baseados em nossos resultados concluímos que para poedeiras da linhagem Dekalb White, a utilização de gaiolas com a densidade populacional de 625, 500, 416,6 e 357,14 cm2/ave na fase de produção não prejudicam os parâmetros de qualidade sob os aspectos zootécnico e econômico.
This research was accomplished with the objective of studying the population density in laying and her influence in the aspects zootecnics and economical. 264 laying were housed in cages with dimensions of 100 cm x 50 cm x 40 cm in delineament entirely casualizado, with four groups distributed in factorial outline 4x4, with 8, 10, 12 and 14 birds, corresponding to 625, 500, 416,6 and 357,14 cm2/ave. The appraised characteristics were: production of eggs, medium weight of the eggs, ration consumption, mass of the eggs, alimentary conversion for dozen and eggs doesn t conform. Our results just showed significant effects of the density in the cage for the egg extra type and second and in the daily production of the eggs type second, not influencing in the other studied variables. Based on our results ended that for laying of the lineage Dekalb White, the use of cages with the population density of 625, 500, 416,6 and 357,14 cm2/ave in the production phase don t harm the quality parameters under the aspects zootecnic and economical.
Advisors/Committee Members: Lúcio Esmeraldo Honorio de Melo, Evilda Rodrigues de Lima, Joaquim Evêncio Neto, Mário Martins Menezes.
Subjects/Keywords: Ovos; Densidade Populacional; Poedeiras; Aves; MEDICINA VETERINARIA; Population density; Performance; Cage; Laying hens
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Menezes, P. C. d. (2007). Influência da densidade populacional em aves poedeiras nos aspectos zootécnicos e econômicos. (Thesis). Universidade Federal Rural de Pernambuco. Retrieved from http://200.17.137.108/tde_busca/arquivo.php?codArquivo=1063
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Menezes, Pasquoal Carrazzoni de. “Influência da densidade populacional em aves poedeiras nos aspectos zootécnicos e econômicos.” 2007. Thesis, Universidade Federal Rural de Pernambuco. Accessed April 18, 2021.
http://200.17.137.108/tde_busca/arquivo.php?codArquivo=1063.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Menezes, Pasquoal Carrazzoni de. “Influência da densidade populacional em aves poedeiras nos aspectos zootécnicos e econômicos.” 2007. Web. 18 Apr 2021.
Vancouver:
Menezes PCd. Influência da densidade populacional em aves poedeiras nos aspectos zootécnicos e econômicos. [Internet] [Thesis]. Universidade Federal Rural de Pernambuco; 2007. [cited 2021 Apr 18].
Available from: http://200.17.137.108/tde_busca/arquivo.php?codArquivo=1063.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Menezes PCd. Influência da densidade populacional em aves poedeiras nos aspectos zootécnicos e econômicos. [Thesis]. Universidade Federal Rural de Pernambuco; 2007. Available from: http://200.17.137.108/tde_busca/arquivo.php?codArquivo=1063
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
24.
MÃrcia Antonia Bartolomeu Agustini.
NÃveis nutricionais de treonina digestÃvel para poedeiras semipesadas.
Degree: 2010, Universidade Estadual do Oeste do Parana
URL: http://tede.unioeste.br/tede//tde_busca/arquivo.php?codArquivo=731
► Com o objetivo de determinar a exigÃncia nutricional de treonina digestÃvel para poedeiras semipesadas no perÃodo de 50 a 66 e 75 a 90 semanas…
(more)
▼ Com o objetivo de determinar a exigÃncia nutricional de treonina digestÃvel para poedeiras semipesadas no perÃodo de 50 a 66 e 75 a 90 semanas de idade, dois experimentos foram conduzidos no NÃcleo de EstaÃÃes Experimentais da Universidade TecnolÃgica Federal do ParanÃ, campus Dois Vizinhos. Para este fim, foram utilizadas 150 poedeiras Shaver Brown semipesadas num delineamento inteiramente casualizado (DIC) submetidas à uma raÃÃo basal contendo 2.850 Kcal EM/Kg, 15,4% de PB, suplementada com 0,460, 0,490, 0,520, 0,550 e 0,580% de L-treonina digestÃvel (98%), que forneceu 0,000; 0,027; 0,058; 0,089 e 0,120% de treonina digestÃvel, respectivamente. Os parÃmetros avaliados foram o consumo de raÃÃo, consumo de treonina, conversÃo alimentar/dÃzia de ovos, conversÃo alimentar/massa de ovos, peso de ovos, massa de ovos, porcentagem dos componentes dos ovos (gema, casca, albÃmen, espessura de casca e peso da casca por unidade de superfÃcie de Ãrea - PCSA), qualidade interna dos ovos (unidade Haugh, Ãndice de gema e Ãndice de albÃmen) e gravidade especÃfica. No experimento 1, a exigÃncia de treonina digestÃvel foi de 0,520% na raÃÃo, que corresponde a 601 mg de treonina/ave/dia. No experimento 2, para proporcionar os melhores resultados de desempenho e de qualidade de ovos, as poedeiras nÃo exigem mais que 0,525% de treonina digestÃvel, para um consumo de 654,86 mg de treonina digestÃvel/ave/dia
With the objective of determining the requirement of digestible threonine for laying hens from 50 to 66 and 75 to 90 weeks of age, two experiments were conducted at the Center for Experimental Stations of the Federal Technological University of ParanÃ, Campus Dois Vizinhos. A total of 150 Brown Shaver hens semiheavily a completely randomized design (CRD) submitted to a basal diet containing 2850 kcal / kg, 15.4% CP supplemented with 0.460, 0.490, 0.520, 0.550 and 0.580% of L-threonine (98%), which provided 0.000, 0.027, 0.058, 0.089 and 0.120% of threonine, respectively. The parameters evaluated were feed intake, threonine intake, feed/dozen eggs, feed/egg mass, egg weight, egg mass, percentage of egg components (yolk, shell, albumen, shell thickness and shell weight per unit surface area - PCSA), internal egg quality (Haugh unit, yolk index and albumen index) and specific gravity. In experiment 1, the requirement for threonine was, 520% in the diet, corresponding to 601 mg threonine/hen/day. In experiment 2, to provide the best performance and quality of eggs, hens do not require more than 0.525% of threonine, a consumption of 654.86 mg of threonine/bird/day
Advisors/Committee Members: Christiane Garcia Vilela Nunes, Sabrina Endo Takahashi, Alice Eiko Murakami, Ricardo Vianna Nunes.
Subjects/Keywords: ZOOTECNIA; aminoÃcido digestÃvel; aves de postura; desempenho; digestible amino acid; laying hens; performance
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Agustini, M. A. B. (2010). NÃveis nutricionais de treonina digestÃvel para poedeiras semipesadas. (Thesis). Universidade Estadual do Oeste do Parana. Retrieved from http://tede.unioeste.br/tede//tde_busca/arquivo.php?codArquivo=731
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Agustini, MÃrcia Antonia Bartolomeu. “NÃveis nutricionais de treonina digestÃvel para poedeiras semipesadas.” 2010. Thesis, Universidade Estadual do Oeste do Parana. Accessed April 18, 2021.
http://tede.unioeste.br/tede//tde_busca/arquivo.php?codArquivo=731.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Agustini, MÃrcia Antonia Bartolomeu. “NÃveis nutricionais de treonina digestÃvel para poedeiras semipesadas.” 2010. Web. 18 Apr 2021.
Vancouver:
Agustini MAB. NÃveis nutricionais de treonina digestÃvel para poedeiras semipesadas. [Internet] [Thesis]. Universidade Estadual do Oeste do Parana; 2010. [cited 2021 Apr 18].
Available from: http://tede.unioeste.br/tede//tde_busca/arquivo.php?codArquivo=731.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Agustini MAB. NÃveis nutricionais de treonina digestÃvel para poedeiras semipesadas. [Thesis]. Universidade Estadual do Oeste do Parana; 2010. Available from: http://tede.unioeste.br/tede//tde_busca/arquivo.php?codArquivo=731
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Aristotle University Of Thessaloniki (AUTH); Αριστοτέλειο Πανεπιστήμιο Θεσσαλονίκης (ΑΠΘ)
25.
Chalvatzi, Sofia.
Μελέτη της επίδρασης του επεξεργασμένου ατταπουλγίτη στις αποδόσεις αυγοπαραγωγών ορνίθων κατά τα στάδια ανάθρεψης-ανάπτυξης-ωοτοκίας μετά από προσθήκη του στην τροφή τους.
Degree: 2015, Aristotle University Of Thessaloniki (AUTH); Αριστοτέλειο Πανεπιστήμιο Θεσσαλονίκης (ΑΠΘ)
URL: http://hdl.handle.net/10442/hedi/40881
► The objective of the present study was to investigate the effect of modified attapulgite on laying pullets growth as well as their subsequent laying performance…
(more)
▼ The objective of the present study was to investigate the effect of modified attapulgite on laying pullets growth as well as their subsequent laying performance and egg quality. An initial flock of 432 day old Hy-Line Brown chickens were equally allocated in two dietary treatments (4 replicates of 54 chicks/treatment): (i) control and (ii) 0.5% attapulgite. Birds were raised in deep litter floor pens, under the same housing conditions, until the age of 18 weeks. Body weight, flock uniformity, feed intake, feed conversion ratio, bone quality characteristics and intestinal mucosal morphology of birds were estimated throughout this period. At the end of the 18th week 98 pullets per group were randomly selected and allocated in the following four groups CC, CA, AA, AC. The first two and the last two groups consisted of birds originating from group C and A respectively. According to the experimental design i) birds of groups CC and AA kept on receiving 0% and 0.5% attapulgite respectively ii) birds of group CA started receiving the tested material during the laying period while iii) birds of group AC stopped receiving attapulgite. Birds were kept in laying cages until the end of the 63th week. Parameters like laying hen performance, body weight, egg and bone quality characteristics, excreta composition and intestinal mucosal morphology were assessed. The possible effect of modified attapulgite on feed transit time in gastrointestinal tract was also studied. Potential shifts in microbial profile, bacterial composition and counts of specific microorganisms in the caecum of laying hens were also investigated. Furthermore an in vitro study was performed to test the possible antibacterial effect of modified attapulgite against E. coli. The results showed that incorporation of modified attapulgite in the diets of laying type birds during the first 18 weeks of their life improved flock uniformity. Birds that continued receiving attapulgite during the laying period exerted an improved laying performance accompanied by higher egg quality although the feed intake was significantly lower. Application of the tested material only during the rearing-growing period or only during the laying period were less satisfactory. Moreover the presence of modified attapulgite in the gastrointestinal tract of birds not only shifted the caecal microbial profiles but also induced higher homogeneity in profiles of birds within the attapulgite group. The presence of beneficial bacteria was increased while at the same time bacteria that could compete the host for nutrients were less represented. Colonization of caecum by potential pathogens was also reduced. However the in vitro study results did not reveal a direct antibacterial effect. The observed shifts in bacterial composition of the caecum are considered to be linked with the improved performance of birds. Given that the establishment of intestinal microflora takes place in the first weeks of a bird's life, the incorporation of modified attapulgite in the diet is suggested to start as soon as…
Subjects/Keywords: Τροποποιμένος ατταπουλγίτης; Αυγοπαραγωγές όρνιθες; Αποδόσεις; Εντερική μικροχλωρίδα; Modified attapulgite; Intestinal microbiota; Laying hens; Performance
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Chalvatzi, S. (2015). Μελέτη της επίδρασης του επεξεργασμένου ατταπουλγίτη στις αποδόσεις αυγοπαραγωγών ορνίθων κατά τα στάδια ανάθρεψης-ανάπτυξης-ωοτοκίας μετά από προσθήκη του στην τροφή τους. (Thesis). Aristotle University Of Thessaloniki (AUTH); Αριστοτέλειο Πανεπιστήμιο Θεσσαλονίκης (ΑΠΘ). Retrieved from http://hdl.handle.net/10442/hedi/40881
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Chalvatzi, Sofia. “Μελέτη της επίδρασης του επεξεργασμένου ατταπουλγίτη στις αποδόσεις αυγοπαραγωγών ορνίθων κατά τα στάδια ανάθρεψης-ανάπτυξης-ωοτοκίας μετά από προσθήκη του στην τροφή τους.” 2015. Thesis, Aristotle University Of Thessaloniki (AUTH); Αριστοτέλειο Πανεπιστήμιο Θεσσαλονίκης (ΑΠΘ). Accessed April 18, 2021.
http://hdl.handle.net/10442/hedi/40881.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Chalvatzi, Sofia. “Μελέτη της επίδρασης του επεξεργασμένου ατταπουλγίτη στις αποδόσεις αυγοπαραγωγών ορνίθων κατά τα στάδια ανάθρεψης-ανάπτυξης-ωοτοκίας μετά από προσθήκη του στην τροφή τους.” 2015. Web. 18 Apr 2021.
Vancouver:
Chalvatzi S. Μελέτη της επίδρασης του επεξεργασμένου ατταπουλγίτη στις αποδόσεις αυγοπαραγωγών ορνίθων κατά τα στάδια ανάθρεψης-ανάπτυξης-ωοτοκίας μετά από προσθήκη του στην τροφή τους. [Internet] [Thesis]. Aristotle University Of Thessaloniki (AUTH); Αριστοτέλειο Πανεπιστήμιο Θεσσαλονίκης (ΑΠΘ); 2015. [cited 2021 Apr 18].
Available from: http://hdl.handle.net/10442/hedi/40881.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Chalvatzi S. Μελέτη της επίδρασης του επεξεργασμένου ατταπουλγίτη στις αποδόσεις αυγοπαραγωγών ορνίθων κατά τα στάδια ανάθρεψης-ανάπτυξης-ωοτοκίας μετά από προσθήκη του στην τροφή τους. [Thesis]. Aristotle University Of Thessaloniki (AUTH); Αριστοτέλειο Πανεπιστήμιο Θεσσαλονίκης (ΑΠΘ); 2015. Available from: http://hdl.handle.net/10442/hedi/40881
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Georgia
26.
Lumpkins, Brett Stephen.
Nutritional value and use of distiller's dried grains with solubles in the feeding of poultry.
Degree: 2014, University of Georgia
URL: http://hdl.handle.net/10724/21895
► Recently, policies encouraging the production of fuel ethanol have resulted in an enormous increase in the production of “new generation” distiller’s dried grains with solubles…
(more)
▼ Recently, policies encouraging the production of fuel ethanol have resulted in an enormous increase in the production of “new generation” distiller’s dried grains with solubles (NG-DDGS). “New generation” distiller’s dried grains with
solubles refers to DDGS from modern non-beverage fuel ethanol plants, which exclusively use corn in the fermentation process. The present studies were conducted to evaluate the use of NG-DDGS in poultry diets and to determine the lysine and phosphorus
bioavailability of NG-DDGS. Based on the data, 6% NG-DDGS can safely be used in starter broiler diets, and can be increased to a 12% level during the grower and finisher periods. Six to 8% NG-DDGS can be fed in layer diets during peak production, and
once body weight and feed intake have stabilized the NG-DDGS level can be increased to 10 or 12%. The lysine and phosphorus availability of NG- DDGS was estimated to be 80% and 61%, respectively.
Subjects/Keywords: distiller\'s dried grains with solubles; broilers; laying hens; lysine; phosphorus; bioavailability
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Lumpkins, B. S. (2014). Nutritional value and use of distiller's dried grains with solubles in the feeding of poultry. (Thesis). University of Georgia. Retrieved from http://hdl.handle.net/10724/21895
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Lumpkins, Brett Stephen. “Nutritional value and use of distiller's dried grains with solubles in the feeding of poultry.” 2014. Thesis, University of Georgia. Accessed April 18, 2021.
http://hdl.handle.net/10724/21895.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Lumpkins, Brett Stephen. “Nutritional value and use of distiller's dried grains with solubles in the feeding of poultry.” 2014. Web. 18 Apr 2021.
Vancouver:
Lumpkins BS. Nutritional value and use of distiller's dried grains with solubles in the feeding of poultry. [Internet] [Thesis]. University of Georgia; 2014. [cited 2021 Apr 18].
Available from: http://hdl.handle.net/10724/21895.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Lumpkins BS. Nutritional value and use of distiller's dried grains with solubles in the feeding of poultry. [Thesis]. University of Georgia; 2014. Available from: http://hdl.handle.net/10724/21895
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Universidade Federal de Viçosa
27.
Gladstone Brumano.
Níveis de metionina+cistina digestíveis em rações para poedeiras leves, no período de 24 a 40 e de 42 a 58 semanas de idade.
Degree: 2008, Universidade Federal de Viçosa
URL: http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=1504
► Com o objetivo de determinar os níveis de aminoácidos sulfurosos digestíveis para estabelecer as relações ideais metionina+cistina/lisina em rações de poedeiras leves no período de…
(more)
▼ Com o objetivo de determinar os níveis de aminoácidos sulfurosos digestíveis para estabelecer as relações ideais metionina+cistina/lisina em rações de poedeiras leves no período de 24 a 40 (primeiro experimento) e de 42 a 58 (segundo experimento) semanas de idade, foram conduzidos dois experimentos no Setor de Avicultura do Departamento de Zootecnia da Universidade Federal de Viçosa. Em ambos os experimentos, foram utilizadas 216 aves da marca comercial Hy-Line W36, distribuídas em um delineamento em blocos casualizados com seis tratamentos, seis repetições e seis aves por unidade experimental. O nível de lisina utilizado na dieta experimental foi de 0,770% para um consumo médio esperado de 731 mg/ave/dia de lisina e de 95 g/ave/dia de ração. Os níveis de aminoácidos sulfurosos digestíveis foram obtidos a partir de uma dieta basal deficiente em metionina+ cistina digestíveis (0,65%), suplementada com 0,00; 0,05; 0,10; 0,15; 0,20 e 0,25% de DL-Metionina (99,2%), de forma a proporcionar relações metionina + cistina/lisina de 84, 91, 97, 104, 110 e 117. Cada período experimental teve duração de 16 semanas e foi subdividido em quatro subperíodos de coleta dos ovos, sendo cada um correspondente a 28 dias. Foram avaliados os parâmetros de desempenho (produção, peso e massa de ovos), de consumo alimentar (ração, metionina+cistina e lisina), de conversão alimentar (dúzia e massa de ovos), de componentes dos ovos (porcentagem de gema, de casca e de albúmen), de qualidade interna dos ovos (índice de gema e de albúmen e unidade Haugh), de ovos não comerciais, de ganho de peso, e eficiência de utilização de lisina por produção total de ovos. Este último parâmetro foi utilizado nos dois experimentos para corrigir a variação no consumo de ração e de lisina entre os tratamentos. No primeiro experimento, constatou-se efeito significativo (P<0,01) dos níveis de metionina+cistina digestíveis sobre a produção de ovos e eficiência de utilização de lisina por produção total de ovos, atingindo um platô em 0,811 e 0,772% de metionina+cistina digestíveis, respectivamente. No segundo experimento, houve efeito quadrático (P<0,05) dos níveis de metionina+cistina digestíveis sobre a produção de ovos e eficiência de utilização de lisina por produção total de ovos, ao nível de 0,826 e 0,775% de metionina+cistina digestíveis, respectivamente. O nível de metionina+cistina digestíveis considerado como exigência para poedeiras leves nos períodos de 24 a 40 e de 42 a 58 semanas de idade, com base nos parâmetros estudados, foram de 0,772% e 0,775%, que correspondem a consumos de 682 e de 708 mg/ave/dia de metionina+cistina digestíveis e relação metionina+ cistina/lisina de 100 e de 101%, respectivamente.
With the objective of determining of digestible sulfurous amino acids level to establish the ideal relationships methionine+ cystine/lysine in meals of light-weight laying hens in the period from 24 to 40 (first experiment) and 42 to 58 (second experiment) weeks of age, were conduced in the Section of Aviculture of the Zootechny Department of the…
Advisors/Committee Members: Marcelo Dias da Silva, Juarez Lopes Donzele, Júlio Maria Ribeiro Pupa, Paulo Cezar Gomes, Horácio Santiago Rostagno.
Subjects/Keywords: Aminoácidos; Exigências; Poedeiras; NUTRICAO E ALIMENTACAO ANIMAL; Amino acids; Laying hens; Nutritional requirements
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Brumano, G. (2008). Níveis de metionina+cistina digestíveis em rações para poedeiras leves, no período de 24 a 40 e de 42 a 58 semanas de idade. (Thesis). Universidade Federal de Viçosa. Retrieved from http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=1504
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Brumano, Gladstone. “Níveis de metionina+cistina digestíveis em rações para poedeiras leves, no período de 24 a 40 e de 42 a 58 semanas de idade.” 2008. Thesis, Universidade Federal de Viçosa. Accessed April 18, 2021.
http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=1504.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Brumano, Gladstone. “Níveis de metionina+cistina digestíveis em rações para poedeiras leves, no período de 24 a 40 e de 42 a 58 semanas de idade.” 2008. Web. 18 Apr 2021.
Vancouver:
Brumano G. Níveis de metionina+cistina digestíveis em rações para poedeiras leves, no período de 24 a 40 e de 42 a 58 semanas de idade. [Internet] [Thesis]. Universidade Federal de Viçosa; 2008. [cited 2021 Apr 18].
Available from: http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=1504.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Brumano G. Níveis de metionina+cistina digestíveis em rações para poedeiras leves, no período de 24 a 40 e de 42 a 58 semanas de idade. [Thesis]. Universidade Federal de Viçosa; 2008. Available from: http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=1504
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Universidade Federal de Viçosa
28.
Rodrigo Lopes de Almeida.
Níveis de cálcio e relação cálcio: fósforo disponível em rações para galinhas poedeiras leves no segundo ciclo de produção.
Degree: 2011, Universidade Federal de Viçosa
URL: http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=3247
► Objetivou-se determinar a exigência nutricional de cálcio e a melhor relação cálcio:fósforo disponível (Ca:Pd) para poedeiras leves no segundo ciclo de produção. Para isso, foi…
(more)
▼ Objetivou-se determinar a exigência nutricional de cálcio e a melhor relação cálcio:fósforo disponível (Ca:Pd) para poedeiras leves no segundo ciclo de produção. Para isso, foi conduzido um experimento no Setor de Avicultura do Departamento de Zootecnia da Universidade Federal de Viçosa com duração de 112 dias. Foram utilizadas 378 galinhas poedeiras Hy-Line W36, distribuídas em delineamento em blocos casualizados em esquema fatorial 3 x 3, composto de três níveis de cálcio (3,7; 4,0 e 4,3 %) e três relações Ca:Pd (9,76:1; 10,81:1 e 12,12:1), totalizando nove tratamentos com sete repetições e seis aves por unidade experimental. Foram avaliados os parâmetros de desempenho produtivo (produção de ovos; consumo de ração; peso e massa dos ovos; ganho de peso; conversão alimentar por dúzia e por massa dos ovos), de qualidade do ovo (porcentagem, peso e espessura de casca; gravidade específica e teores de matéria mineral, de cálcio e de fósforo na casca), de características ósseas (peso da tíbia; teores de matéria mineral, de cálcio e de fósforo na tíbia); de balanço de cálcio e fósforo (consumo de cálcio e de fósforo; teores de matéria mineral, de cálcio e de fósforo na excreta e retido pelas aves) e mortalidade. Houve interação (P<0,05) entre os níveis de cálcio e as relações Ca:Pd para conversão alimentar por massa e por dúzia de ovos. Verificou-se efeito linear (P<0,05) dos níveis de cálcio sobre a produção de ovos, que também obteve efeito (P<0,05) das relações Ca:Pd. Os níveis de cálcio também influenciaram de forma linear (P<0,05) o consumo de ração, sendo que quanto maior o teor de cálcio na ração, menor o consumo de ração pelas aves. Quanto aos parâmetros de qualidade de casca, verificou-se que o aumento dos níveis de cálcio causou aumento linear (P<0,05) sobre o peso e porcentagem de casca, sobre a gravidade específica dos ovos e sobre porcentagem e valor absoluto de matéria mineral da casca. As relações Ca:Pd não apresentaram efeito (P>0,05) sobre os parâmetros de qualidade de casca. Quanto aos parâmetros ósseos, verificou-se que o aumento dos níveis de cálcio causou aumento linear (P<0,05) sobre o peso da tíbia, sobre o valor absoluto de matéria mineral na tíbia, porcentagem e valor absoluto de cálcio na tíbia e sobre o valor absoluto de fósforo na tíbia. As relações Ca:Pd também não apresentaram efeito (P>0,05) sobre os parâmetros ósseos. Com relação ao balanço de Ca:Pd, os níveis de cálcio da ração promoveram efeito linear (P<0,05) sobre a porcentagem e valor absoluto da matéria mineral nas excretas, consumo de cálcio e de fósforo, teores de cálcio nas excretas (porcentagem e valor absoluto) e retenção de cálcio determinada em porcentagem. Quando a retenção de cálcio foi determinada em valor absoluto, não houve efeito significativo (P<0,05). Também não houve efeito (P>0,05) dos níveis de cálcio sobre a excreção e retenção de fósforo pelas aves, tanto em porcentagem, quanto em valor absoluto. As relações Ca:Pd não influenciaram (P>0,05) o consumo de cálcio pelas aves, os teores de matéria mineral e de cálcio…
Advisors/Committee Members: Horácio Santiago Rostagno, Luiz Fernando Teixeira Albino, Sérgio Luiz de Toledo Barreto, Júlio Maria Ribeiro Pupa, Paulo Cezar Gomes.
Subjects/Keywords: NUTRICAO E ALIMENTACAO ANIMAL; Exigência; Minerais; Cálcio; Fósforo; Poedeira; Requirement; Minerals; Calcium; Phosphorus; Laying hens
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Almeida, R. L. d. (2011). Níveis de cálcio e relação cálcio: fósforo disponível em rações para galinhas poedeiras leves no segundo ciclo de produção. (Thesis). Universidade Federal de Viçosa. Retrieved from http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=3247
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Almeida, Rodrigo Lopes de. “Níveis de cálcio e relação cálcio: fósforo disponível em rações para galinhas poedeiras leves no segundo ciclo de produção.” 2011. Thesis, Universidade Federal de Viçosa. Accessed April 18, 2021.
http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=3247.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Almeida, Rodrigo Lopes de. “Níveis de cálcio e relação cálcio: fósforo disponível em rações para galinhas poedeiras leves no segundo ciclo de produção.” 2011. Web. 18 Apr 2021.
Vancouver:
Almeida RLd. Níveis de cálcio e relação cálcio: fósforo disponível em rações para galinhas poedeiras leves no segundo ciclo de produção. [Internet] [Thesis]. Universidade Federal de Viçosa; 2011. [cited 2021 Apr 18].
Available from: http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=3247.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Almeida RLd. Níveis de cálcio e relação cálcio: fósforo disponível em rações para galinhas poedeiras leves no segundo ciclo de produção. [Thesis]. Universidade Federal de Viçosa; 2011. Available from: http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=3247
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Universidade Federal de Viçosa
29.
Cássia Rampini Vellasco.
Níveis de cálcio e relação cálcio/fósforo em rações para poedeiras leves de 24 a 40 semanas de idade.
Degree: 2010, Universidade Federal de Viçosa
URL: http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=3205
► Este experimento foi conduzido no setor de Avicultura do Departamento de Zootecnia, da Universidade Federal de Viçosa, objetivando-se determinar a exigência nutricional de cálcio e…
(more)
▼ Este experimento foi conduzido no setor de Avicultura do Departamento de Zootecnia, da Universidade Federal de Viçosa, objetivando-se determinar a exigência nutricional de cálcio e a melhor relação cálcio/fósforo em rações para poedeiras leves de 24 a 40 semanas de idade. Foram utilizadas 324 aves Hy-Line W-36, distribuídas em um delineamento inteiramente casualisado em esquema fatorial 3x3, composto de três níveis de cálcio (3,9; 4,2 e 4,5 %) e três relações cálcio/fósforo (9,3; 10,53 e 12,12/1) totalizando 9 tratamentos, 6 repetições e 6 aves por unidade experimental. Com exceção dos níveis de cálcio e de fósforo na ração, que foram obtidos por suplementação de calcário (50% fino e 50% grosso) e fosfato bicálcico, os demais nutrientes atenderam as recomendações preconizadas por Rostagno et al. (2005). Foram avaliados o desempenho produtivo (produção, peso e massa de ovo; ganho de peso; consumo de ração; conversão alimentar por dúzia e por massa de ovo), a qualidade do ovo (gema; albúmen; casca; espessura de casca; gravidade específica; matéria mineral, cálcio e fósforo na casca e ovos perdidos), características ósseas (peso, matéria mineral, cálcio e fósforo na tíbia), balanço de cálcio e fósforo (matéria mineral, cálcio e fósforo na excreta; consumo de cálcio; consumo de fósforo; cálcio e fósforo retido pelas aves) e mortalidade. Não houve interação (P>0,05) entre os níveis de cálcio e as relações cálcio/fósforo para nenhuma das variáveis estudadas, porém os níveis de cálcio promoveram efeito (P<0,05) sobre o peso e porcentagem da casca, cálcio na casca, ovos perdidos, consumo de cálcio e de fósforo, cálcio e fósforo na excreta, cálcio e fósforo retido. A relação cálcio/fósforo influenciou significativamente (P<0,05) o consumo de ração, ganho de peso, conversão alimentar por dúzia e por massa de ovo, consumo de cálcio e de fósforo, fósforo na excreta e fósforo retido. Para as demais variáveis não foi verificado efeito significativo nem para níveis de cálcio e nem para relação cálcio/fósforo. Rações contendo 4,5% de cálcio e relação cálcio:fósforo de 12,12:1, correspondendo a um consumo de cálcio de 3,71 g/ave/dia e de fósforo de 306 mg/ave/dia, garantem desempenho satisfatório em rações para poedeiras leves no período de 24 a 40 semanas.
This experiment was conducted in the Poultry Department of Animal Science, Federal University of Viçosa, aiming to determine the nutritional requirement for calcium and better calcium / phosphorus ratio in the diet of laying hens from 24 to 40 weeks of age. 324 birds were used Hy-Line W-36, distributed in a completely randomized design in a 3x3 factorial scheme, consisting of three levels of calcium (3.9, 4.2, and 4.5%) and three calcium: phosphorus ratio (9 , 3, and 10.53 12,12:1) totaling 9 treatments, six replicates and six birds each. With the exception of calcium and phosphorus in the diet, which were obtained by supplementation of limestone (50% thinner and 50% thicker) and dicalcium phosphate, the other nutrients met the recommendations by Rostagno et al. (2005). We…
Advisors/Committee Members: Horácio Santiago Rostagno, Juarez Lopes Donzele, Luiz Fernando Teixeira Albino, Paulo Cezar Gomes, Edwiney Sebastião Cupertino.
Subjects/Keywords: Poedeiras leves; Cálcio; Fósforo; Minerais; EXIGENCIAS NUTRICIONAIS DOS ANIMAIS; Calcium; Phosphorus; Minerals; Laying hens
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APA (6th Edition):
Vellasco, C. R. (2010). Níveis de cálcio e relação cálcio/fósforo em rações para poedeiras leves de 24 a 40 semanas de idade. (Thesis). Universidade Federal de Viçosa. Retrieved from http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=3205
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Vellasco, Cássia Rampini. “Níveis de cálcio e relação cálcio/fósforo em rações para poedeiras leves de 24 a 40 semanas de idade.” 2010. Thesis, Universidade Federal de Viçosa. Accessed April 18, 2021.
http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=3205.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Vellasco, Cássia Rampini. “Níveis de cálcio e relação cálcio/fósforo em rações para poedeiras leves de 24 a 40 semanas de idade.” 2010. Web. 18 Apr 2021.
Vancouver:
Vellasco CR. Níveis de cálcio e relação cálcio/fósforo em rações para poedeiras leves de 24 a 40 semanas de idade. [Internet] [Thesis]. Universidade Federal de Viçosa; 2010. [cited 2021 Apr 18].
Available from: http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=3205.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Vellasco CR. Níveis de cálcio e relação cálcio/fósforo em rações para poedeiras leves de 24 a 40 semanas de idade. [Thesis]. Universidade Federal de Viçosa; 2010. Available from: http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=3205
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Universidade Federal de Viçosa
30.
Arele Arlindo Calderano.
Relação triptofano:lisina em rações para poedeiras leves.
Degree: 2011, Universidade Federal de Viçosa
URL: http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=3402
► Foram realizados dois experimentos com o objetivo de determinar as relações ideais dos aminoácidos triptofano digestível:lisina digestível em rações para poedeiras leves de 24 a…
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▼ Foram realizados dois experimentos com o objetivo de determinar as relações ideais dos aminoácidos triptofano digestível:lisina digestível em rações para poedeiras leves de 24 a 40 (Experimento I) e de 42 a 58 (Experimento II) semanas de idade. Em cada experimento foram utilizadas 240 poedeiras Hy-Line W-36, distribuídas em delineamento inteiramente ao acaso, com cinco tratamentos, oito repetições e seis aves por unidade experimental. Ao completarem 24 e 42 semanas de idade as aves foram submetidas aos tratamentos experimentais que consistiram de rações isonutritivas, exceto para os níveis de triptofano digestível. No experimento I os níveis de triptofano digestível nas rações foram 0,157; 0,168; 0,179; 0,190 e 0,201%, proporcionando relações triptofano digestível:lisina digestível de 21,5; 23,0; 24,5; 26,0 e 27,5 respectivamente. Foi utilizado um nível subótimo de lisina digestível nas rações de 0,730%. No experimento II os níveis de triptofano digestível nas rações foram 0,149; 0,160; 0,171; 0,182 e 0,193%, proporcionando relações triptofano digestível:lisina digestível de 21,5; 23,1; 24,6; 26,2 e 27,8 respectivamente. Foi utilizado um nível sub ótimo de lisina digestível nas rações de 0,694%. Em ambos os experimentos os seguintes parâmetros foram avaliados: consumo alimentar (ração, triptofano digestível e lisina digestível), porcentagem de postura, peso dos ovos, massa de ovos, conversão alimentar (dúzia e massa de ovos), eficiência de utilização de lisina digestível (massa e número de ovos), porcentagem dos componentes dos ovos, ganho de peso e balanço de nitrogênio. No experimento I houve efeito linear dos níveis de triptofano digestível sobre o consumo de ração, de triptofano digestível e de lisina digestível, a porcentagem de postura, a massa de ovos, a conversão alimentar por massa de ovos, a eficiência de utilização de lisina por massa de ovos e o ganho de peso. Também foi observado efeito quadrático sobre o peso dos ovos. Para a eficiência de utilização de lisina por massa de ovos houve melhor ajuste dos dados ao modelo LRP, sendo obtida menor soma de quadrado dos desvios. O nível de triptofano digestível na dieta a partir do qual ocorreu o platô foi de 0,184%. Esse nível correspondeu ao consumo de 142 mg/ave/dia de triptofano digestível e a relação ideal triptofano digestível:lisina digestível de 25,2%. xi No experimento II foi observado efeito linear sobre o consumo de triptofano digestível. Houve efeito quadrático sobre a porcentagem de postura, a massa de ovos, a conversão alimentar por massa de ovos e a eficiência de utilização de lisina por massa de ovos. Para a conversão alimentar por massa de ovos foi obtido 0,178% como nível ótimo, que correspondeu ao consumo de 158 mg/ave/dia de triptofano digestível e a relação ideal triptofano digestível:lisina digestível de 25,6%. Aplicando-se o limite de confiança de 95% para a resposta da equação quadrática foi obtida a relação de 24,3%. As relações ideais triptofano digestível:lisina digestível recomendadas nas dietas para poedeiras leves de 24 a 40 e de 42…
Advisors/Committee Members: Sérgio Luiz de Toledo Barreto, Juarez Lopes Donzele, Paulo Borges Rodrigues, Edwiney Sebastião Cupertino, Priscila D Agostini de Almeida, Paulo Cezar Gomes.
Subjects/Keywords: Triptofano; Poedeiras leves; NUTRICAO E ALIMENTACAO ANIMAL; Tryptophan; Metabolizable energy; Laying hens; Energia metabolizável
Record Details
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Record Details
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Calderano, A. A. (2011). Relação triptofano:lisina em rações para poedeiras leves. (Thesis). Universidade Federal de Viçosa. Retrieved from http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=3402
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Calderano, Arele Arlindo. “Relação triptofano:lisina em rações para poedeiras leves.” 2011. Thesis, Universidade Federal de Viçosa. Accessed April 18, 2021.
http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=3402.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Calderano, Arele Arlindo. “Relação triptofano:lisina em rações para poedeiras leves.” 2011. Web. 18 Apr 2021.
Vancouver:
Calderano AA. Relação triptofano:lisina em rações para poedeiras leves. [Internet] [Thesis]. Universidade Federal de Viçosa; 2011. [cited 2021 Apr 18].
Available from: http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=3402.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Calderano AA. Relação triptofano:lisina em rações para poedeiras leves. [Thesis]. Universidade Federal de Viçosa; 2011. Available from: http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=3402
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
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