subject:(beef heifers)

Oregon State University

1. Schubach, Kelsey M. Impacts of Stocking Density on Development and Puberty Attainment of Replacement Beef Heifers.

Degree: MS, Animal Science, 2016, Oregon State University

URL: http://hdl.handle.net/1957/59743

► The following experiment presented herein compared growth, physical activity, stress-related responses, and puberty attainment in heifers reared on high- (HIDENS) or low-stocking densities (LOWDENS). Sixty… (more)

▼ The following experiment presented herein compared growth, physical activity, stress-related responses, and puberty attainment in heifers reared on high- (HIDENS) or low-stocking densities (LOWDENS). Sixty Angus x Hereford heifers were ranked by age and BW (210 ± 2 d and 220 ± 2 kg, respectively) on d 0, and assigned to: a) 1 of 3 drylot pens (10 × 14 m pens; 10 heifers/pen) resulting in a stocking density of 14 m²/heifer (HIDENS; n = 3), or b) 1 of 3 pastures (25-ha pastures; 10 heifers/pasture), resulting in a stocking density of 25,000 m²/heifer (LOWDENS; n = 3). Pastures utilized herein were harvested for hay prior to the beginning of this experiment, and negligible forage was available for grazing to LOWDENS heifers throughout the experimental period (d 0 to 182). Heifers received the same limit-fed diet during the experiment, which averaged (DM basis) 4.0 kg/heifer daily of alfalfa-grass hay and 3.0 kg/heifer daily of a corn-based concentrate. Heifer shrunk BW was recorded after 16 h of feed and water withdrawal on d -3 and d 183 for ADG calculation. On d 0, heifers were fitted with a pedometer fixed behind their right shoulder. Each week during the experiment, pedometer results were recorded and blood samples were collected for puberty evaluation via plasma progesterone. Plasma samples collected on d 0, 28, 56, 84, 112, 140, 161, and 182 were also analyzed for concentrations of cortisol and IGF-I. On d 28, 102, and 175, blood samples were also collected for RNA isolation and analysis of heat shock protein (HSP) 70 and HSP72 mRNA expression. On d 0, 49, 98, 147, and 182, hair samples were collected from the tail switch for analysis of hair cortisol concentrations. No treatment effects were detected (P = 0.66) for heifer BW or ADG. Heifers from LOWDENS had more (P < 0.01) steps/week compared with HIDENS. Heifers from LOWDENS had greater (P = 0.05) mRNA expression of HSP72, and tended (P = 0.10) to have greater mRNA expression of HSP70 compared with HIDENS. Plasma concentrations of cortisol and IGF-I were often greater (P ≤ 0.05) in LOWDENS vs. HIDENS heifers (treatment × day interaction; P < 0.01). Hair cortisol concentrations were greater (P < 0.01) for HIDENS vs. LOWDENS heifers beginning on d 98 (treatment × day interaction; P < 0.01). Heifers from HIDENS experienced delayed puberty attainment and had a lower (P < 0.01) proportion of pubertal heifers on d 182 compared with LOWDENS (treatment × day interaction; P < 0.01). In summary, HIDENS negatively impacted heifer stress-related and physiological responses, and delayed puberty attainment compared with LOWDENS. Advisors/Committee Members: Cooke, Reinaldo (advisor), Bohnert, David (committee member).

Subjects/Keywords: beef heifers; Heifers – Development

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APA (6^th Edition):

Schubach, K. M. (2016). Impacts of Stocking Density on Development and Puberty Attainment of Replacement Beef Heifers. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/59743

Chicago Manual of Style (16^th Edition):

Schubach, Kelsey M. “Impacts of Stocking Density on Development and Puberty Attainment of Replacement Beef Heifers.” 2016. Masters Thesis, Oregon State University. Accessed April 12, 2021. http://hdl.handle.net/1957/59743.

MLA Handbook (7^th Edition):

Schubach, Kelsey M. “Impacts of Stocking Density on Development and Puberty Attainment of Replacement Beef Heifers.” 2016. Web. 12 Apr 2021.

Vancouver:

Schubach KM. Impacts of Stocking Density on Development and Puberty Attainment of Replacement Beef Heifers. [Internet] [Masters thesis]. Oregon State University; 2016. [cited 2021 Apr 12]. Available from: http://hdl.handle.net/1957/59743.

Council of Science Editors:

Schubach KM. Impacts of Stocking Density on Development and Puberty Attainment of Replacement Beef Heifers. [Masters Thesis]. Oregon State University; 2016. Available from: http://hdl.handle.net/1957/59743

University of Florida

2. Bertelli Canal, Luara. The Relationship between Feed Efficiency and Fertility in Replacement Beef Heifers.

Degree: MS, Animal Sciences, 2018, University of Florida

URL: https://ufdc.ufl.edu/UFE0054124

► The objective of our study was to investigate the relationship between feed efficiency and fertility in growing heifers. One hundred and seventy-nine replacement beef heifers… (more)

Subjects/Keywords: beef – feedefficiency – fertility – heifers

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APA (6^th Edition):

Bertelli Canal, L. (2018). The Relationship between Feed Efficiency and Fertility in Replacement Beef Heifers. (Masters Thesis). University of Florida. Retrieved from https://ufdc.ufl.edu/UFE0054124

Chicago Manual of Style (16^th Edition):

Bertelli Canal, Luara. “The Relationship between Feed Efficiency and Fertility in Replacement Beef Heifers.” 2018. Masters Thesis, University of Florida. Accessed April 12, 2021. https://ufdc.ufl.edu/UFE0054124.

MLA Handbook (7^th Edition):

Bertelli Canal, Luara. “The Relationship between Feed Efficiency and Fertility in Replacement Beef Heifers.” 2018. Web. 12 Apr 2021.

Vancouver:

Bertelli Canal L. The Relationship between Feed Efficiency and Fertility in Replacement Beef Heifers. [Internet] [Masters thesis]. University of Florida; 2018. [cited 2021 Apr 12]. Available from: https://ufdc.ufl.edu/UFE0054124.

Council of Science Editors:

Bertelli Canal L. The Relationship between Feed Efficiency and Fertility in Replacement Beef Heifers. [Masters Thesis]. University of Florida; 2018. Available from: https://ufdc.ufl.edu/UFE0054124

Oregon State University

3. De Meireles Reis, Maria. Creep-feeding to stimulate metabolic imprinting in nursing beef heifers : impacts on heifer growth, reproductive, and physiological parameters.

Degree: MS, Animal Science, 2014, Oregon State University

URL: http://hdl.handle.net/1957/54611

► The following experiment presented herein compared growth, physiological, and reproductive responses of beef heifers with (MI) or without (CON) access to a creep-feeder, as a… (more)

▼ The following experiment presented herein compared growth, physiological, and reproductive responses of beef heifers with (MI) or without (CON) access to a creep-feeder, as a manner to stimulate metabolic imprinting while nursing their dams. On d 0 of the experiment, 60 Angus × Hereford heifers were ranked by initial BW and age (140 ± 3 kg and 68 ± 3 d, respectively) as well as dam age and BCS, and assigned to pairs so all ranking criteria were similar between heifers within each pair. On d 1, pairs were randomly assigned to MI (n = 15) or CON (n = 15). From d 1 to 51, MI pairs and their dams were allocated to 15 drylot pens where heifers had ad libitum access to a corn-based supplement through a creep-feeder. The CON pairs and their dams were maintained in an adjacent single drylot pen. From d 52 to 111, cattle from both treatments were managed as a single group on a semiarid range pasture. On d 111, heifers were weaned and allocated to 2 pastures according to treatment, receiving hay and a corn-based concentrate until d 326. Full BW was recorded prior to (d -1 and 0) and at the end of the creep-feeding period (d 50 and 51), whereas shrunk BW was collected on d 112 and 326. On d 0, 51, 111, 187, 261, and 325, blood was collected and real-time ultrasonography for LM depth and backfat thickness assessment was performed. Blood was also collected every 10 d from d 113 to 323 for puberty evaluation via plasma progesterone concentrations. Liver and subcutaneous fat biopsies were performed on d 51, 111, 261, and 325. Average daily gain was greater (P < 0.01) for MI than CON from d 1 to 51, tended (P = 0.09) to be greater for CON than MI from d 112 to 326, whereas BW on d 326 was similar (P = 0.87) between treatments. On d 51, MI had greater (P ≤ 0.01) plasma IGF-I and glucose concentrations, as well as mRNA expression of hepatic pyruvate carboxylase and adipose fatty acid synthase than CON. On d 261 and 325, plasma insulin concentrations were greater (P ≤ 0.03) in CON than MI. Mean mRNA expression of hepatic IGF-I and adipose peroxisome proliferator-activated receptor gamma were greater (P ≤ 0.05) in MI than CON. Heifers assigned to MI attained puberty earlier (P = 0.04) during the experiment than CON, although age and BW at puberty were similar (P ≤ 0.74) between treatments. In conclusion, supplementing nursing heifers via creep-feeding for 50 d altered physiological and biochemical parameters suggestive of a metabolic imprinting effect, but did not impact heifer age or BW at puberty. Advisors/Committee Members: Cooke, Reinaldo (advisor), Bohnert, David (committee member).

Subjects/Keywords: beef heifer; Heifers – Feeding and feeds

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APA (6^th Edition):

De Meireles Reis, M. (2014). Creep-feeding to stimulate metabolic imprinting in nursing beef heifers : impacts on heifer growth, reproductive, and physiological parameters. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/54611

Chicago Manual of Style (16^th Edition):

De Meireles Reis, Maria. “Creep-feeding to stimulate metabolic imprinting in nursing beef heifers : impacts on heifer growth, reproductive, and physiological parameters.” 2014. Masters Thesis, Oregon State University. Accessed April 12, 2021. http://hdl.handle.net/1957/54611.

MLA Handbook (7^th Edition):

De Meireles Reis, Maria. “Creep-feeding to stimulate metabolic imprinting in nursing beef heifers : impacts on heifer growth, reproductive, and physiological parameters.” 2014. Web. 12 Apr 2021.

Vancouver:

De Meireles Reis M. Creep-feeding to stimulate metabolic imprinting in nursing beef heifers : impacts on heifer growth, reproductive, and physiological parameters. [Internet] [Masters thesis]. Oregon State University; 2014. [cited 2021 Apr 12]. Available from: http://hdl.handle.net/1957/54611.

Council of Science Editors:

De Meireles Reis M. Creep-feeding to stimulate metabolic imprinting in nursing beef heifers : impacts on heifer growth, reproductive, and physiological parameters. [Masters Thesis]. Oregon State University; 2014. Available from: http://hdl.handle.net/1957/54611

University of Missouri – Columbia

4. Martin, Neal Timothy. Comparison of long-term CIDR-based protocols to synchronize estrus and ovulation prior to fixed-time artificial insemination in postpartum beef cows.

Degree: 2012, University of Missouri – Columbia

URL: http://hdl.handle.net/10355/33151

► This experiment compared two long-term CIDR-based protocols to synchronize estrus and ovulation prior to fixed-time AI (FTAI) in postpartum beef cows. Cows assigned to the… (more)

▼ This experiment compared two long-term CIDR-based protocols to synchronize estrus and ovulation prior to fixed-time AI (FTAI) in postpartum beef cows. Cows assigned to the 14-19 d CIDR-PG protocol (n = 196) received CIDR inserts (1.38 g progesterone) from d 0 to 14 and PGF2[alpha] (PG; 25 mg, i.m.) 19 d after CIDR removal on d 33. Cows assigned to the 14-16 d CIDR-PG protocol (n = 195) received CIDR inserts from d 3 to 17, and PG 16 d after CIDR removal on d 33. Cows in both treatments were artificially inseminated on d 36, 72 h after PG, with GnRH (100 [mu]g i.m.) at FTAI. Blood samples for progesterone (P4) were collected at d – 10 and d 0 to determine pretreatment estrous cyclicity status, and again at PG. Blood samples for estradiol (E2) were collected at PG and FTAI. HeatWatch estrus detection transmitters were utilized from CIDR removal until FTAI to determine onset of estrus following CIDR removal and PG. Dominant follicle diameter was determined via ultrasonagraphy at PG and FTAI. Ultrasound pregnancy diagnosis was performed 70 d after FTAI and confirmed at d 140 of gestation. Cows in both treatments had similar size dominant follicles at PG, and FTAI. Progesterone at PG was higher for 14-16 d CIDR-PG treated cows compared to 14-19 d treated cows. Mean concentrations of E2 were similar between treatments at PG, but were higher at FTAI for 14-16 d CIDR-PG treated cows. There were no differences between treatments in E2 at FTAI for cows that failed to exhibit estrus after PG. Estrous response after PG was higher for cows assigned to the 14-19 d CIDR-PG protocol. Estrous response after PG among cows [less than or equal to] 4 yr was higher for cows assigned to the 14-19 d CIDR-PG protocol, but there were no differences between treatments for cows [less than or equal to] 3 yr. There were no differences between treatments for FTAI pregnancy rate. However, pregnancy rate after FTAI among cows [greater than or equal to] 4 yr tended to be higher for cows assigned to the 14-19 d CIDR-PG protocol. In summary, both protocols worked effectively to synchronize estrus and ovulation prior to FTAI in postpartum beef cows, suggesting that a range in interval from CIDR removal to PG may be feasible when using long-term CIDR-based protocols. Higher estrous response rates after PG and improvements in FTAI pregnancy rate for 14-19 d treated cows [greater than or equal to] 4 yr of age warrants further consideration. Advisors/Committee Members: Patterson, David J. (David James), 1954- (advisor).

Subjects/Keywords: reproductive performance; estrous synchronization; beef heifers

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APA (6^th Edition):

Martin, N. T. (2012). Comparison of long-term CIDR-based protocols to synchronize estrus and ovulation prior to fixed-time artificial insemination in postpartum beef cows. (Thesis). University of Missouri – Columbia. Retrieved from http://hdl.handle.net/10355/33151

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Martin, Neal Timothy. “Comparison of long-term CIDR-based protocols to synchronize estrus and ovulation prior to fixed-time artificial insemination in postpartum beef cows.” 2012. Thesis, University of Missouri – Columbia. Accessed April 12, 2021. http://hdl.handle.net/10355/33151.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Martin, Neal Timothy. “Comparison of long-term CIDR-based protocols to synchronize estrus and ovulation prior to fixed-time artificial insemination in postpartum beef cows.” 2012. Web. 12 Apr 2021.

Vancouver:

Martin NT. Comparison of long-term CIDR-based protocols to synchronize estrus and ovulation prior to fixed-time artificial insemination in postpartum beef cows. [Internet] [Thesis]. University of Missouri – Columbia; 2012. [cited 2021 Apr 12]. Available from: http://hdl.handle.net/10355/33151.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Martin NT. Comparison of long-term CIDR-based protocols to synchronize estrus and ovulation prior to fixed-time artificial insemination in postpartum beef cows. [Thesis]. University of Missouri – Columbia; 2012. Available from: http://hdl.handle.net/10355/33151

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Pretoria

5. Holm, D.E. (Dietmar Erik). Early determination of the reproductive potential of beef heifers using reproductive tract scoring, pelvimetry and transrectal ultrasonography.

Degree: Production Animal Studies, 2013, University of Pretoria

URL: http://hdl.handle.net/2263/40281

► A series of 4 observational studies was performed on a Bovelder herd at Johannesburg Water’s Northern Farm. The heifer and cow breeding seasons started on… (more)

▼ A series of 4 observational studies was performed on a Bovelder herd at Johannesburg Water’s Northern Farm. The heifer and cow breeding seasons started on 15 October and 1 November every year, and consisted of 50 d and 60 d of oestrus observation respectively, with once daily artificial insemination (AI). Five to 7 days after the AI period bulls were added in multi-sire groups for a period of 42 d. Pregnancy diagnoses were performed between 23 March and 26 April every year. The farming system had been in place for >25 years, with few deviations. In the first study, reproductive tract scoring (RTS) by transrectal palpation on a 5- point scale was performed 1 day before the start of breeding on a group of heifers (n = 272) born in 2002. Heifers with RTS 1 or 2 were estimated to be pre-pubertal, those with RTS 3 pubertal and those with RTS 4 or 5 post-pubertal. Pre-breeding body weight (BW) and body condition score (BCS) were recorded, and Kleiber ratio (KR) was calculated (average daily gain/end weight0.75). Heifers were followed until they weaned their first calves. The objectives of this study were to determine if RTS is a valid tool to predict reproduction and production performance in limited bred beef heifers, and to compare its predictive value with that of BW, BCS, age and KR. After adjustment for BW and age, RTS was positively associated with pregnancy rate to the 50 day AI season (P < 0.01), calf weaning weight (P < 0.01) and pregnancy rate to the subsequent breeding season (P < 0.01), and negatively associated with days to calving (P < 0.01). RTS was a better predictor of fertility than was vi KR, and similar in its prediction of calf weaning weight. It was concluded that RTS is a predictor of heifer fertility and compares well with other traits used as a predictor of production outcomes. It was further hypothesised that RTS may predict long-term reproductive performance due to its association with pregnancy outcome and days to calving after first breeding, combined with reports that heifers calving early tend to calve early in subsequent seasons and have increased lifetime production. In study 2, a 7-year longitudinal study, 292 beef cows in two age cohorts were observed from 1-2 d before their first breeding season (day of RTS), until they had weaned up to 5 calves. Years to reproductive failure was defined as the number of years until a cow failed to become pregnant during the AI season. Animals with RTS 1 or 2 were at increased risk of early reproductive failure compared to those with RTS 4 or 5 (HR = 1.4, 95% CI 1.0, 1.9) despite the fact that RTS was not associated with calving rate or days to calving after the second calving season. The predictive value of RTS was lower in the age cohort with a higher prevalence of anoestrus. Most animals with RTS 1 or 2 that were subsequently detected in oestrus were in early to mid di-oestrus at the time of scoring. It was concluded that RTS is a valid culling tool to improve long-term reproductive success in a seasonal breeding… Advisors/Committee Members: Thompson, P.N. (Peter N.) (advisor), Nielen, Mirjam (coadvisor), Irons, Pete Charles (coadvisor).

Subjects/Keywords: Beef heifers; Reproductive tract score; UCTD; RTS

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APA (6^th Edition):

Holm, D. E. (. E. (2013). Early determination of the reproductive potential of beef heifers using reproductive tract scoring, pelvimetry and transrectal ultrasonography. (Doctoral Dissertation). University of Pretoria. Retrieved from http://hdl.handle.net/2263/40281

Chicago Manual of Style (16^th Edition):

Holm, D E (Dietmar Erik). “Early determination of the reproductive potential of beef heifers using reproductive tract scoring, pelvimetry and transrectal ultrasonography.” 2013. Doctoral Dissertation, University of Pretoria. Accessed April 12, 2021. http://hdl.handle.net/2263/40281.

MLA Handbook (7^th Edition):

Holm, D E (Dietmar Erik). “Early determination of the reproductive potential of beef heifers using reproductive tract scoring, pelvimetry and transrectal ultrasonography.” 2013. Web. 12 Apr 2021.

Vancouver:

Holm DE(E. Early determination of the reproductive potential of beef heifers using reproductive tract scoring, pelvimetry and transrectal ultrasonography. [Internet] [Doctoral dissertation]. University of Pretoria; 2013. [cited 2021 Apr 12]. Available from: http://hdl.handle.net/2263/40281.

Council of Science Editors:

Holm DE(E. Early determination of the reproductive potential of beef heifers using reproductive tract scoring, pelvimetry and transrectal ultrasonography. [Doctoral Dissertation]. University of Pretoria; 2013. Available from: http://hdl.handle.net/2263/40281

University of Tennessee – Knoxville

6. McFarlane, Zachary David. Low-Input Heifer Development Using Stockpiled Native Forages and Protein Supplementation.

Degree: 2018, University of Tennessee – Knoxville

URL: https://trace.tennessee.edu/utk_graddiss/4877

► Three studies were conducted to determine the effects of stockpiled winter forage species and protein supplementation strategy on heifer growth, reproductive performance, nutritional status, rumen… (more)

▼ Three studies were conducted to determine the effects of stockpiled winter forage species and protein supplementation strategy on heifer growth, reproductive performance, nutritional status, rumen fermentation, and the economic implications of forage-based heifer development. In all three studies, spring-born, beef heifers were stratified by BW and randomly assigned to 1 of 3 stockpiled forages: (1) endophyte-infected tall fescue (TF, Schedonorus arundinaceus (Schreb.) Dumort) (2) big bluestem (Andropogon gerardi Vitman) and indiangrass (Sorghastrum nutans L.) combination (BI), or (3) switchgrass (SG, Panicum virgatum L.). Forage treatments were randomly allocated to receive 1 of 2 supplement types: (1) 0.68 kg·heifer-1·d-1 of dried distiller’s grains with solubles (DDGS) or (2) 0.22 kg·heifer-1·d-1 of blood meal and fish meal (BF), resulting in a 3 × 2 factorial arrangement of treatments. Treatments were initiated in January and concluded in April at the onset of the breeding season. In Exp. 1, BW was greater (P < 0.01) for TF heifers, resulting from an increased (P < 0.01) ADG from initiation to breeding for TF heifers. From January to April, heifers grazing SG and BI pastures had a negative ADG; however, from breeding to final pregnancy diagnosis, SG and BI heifers compensated and had greater (P < 0.01) ADG than TF heifers. Pregnancy rates at fixed timed-AI and overall pregnancy rates did not differ (P ≥ 0.38) by forage or supplement treatment. In Exp. 2, heifers grazing SG pastures had greater (P = 0.04) ruminal acetate concentrations than their counterparts. However, ruminal concentrations of propionate and butyrate were not influenced (P > 0.32) by forage species. Due to an increase in ruminal acetate concentration, ruminal acetate:propionate ratio was greater (P = 0.04) for heifers grazing SG pastures. In Exp. 3, total cost of producing a heifer’s first calf using the three forage-based systems was 1,079 to 1,149/head with tall fescue (TF) being the most expensive forage-based heifer development forage system. Overall, low-input heifer development using stockpiled warm-season forages and protein supplementation may be a viable opportunity to extend the grazing season, lower production costs, and select for more efficient replacement females in the southeastern United States.

Subjects/Keywords: beef heifers; stockpiled forages; heifer development

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APA (6^th Edition):

McFarlane, Z. D. (2018). Low-Input Heifer Development Using Stockpiled Native Forages and Protein Supplementation. (Doctoral Dissertation). University of Tennessee – Knoxville. Retrieved from https://trace.tennessee.edu/utk_graddiss/4877

Chicago Manual of Style (16^th Edition):

McFarlane, Zachary David. “Low-Input Heifer Development Using Stockpiled Native Forages and Protein Supplementation.” 2018. Doctoral Dissertation, University of Tennessee – Knoxville. Accessed April 12, 2021. https://trace.tennessee.edu/utk_graddiss/4877.

MLA Handbook (7^th Edition):

McFarlane, Zachary David. “Low-Input Heifer Development Using Stockpiled Native Forages and Protein Supplementation.” 2018. Web. 12 Apr 2021.

Vancouver:

McFarlane ZD. Low-Input Heifer Development Using Stockpiled Native Forages and Protein Supplementation. [Internet] [Doctoral dissertation]. University of Tennessee – Knoxville; 2018. [cited 2021 Apr 12]. Available from: https://trace.tennessee.edu/utk_graddiss/4877.

Council of Science Editors:

McFarlane ZD. Low-Input Heifer Development Using Stockpiled Native Forages and Protein Supplementation. [Doctoral Dissertation]. University of Tennessee – Knoxville; 2018. Available from: https://trace.tennessee.edu/utk_graddiss/4877

Kansas State University

7. Smith, Maggie Jean. Factors affecting the sale price of bred heifers, bred cows, and beef bulls marketed and sold throughout the United States.

Degree: MS, Department of Animal Sciences and Industry, 2020, Kansas State University

URL: http://hdl.handle.net/2097/40640

► Within cow-calf production, the selection of a herd bull and females are important decisions for producers. Across marketing venues, potential buyers of bred females and… (more)

▼ Within cow-calf production, the selection of a herd bull and females are important decisions for producers. Across marketing venues, potential buyers of bred females and beef bulls are often provided with various informational at the time of sale. Information often includes physical descriptors, genetic factors, and management and marketing traits. The value of bred females and beef bulls may vary depending on the priorities and goals of the specific buyer. Continued research to better clarify the factors affecting sale price across breeding cattle classes may be of value to the beef cattle industry. Throughout the first chapter, a review of literature surrounding the factors affecting the sale price of bred females and beef bulls is provided. Subsequently, two studies were conducted that investigated potential factors affecting sale price. Within the second chapter, effects of various lot characteristics, physical attributes, and management traits are examined to determine their influence on the sale price of bred heifers sold from 2010 through 2018 and bred cows sold from 2011 through 2018 through video auctions. Findings suggest that multiple elements influence the sale price of bred heifers and bred cows, including auction year or time of sale, breed description, and various physical attributes. The third chapter summarizes research investigating the effect of selection indices and EPDs on the sale price of Red Angus bulls marketed and sold across the United States from 2017 through 2019. Results suggest a relationship between sale price and genetic information but indicate that other factors not captured within the data – such as physical attributes, marketing strategies, and the value of breeder reputation – may be further affecting the sale price of beef bulls. These studies further support the idea that producers consider a combination of marketing factors, physical attributes, genetic traits, and management characteristics when making selection decisions. Advisors/Committee Members: Karol E. FikeKenneth G. Odde.

Subjects/Keywords: Bred heifers; Bred cows; Beef bulls; Sale price; Beef cattle

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APA (6^th Edition):

Smith, M. J. (2020). Factors affecting the sale price of bred heifers, bred cows, and beef bulls marketed and sold throughout the United States. (Masters Thesis). Kansas State University. Retrieved from http://hdl.handle.net/2097/40640

Chicago Manual of Style (16^th Edition):

Smith, Maggie Jean. “Factors affecting the sale price of bred heifers, bred cows, and beef bulls marketed and sold throughout the United States.” 2020. Masters Thesis, Kansas State University. Accessed April 12, 2021. http://hdl.handle.net/2097/40640.

MLA Handbook (7^th Edition):

Smith, Maggie Jean. “Factors affecting the sale price of bred heifers, bred cows, and beef bulls marketed and sold throughout the United States.” 2020. Web. 12 Apr 2021.

Vancouver:

Smith MJ. Factors affecting the sale price of bred heifers, bred cows, and beef bulls marketed and sold throughout the United States. [Internet] [Masters thesis]. Kansas State University; 2020. [cited 2021 Apr 12]. Available from: http://hdl.handle.net/2097/40640.

Council of Science Editors:

Smith MJ. Factors affecting the sale price of bred heifers, bred cows, and beef bulls marketed and sold throughout the United States. [Masters Thesis]. Kansas State University; 2020. Available from: http://hdl.handle.net/2097/40640

Universidade Federal de Viçosa

8. Lívia Vieira de Barros. Estratégias de suplementação para fêmeas bovinas de corte em diferentes fases do ciclo produtivo.

Degree: 2012, Universidade Federal de Viçosa

URL: http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=4600

► This thesis was drawn from three experiments with beef heifers under different supplementation strategies at pasture. The first work aimed to evaluate productive and nutritional… (more)

▼ This thesis was drawn from three experiments with beef heifers under different supplementation strategies at pasture. The first work aimed to evaluate productive and nutritional performance of female calves fed mineral mixture or multiple supplements and milk production, pasture intake and digestibility of beef cows, in Uruchloa decumbens pastures. It was used 48 female calves with average age of 5 months and initial average weight of 125.41.34 kg and their respective dams with initial average weight of 435.2 10.3. The experimental design was the complete random design. Supplements contained approximately 25% of crude protein (CP) and progressive replacement of soybean meal (SB) by cotton seed meal 38% (CS) at the levels of 0; 33; 67 and 100% for treatments CS0, CS33, CS67 and CS100, respectively. Animals in the control treatment (CT) were fed only mineral mixture ad libitum; supplements were offered at the amount of 0.5 kg/animal/day in the other treatments. Daily gain (g) was 687.8; 733.2; 820.0; 760.6, respectively for treatments CT, CS0, CS33, CS67 and CS100. Supplemented female calves presented greater weight gain. It was not found effects of the levels of CS (P>0.10) on daily average gain. Intakes in kg/day of dry matter (DM), organic matter (OM), crude protein (CD), non fibrous carbohydrates (NFC), digested dry matter and total digestible nutrients were greater (P<0.10) for supplemented animals than for non supplemented animals. It was found a linear decreasing effect among levels of replacing SM by CS with the increasing level of CS on intake of digested dry matter and digested neutral detergent fiber. Coefficients of total apparent digestibility of DM, OM, CP and NFC were the highest (P<0.10) for supplemented animals. A decreasing linear effect on digestibility of neutral detergent fiber was found among replacing levels of SM by CS. Supplementation of female calves did not influence the performance of the cows, the milk production and dietary components by the cows (P>0.10). It is concluded that supplementation in the pre-weaning period provides a greater weight of female calves. The second work aimed to evaluate the effect of supplementation with multiple supplement or mineral mixture in the dry season (phase 1) and/or dry-rainy transition season (phase 2) on the nutritional variables and productive performance of beef cattle in Uruchloa decumbens pasture. It was used 40 40 x heifers at initial age and average weight of 8 months and 200 3.74 kg, respectively in a complete random design with four treatments and 10 replicates. In the phase 1, two groups of animals were fed multiple supplement and the other two groups were fed only mineral mixture ad libitum. In the second phase of the experiment, the two groups that received multiple supplements, one continued to receive multiple supplements and the other was receiving only mineral. For the two groups fed only mineral mixture in the phase 1, one continued receiving mineral mixture in phase 2 and the other receiving supplement in phase 2. In the phase 1,… Advisors/Committee Members: Mário Fonseca Paulino, Luciana Navajas Rennó, Mario Luiz Chizzotti, Eduardo Henrique Bevitori Kling de Moraes, Sebastião de Campos Valadares Filho.

Subjects/Keywords: Bovinos; Heifers; Supplementation; Fêmeas; NUTRICAO E ALIMENTACAO ANIMAL; Suplementação; Beef

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APA (6^th Edition):

Barros, L. V. d. (2012). Estratégias de suplementação para fêmeas bovinas de corte em diferentes fases do ciclo produtivo. (Thesis). Universidade Federal de Viçosa. Retrieved from http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=4600

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Barros, Lívia Vieira de. “Estratégias de suplementação para fêmeas bovinas de corte em diferentes fases do ciclo produtivo.” 2012. Thesis, Universidade Federal de Viçosa. Accessed April 12, 2021. http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=4600.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Barros, Lívia Vieira de. “Estratégias de suplementação para fêmeas bovinas de corte em diferentes fases do ciclo produtivo.” 2012. Web. 12 Apr 2021.

Vancouver:

Barros LVd. Estratégias de suplementação para fêmeas bovinas de corte em diferentes fases do ciclo produtivo. [Internet] [Thesis]. Universidade Federal de Viçosa; 2012. [cited 2021 Apr 12]. Available from: http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=4600.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Barros LVd. Estratégias de suplementação para fêmeas bovinas de corte em diferentes fases do ciclo produtivo. [Thesis]. Universidade Federal de Viçosa; 2012. Available from: http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=4600

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Manitoba

9. Callum, Carson. Relationship between RFI, fertility, and lifetime reproductive efficiency in beef heifers and cows.

Degree: Animal Science, 2016, University of Manitoba

URL: http://hdl.handle.net/1993/31893

► This study was conducted to: i) determine the effect of residual feed intake (RFI) on first parity fertility and subsequent lifetime productivity of 820 females… (more)

Subjects/Keywords: Residual Feed Intake; Fertility; Lifetime productivity; Beef heifers and cows

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APA (6^th Edition):

Callum, C. (2016). Relationship between RFI, fertility, and lifetime reproductive efficiency in beef heifers and cows. (Masters Thesis). University of Manitoba. Retrieved from http://hdl.handle.net/1993/31893

Chicago Manual of Style (16^th Edition):

Callum, Carson. “Relationship between RFI, fertility, and lifetime reproductive efficiency in beef heifers and cows.” 2016. Masters Thesis, University of Manitoba. Accessed April 12, 2021. http://hdl.handle.net/1993/31893.

MLA Handbook (7^th Edition):

Callum, Carson. “Relationship between RFI, fertility, and lifetime reproductive efficiency in beef heifers and cows.” 2016. Web. 12 Apr 2021.

Vancouver:

Callum C. Relationship between RFI, fertility, and lifetime reproductive efficiency in beef heifers and cows. [Internet] [Masters thesis]. University of Manitoba; 2016. [cited 2021 Apr 12]. Available from: http://hdl.handle.net/1993/31893.

Council of Science Editors:

Callum C. Relationship between RFI, fertility, and lifetime reproductive efficiency in beef heifers and cows. [Masters Thesis]. University of Manitoba; 2016. Available from: http://hdl.handle.net/1993/31893

University of Arkansas

10. Patterson, Jennifer Denyse. Maternal Environment and Fescue Cultivar Effects on Growth, Development, and Fertility of Beef Heifers.

Degree: PhD, 2012, University of Arkansas

URL: https://scholarworks.uark.edu/etd/470

► Eighty Brahman-influenced cows (5.6 BCS) were assigned to graze common bermudagrass (CB) or toxic tall fescue (E+) during a 60-d breeding season. Body condition… (more)

▼ Eighty Brahman-influenced cows (5.6 BCS) were assigned to graze common bermudagrass (CB) or toxic tall fescue (E+) during a 60-d breeding season. Body condition (BC) was assessed at d 0, 30, and 60 of breeding season. Cows were managed to achieve marginal (4.2 BCS) or good (6.3 BCS) BC during last trimester. Heifer birth and weaning (WW; 7 to 8 mo) weights were recorded. The Angus sired heifers were weighed and randomly assigned to E+ or non-toxic (Novel) tall fescue at 9 to 10 mo of age for 190d. Heifer weight, growth data, and antral follicle count (AFC) were collected at yearling (11 to 12 mo) and prebreeding (13 to 14 mo). Pasture was experimental unit and heifer age as covariate. Main effects were cow conception forage (ConFor), conception BC (ConBC), last trimester BC (LateBC), and heifer fescue grazed during development (Hfes). Cows grazing E+ ConFor had heifers that weighed less at birth than heifers from cows grazing CB (33.3 vs. 35.2 kg). Cow ConFor x LateBC interaction affected heifer weight and pelvic area. Heifers developed on E+ from marginal-ConBC, E+ ConFor, and marginal-LateBC cows had the lowest ADG. Novel heifer AFC from good-ConBC, CB ConFor, and marginal-LateBC cows was greater than E+ AFC from marginal-ConBC, CB ConFor, and good-LateBC cows (25.1 vs. 3.8 follicles). Cow LateBC x Hfes affected heifer pregnancy rate (90.3, 69.6, 50.0, and 43.8 percent, Novel heifers from good-LateBC cows, Novel heifers from marginal-LateBC cows, E+ heifers from good-LateBC cows, and E+ heifers from marginal-LateBC cows, respectively). Ensuring adequate conception and late-gestation BC and developing heifers on Novel fescue will increase pelvic growth, number of antral follicles, and pregnancy rates of heifer offspring. Industry applicable tools such as monitoring cow BCS, using skeletal growth indicators, and grazing Novel fescue could be beneficial in selecting replacement heifers. Advisors/Committee Members: Charles F. Rosenkrans, Jr, Michael Looper, Rick W. Rorie.

Subjects/Keywords: Biological sciences; Beef heifers; Fescue; Grazing; Animal Sciences; Animal Studies

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APA (6^th Edition):

Patterson, J. D. (2012). Maternal Environment and Fescue Cultivar Effects on Growth, Development, and Fertility of Beef Heifers. (Doctoral Dissertation). University of Arkansas. Retrieved from https://scholarworks.uark.edu/etd/470

Chicago Manual of Style (16^th Edition):

Patterson, Jennifer Denyse. “Maternal Environment and Fescue Cultivar Effects on Growth, Development, and Fertility of Beef Heifers.” 2012. Doctoral Dissertation, University of Arkansas. Accessed April 12, 2021. https://scholarworks.uark.edu/etd/470.

MLA Handbook (7^th Edition):

Patterson, Jennifer Denyse. “Maternal Environment and Fescue Cultivar Effects on Growth, Development, and Fertility of Beef Heifers.” 2012. Web. 12 Apr 2021.

Vancouver:

Patterson JD. Maternal Environment and Fescue Cultivar Effects on Growth, Development, and Fertility of Beef Heifers. [Internet] [Doctoral dissertation]. University of Arkansas; 2012. [cited 2021 Apr 12]. Available from: https://scholarworks.uark.edu/etd/470.

Council of Science Editors:

Patterson JD. Maternal Environment and Fescue Cultivar Effects on Growth, Development, and Fertility of Beef Heifers. [Doctoral Dissertation]. University of Arkansas; 2012. Available from: https://scholarworks.uark.edu/etd/470

Oklahoma State University

11. Schumacher, Stephanie Dawn. Factors Hindering the Adoption of Value-added Management and Marketing Practices and Determining Value Differences for Steers and Heifers.

Degree: Department of Agricultural Economics, 2012, Oklahoma State University

URL: http://hdl.handle.net/11244/8723

► This two-essay thesis aims to better identify non-adopting cow-calf producers in Oklahoma and to find the value of steer and heifer characteristics sold in an… (more)

Subjects/Keywords: beef producers; heifers; logit model; steers; value-added

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APA (6^th Edition):

Schumacher, S. D. (2012). Factors Hindering the Adoption of Value-added Management and Marketing Practices and Determining Value Differences for Steers and Heifers. (Thesis). Oklahoma State University. Retrieved from http://hdl.handle.net/11244/8723

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Schumacher, Stephanie Dawn. “Factors Hindering the Adoption of Value-added Management and Marketing Practices and Determining Value Differences for Steers and Heifers.” 2012. Thesis, Oklahoma State University. Accessed April 12, 2021. http://hdl.handle.net/11244/8723.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Schumacher, Stephanie Dawn. “Factors Hindering the Adoption of Value-added Management and Marketing Practices and Determining Value Differences for Steers and Heifers.” 2012. Web. 12 Apr 2021.

Vancouver:

Schumacher SD. Factors Hindering the Adoption of Value-added Management and Marketing Practices and Determining Value Differences for Steers and Heifers. [Internet] [Thesis]. Oklahoma State University; 2012. [cited 2021 Apr 12]. Available from: http://hdl.handle.net/11244/8723.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Schumacher SD. Factors Hindering the Adoption of Value-added Management and Marketing Practices and Determining Value Differences for Steers and Heifers. [Thesis]. Oklahoma State University; 2012. Available from: http://hdl.handle.net/11244/8723

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Kansas State University

12. McCabe, Esther Dorice. Beef cattle data analytics: Trends in feedlot cattle health, performance, and carcass traits, and effects of beef on dairy programs.

Degree: PhD, Department of Animal Sciences and Industry, 2021, Kansas State University

URL: http://hdl.handle.net/2097/40979

► Data science has emerged as an academic field and an important decision-making tool for the private sector. This is the result of advances in technology… (more)

▼ Data science has emerged as an academic field and an important decision-making tool for the private sector. This is the result of advances in technology that allow the collection and management of large data sets. Data analytics allows scientists to pursue questions that cannot be addressed with controlled experiments. The objective of studies within this dissertation was to use data analytics to evaluate trends in performance, health and carcass traits from feedlot cattle, and determine the effect of Holstein and beef-dairy cross breed descriptions of cattle lots on sale price. The first study utilized the Tri-County Steer Carcass Futurity Cooperative data collected from 2002 through 2018 to analyze trends across years for performance, health, and carcass traits for steers and heifers. Performance traits evaluated included arrival weight, average daily gain, feed to gain, days on feed, and harvest weight. The regression coefficients (slope) were significant (P < 0.10) for each of these traits for both steers and heifers with the exception of feed:gain (P = 0.59). The R2 for these equations was small, however, indicating that year only accounted for small amount of the variation, and that there was little change in these traits for the duration of the study. Health trends included morbidity risk, number of times treated, and mortality risk. The percentage morbidity increased (P < 0.0001) for steers and heifers. The overall mean morbidity risk for steers was 24% and 20% for heifers. The percentage of steers and heifers receiving no treatments for morbidity decreased (P < 0.0001). Concurrently, the percentage of steers and heifers treated one, two, or three or more times increased (P < 0.0001). Mortality percentage increased for steers (P < 0.0001) and heifers (P < 0.001). The overall mean mortality risk for steers was 1.8% and 1.4% for heifers. Carcass trait trends evaluated included hot carcass weight, fat thickness, ribeye area, kidney pelvic heart fat percentage, dressing percentage, marbling score, calculated yield grade, and carcass value. The regression coefficients (slope) were significant (P < 0.01) for each of these traits for both steers and heifers. With the exception of carcass value, the R2 value for these equations was small. This indicates that year only accounted for small amount of the variation, and that there was little change in these traits over the duration of the study. The second study utilized the Tri-County Steer Carcass Futurity Cooperative data to evaluate the effect of sire breed on performance, health, and carcass traits for steers and heifers. Sire breeds included in these analyses were Angus, Charolais, Hereford, Red Angus, and Simmental. Sire breed affected arrival weight, average daily gain, harvest weight, days on feed, feed to gain, feed cost, feed consumed, hot carcass weight, dressing percentage, fat thickness, ribeye area, calculated yield grade, and overall carcass value. Odds ratios were calculated for morbidity and mortality events. The sire breed of an animal was associated… Advisors/Committee Members: Karol E. FikeKenneth G. Odde.

Subjects/Keywords: Beef-dairy; Data analytics; Heifers; Holstein steers; Multiple regression; Odds ratio

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APA (6^th Edition):

McCabe, E. D. (2021). Beef cattle data analytics: Trends in feedlot cattle health, performance, and carcass traits, and effects of beef on dairy programs. (Doctoral Dissertation). Kansas State University. Retrieved from http://hdl.handle.net/2097/40979

Chicago Manual of Style (16^th Edition):

McCabe, Esther Dorice. “Beef cattle data analytics: Trends in feedlot cattle health, performance, and carcass traits, and effects of beef on dairy programs.” 2021. Doctoral Dissertation, Kansas State University. Accessed April 12, 2021. http://hdl.handle.net/2097/40979.

MLA Handbook (7^th Edition):

McCabe, Esther Dorice. “Beef cattle data analytics: Trends in feedlot cattle health, performance, and carcass traits, and effects of beef on dairy programs.” 2021. Web. 12 Apr 2021.

Vancouver:

McCabe ED. Beef cattle data analytics: Trends in feedlot cattle health, performance, and carcass traits, and effects of beef on dairy programs. [Internet] [Doctoral dissertation]. Kansas State University; 2021. [cited 2021 Apr 12]. Available from: http://hdl.handle.net/2097/40979.

Council of Science Editors:

McCabe ED. Beef cattle data analytics: Trends in feedlot cattle health, performance, and carcass traits, and effects of beef on dairy programs. [Doctoral Dissertation]. Kansas State University; 2021. Available from: http://hdl.handle.net/2097/40979

13. Boito, Bruna. Influência da gordura subcutânea de novilhos terminados em confinamento nas características de carcaça e carne.

Degree: 2014, Universidade Tecnológica Federal do Paraná; Dois Vizinhos; Programa de Pós-Graduação em Zootecnia

URL: http://repositorio.utfpr.edu.br/jspui/handle/1/1525

►

O presente estudo procurou avaliar as características de carcaça,qualidade e o perfil lipídico da carne atrelado à espessura de gordurasubcutânea das carcaças (EGS), utilizando o… (more)

▼

O presente estudo procurou avaliar as características de carcaça,qualidade e o perfil lipídico da carne atrelado à espessura de gordurasubcutânea das carcaças (EGS), utilizando o peso de abate como covariável. Os dados obtidos oram analisados por teste estatístico de analise de variância e a nível de 10% de significância, e posteriormente feita a análise de regressão para as variáveis que apresentaram diferença significativa. A qualidade da carcaça e da carne é influenciada pela espessura de gordura subcutânea interferindo no peso de carcaça quente e fria, e consequentemente nos seus rendimentos. O peso de carcaça quente (PCQ) é a principal forma de remuneração ao produtor pelos frigoríficos, aplicando-se valores de 6 mm de gordura subcutânea, em um animal com peso de abate de 450 kg na equação (PCQ=-23,77+0,60*PA+1,99*EG+0,32*EG²), encontra-se o valor de 269,69 kg de peso de carcaça quente, para peso de carcaça fria (PCF) utilizando os mesmos valores na equação (PCF=-11,86+0,56*PA+1,64*EG), o animal apresentara em média 249,98 kg de PCF. Ocorreram diferenças significativas para as porções teciduais do animal, com decréscimo da fração osso e aumento das frações músculo e gordura, conforme se aumentou a espessura de gordura subcutânea na carcaça. Para a qualidade organoléptica da carne,não ocorreram respostas significativas ao grau da espessura de gordura subcutânea. Nas análises do perfil lipídico, os ácidos graxos saturados (AGS)não sofrem alteração com o aumento da espessura de gordura na carcaça, ao contrário dos ácidos graxos insaturados (AGI), que aumentaram de forma quadrática até o ponto de 5,8 mm de espessura de gordura. Para os poliinsaturados ocorreu diferença significativa linear decrescente, para os monoinsaturados apresentaram foi encontrado efeito quadrático (AGM=14,27+0,037*PA+4,22*EG-0,31*EG²). Dentre os principais ácidos graxos encontrados na carne bovina, o C14:0 não demonstrou diferença significativa, bem como o ácido graxo C18:0. Já o C16:0 demonstrou diferença significativa (P= 0,0095) apresentando 6,6 mm EGS como ponto de máximo. O Isômero C18:1ω9c, importante precursor na síntese do CLA, obteve comportamento quadrático atingindo valor máximo de 6 mm EGS. O CLA obteve resposta quadrática, a sua concentração aumenta até 6,9 mm de espessura de gordura, após essa espessura de gordura seus valores começam a decair. A relação entre os ácidos graxos ω6:ω3 não apresentam diferença significativa. O ω3 obteve resposta quadrática, aumentando sua deposição até 6,3 mm de espessura de gordura, após esse valor começa decair interferindo na boa relação entre ω6:ω3. A espessura de gordura subcutânea de 6,0 mm influência positivamente o peso e rendimento de caraça quente e fria, na quantidade de osso, músculo e gordura presentes na carcaça e nos ácidos graxos benéficos a saúde humana.

This study was develop to evaluate the carcass characteristics,quality and lipid profile linked to subcutaneous fat thickness (SFT) using the slaughter weight as a co-variable. The data were analyzed by statistical test for…

Advisors/Committee Members: Kuss, Fernando, Menezes, Luis Fernando Glasenapp de.

Subjects/Keywords: Bovinos de corte; Novilhos; Nutrição animal; Beef cattle; Heifers; Animal nutrition

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APA (6^th Edition):

Boito, B. (2014). Influência da gordura subcutânea de novilhos terminados em confinamento nas características de carcaça e carne. (Masters Thesis). Universidade Tecnológica Federal do Paraná; Dois Vizinhos; Programa de Pós-Graduação em Zootecnia. Retrieved from http://repositorio.utfpr.edu.br/jspui/handle/1/1525

Chicago Manual of Style (16^th Edition):

Boito, Bruna. “Influência da gordura subcutânea de novilhos terminados em confinamento nas características de carcaça e carne.” 2014. Masters Thesis, Universidade Tecnológica Federal do Paraná; Dois Vizinhos; Programa de Pós-Graduação em Zootecnia. Accessed April 12, 2021. http://repositorio.utfpr.edu.br/jspui/handle/1/1525.

MLA Handbook (7^th Edition):

Boito, Bruna. “Influência da gordura subcutânea de novilhos terminados em confinamento nas características de carcaça e carne.” 2014. Web. 12 Apr 2021.

Vancouver:

Boito B. Influência da gordura subcutânea de novilhos terminados em confinamento nas características de carcaça e carne. [Internet] [Masters thesis]. Universidade Tecnológica Federal do Paraná; Dois Vizinhos; Programa de Pós-Graduação em Zootecnia; 2014. [cited 2021 Apr 12]. Available from: http://repositorio.utfpr.edu.br/jspui/handle/1/1525.

Council of Science Editors:

Boito B. Influência da gordura subcutânea de novilhos terminados em confinamento nas características de carcaça e carne. [Masters Thesis]. Universidade Tecnológica Federal do Paraná; Dois Vizinhos; Programa de Pós-Graduação em Zootecnia; 2014. Available from: http://repositorio.utfpr.edu.br/jspui/handle/1/1525

Montana State University

14. Anderson, Leif Paul. The effects of degradable and metabolizable protein supply on the performance of first-calf heifers.

Degree: MS, College of Agriculture, 1998, Montana State University

URL: https://scholarworks.montana.edu/xmlui/handle/1/8495

Subjects/Keywords: Beef cattle; Heifers; Feeds

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APA (6^th Edition):

Anderson, L. P. (1998). The effects of degradable and metabolizable protein supply on the performance of first-calf heifers. (Masters Thesis). Montana State University. Retrieved from https://scholarworks.montana.edu/xmlui/handle/1/8495

Chicago Manual of Style (16^th Edition):

Anderson, Leif Paul. “The effects of degradable and metabolizable protein supply on the performance of first-calf heifers.” 1998. Masters Thesis, Montana State University. Accessed April 12, 2021. https://scholarworks.montana.edu/xmlui/handle/1/8495.

MLA Handbook (7^th Edition):

Anderson, Leif Paul. “The effects of degradable and metabolizable protein supply on the performance of first-calf heifers.” 1998. Web. 12 Apr 2021.

Vancouver:

Anderson LP. The effects of degradable and metabolizable protein supply on the performance of first-calf heifers. [Internet] [Masters thesis]. Montana State University; 1998. [cited 2021 Apr 12]. Available from: https://scholarworks.montana.edu/xmlui/handle/1/8495.

Council of Science Editors:

Anderson LP. The effects of degradable and metabolizable protein supply on the performance of first-calf heifers. [Masters Thesis]. Montana State University; 1998. Available from: https://scholarworks.montana.edu/xmlui/handle/1/8495

Montana State University

15. Skarland, Andrew Selmer. Effects of crude ergot upon feedlot performance and upon certain blood components of beef heifers.

Degree: MS, College of Agriculture, 1972, Montana State University

URL: https://scholarworks.montana.edu/xmlui/handle/1/6104

Subjects/Keywords: Ergot; Beef cattle; Heifers; Feeds

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APA (6^th Edition):

Skarland, A. S. (1972). Effects of crude ergot upon feedlot performance and upon certain blood components of beef heifers. (Masters Thesis). Montana State University. Retrieved from https://scholarworks.montana.edu/xmlui/handle/1/6104

Chicago Manual of Style (16^th Edition):

Skarland, Andrew Selmer. “Effects of crude ergot upon feedlot performance and upon certain blood components of beef heifers.” 1972. Masters Thesis, Montana State University. Accessed April 12, 2021. https://scholarworks.montana.edu/xmlui/handle/1/6104.

MLA Handbook (7^th Edition):

Skarland, Andrew Selmer. “Effects of crude ergot upon feedlot performance and upon certain blood components of beef heifers.” 1972. Web. 12 Apr 2021.

Vancouver:

Skarland AS. Effects of crude ergot upon feedlot performance and upon certain blood components of beef heifers. [Internet] [Masters thesis]. Montana State University; 1972. [cited 2021 Apr 12]. Available from: https://scholarworks.montana.edu/xmlui/handle/1/6104.

Council of Science Editors:

Skarland AS. Effects of crude ergot upon feedlot performance and upon certain blood components of beef heifers. [Masters Thesis]. Montana State University; 1972. Available from: https://scholarworks.montana.edu/xmlui/handle/1/6104

Montana State University

16. Marchello, John A. Heritability of 18 month weight of heifers and the relationship of this weight to the birth and weaning weight of the heifer's first calf.

Degree: MS, College of Agriculture, 1960, Montana State University

URL: https://scholarworks.montana.edu/xmlui/handle/1/5695

Subjects/Keywords: Beef cattle; Heifers; Reproduction

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APA (6^th Edition):

Marchello, J. A. (1960). Heritability of 18 month weight of heifers and the relationship of this weight to the birth and weaning weight of the heifer's first calf. (Masters Thesis). Montana State University. Retrieved from https://scholarworks.montana.edu/xmlui/handle/1/5695

Chicago Manual of Style (16^th Edition):

Marchello, John A. “Heritability of 18 month weight of heifers and the relationship of this weight to the birth and weaning weight of the heifer's first calf.” 1960. Masters Thesis, Montana State University. Accessed April 12, 2021. https://scholarworks.montana.edu/xmlui/handle/1/5695.

MLA Handbook (7^th Edition):

Marchello, John A. “Heritability of 18 month weight of heifers and the relationship of this weight to the birth and weaning weight of the heifer's first calf.” 1960. Web. 12 Apr 2021.

Vancouver:

Marchello JA. Heritability of 18 month weight of heifers and the relationship of this weight to the birth and weaning weight of the heifer's first calf. [Internet] [Masters thesis]. Montana State University; 1960. [cited 2021 Apr 12]. Available from: https://scholarworks.montana.edu/xmlui/handle/1/5695.

Council of Science Editors:

Marchello JA. Heritability of 18 month weight of heifers and the relationship of this weight to the birth and weaning weight of the heifer's first calf. [Masters Thesis]. Montana State University; 1960. Available from: https://scholarworks.montana.edu/xmlui/handle/1/5695

University of Florida

17. Rodrigues Gomes Mercadante, Vitor. Strategies to Improve Reproductive Efficiency in Beef Females and Enhance Offspring Postnatal Performance.

Degree: PhD, Animal Sciences, 2015, University of Florida

URL: https://ufdc.ufl.edu/UFE0049554

► To evaluate the effects of reducing concentrations of progesterone (P4) during an ovulation synchronization protocol on pregnancy rates to fixed-timed artificial insemination (TAI), beef cows… (more)

▼ To evaluate the effects of reducing concentrations of progesterone (P4) during an ovulation synchronization protocol on pregnancy rates to fixed-timed artificial insemination (TAI), beef cows and heifers were assigned to receive treatments: 7-d CO-Synch+CIDR (CO-Synch+CIDR); or 7-d CO-Synch+CIDR with an additional injection of prostaglandin F2alpha (PGF) at the initiation of the protocol (PG-CO-Synch+CIDR). Concentrations of P4 were greater at CIDR removal for CO-Synch+CIDR than for PG-CO-Synch+CIDR for cows and heifers. Follicle diameter at CIDR removal was greater for PG-CO-Synch+CIDR compared to CO-Synch+CIDR for cows, but not heifers, and pregnancy rates to TAI were similar between treatments. To determine the effects of administration of bovine somatotropin (bST; 325 mg) on hormone concentration, conceptus development and postnatal offspring performance, suckled beef cows were exposed to a TAI protocol, and randomly assigned to receive treatments: CTRL, no bST; TAIbST, bST on d 0 (TAI); d14bST, bST on d 14; 2bST, bST on d 0 and 14. Administration of bST at TAI increased plasma concentration of insulin-like growth factor 1 (IGF-1). The TAIbST treatment had increased mRNA expression of myxovirus 2 on d 21 compared to 2bST. However, fetal size, birth weight and postnatal performance did not differ among treatments. In another experiment, Year 1, heifers were enrolled in a TAI protocol and assigned to receive either no bST (CTRL), 325 mg at TAI (S-bST) or 14 d later (d14bST), or 650 mg at TAI (D-bST). Injection of bST increased concentrations of IGF-1, however, did not altered fetal size. Heifers in D-bST had greater pregnancy rate to TAI compared to d14bST and CTRL. Year 2, heifers were assigned to D-bST or CTRL treatments, and data from both years were combined. Injection of bST increased concentration of IGF-1, but failed to increase fetal size, and a treatment by year interaction was detected for pregnancy rate to TAI. In conclusion, addition of PGF to the 7-d CO-Synch+CIDR decreased concentrations of P4, but failed to increase TAI pregnancy rates. Administration of bST enhanced concentrations of IGF-1, but failed to improve TAI pregnancy rates, fetal size, had no effect on calf birth weight and postnatal performance. ( en ) Advisors/Committee Members: LAMB,GRAHAM CLIFF (committee chair), DAHL,GEOFFREY E (committee member), RAE,D O (committee member).

Subjects/Keywords: Beef; Beef cattle; Cattle; Conceptus; Dairy cattle; Heifers; Ovulation; Placebos; Pregnancy; Pregnancy rate; beef-cattle – bst – fetal-programming – progesterone – prostaglandin – reproduction

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Rodrigues Gomes Mercadante, V. (2015). Strategies to Improve Reproductive Efficiency in Beef Females and Enhance Offspring Postnatal Performance. (Doctoral Dissertation). University of Florida. Retrieved from https://ufdc.ufl.edu/UFE0049554

Chicago Manual of Style (16^th Edition):

Rodrigues Gomes Mercadante, Vitor. “Strategies to Improve Reproductive Efficiency in Beef Females and Enhance Offspring Postnatal Performance.” 2015. Doctoral Dissertation, University of Florida. Accessed April 12, 2021. https://ufdc.ufl.edu/UFE0049554.

MLA Handbook (7^th Edition):

Rodrigues Gomes Mercadante, Vitor. “Strategies to Improve Reproductive Efficiency in Beef Females and Enhance Offspring Postnatal Performance.” 2015. Web. 12 Apr 2021.

Vancouver:

Rodrigues Gomes Mercadante V. Strategies to Improve Reproductive Efficiency in Beef Females and Enhance Offspring Postnatal Performance. [Internet] [Doctoral dissertation]. University of Florida; 2015. [cited 2021 Apr 12]. Available from: https://ufdc.ufl.edu/UFE0049554.

Council of Science Editors:

Rodrigues Gomes Mercadante V. Strategies to Improve Reproductive Efficiency in Beef Females and Enhance Offspring Postnatal Performance. [Doctoral Dissertation]. University of Florida; 2015. Available from: https://ufdc.ufl.edu/UFE0049554

University of Florida

18. Moriel, Philipe. Long-Term Effects of Metabolic Imprinting and Calf Management Systems following Early-Weaning on Growth and Reproductive Performance of Beef Calves.

Degree: PhD, Animal Sciences, 2013, University of Florida

URL: https://ufdc.ufl.edu/UFE0045739

► Two 2-yr experiments evaluated the long-term effects of metabolic imprinting and different nutritional management systems for EW beef calves (Bos spp.). Experiment 1 evaluated the… (more)

▼ Two 2-yr experiments evaluated the long-term effects of metabolic imprinting and different nutritional management systems for EW beef calves (Bos spp.). Experiment 1 evaluated the growth performance, carcass characteristics and muscle gene expression of beef steers, while experiment 2 evaluated the liver gene expression, growth and reproductive performance of beef heifers. In both experiments, calves were normally weaned (NW) at 250 d of age (d 180), or early-weaned (EW) at 70 d of age (d 0) and randomly assigned to 1 of 3 EW calf management systems: 1) EW and limit-fed a high-concentrate diet in drylot for at least 180 d; 2) EW and limit-fed a high-concentrate diet in drylot for 90 d, then bahiagrass grazing until the time of NW (d 180); and 3) EW and ryegrass grazing for 60 to 90 d, then bahiagrass grazing until the time of NW. Experiment 1 demonstrated that overall growth performance of EW steers was similar or greater than NW steers. Early-weaned calves provided a high-concentrate diet in drylot for at least 90 d had greater body weight at the time of NW, and enhanced growth performance during the first 28 d of the finishing phase, when compared to NW and EW steers grazing annual ryegrass pastures. Also, feeding a high-concentrate diet to EW steers for at least 90 d enhanced plasma concentrations of IGF-1, and the expression of genes associated with growth (muscle IGF-1 receptor and paired box gene 7) and adipose tissue formation (peroxisome proliferator-activated receptor ?). However, early-exposure to high-concentrate diets did not affect the overall carcass characteristics and marbling scores of steers slaughtered at a common backfat thickness. Experiment 2 demonstrated that EW heifers provided a high-concentrate diet for at least 90 d in drylot and EW heifers grazed on ryegrass pastures, had similar or greater growth performance than NW heifers. Furthermore, it provided evidence that early-exposure to a high-concentrate diet lead to metabolic imprinting effects, such as altered liver IGF-1 expression (during periods of similar nutritional management) and early puberty achievement of Bos indicus-influenced beef heifers. Calf weaning at the onset of the breeding season enhanced cow growth performance, and tended to enhance reproductive performance of multiparous cows. ( en ) Advisors/Committee Members: Arthington, John David (committee chair), Hersom, Matthew J (committee member), Johnson, Sally E (committee member), Vendramini, Joao Mauricio Bueno (committee member), Gerrard, David E (committee member), Mccann, Mark (committee member).

Subjects/Keywords: Beef; Calves; Cattle; Early weaning; Heifers; Messenger RNA; Pastures; Plasmas; Puberty; Weaning; early-weaning – heifers – imprinting – metabolic – steers

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Moriel, P. (2013). Long-Term Effects of Metabolic Imprinting and Calf Management Systems following Early-Weaning on Growth and Reproductive Performance of Beef Calves. (Doctoral Dissertation). University of Florida. Retrieved from https://ufdc.ufl.edu/UFE0045739

Chicago Manual of Style (16^th Edition):

Moriel, Philipe. “Long-Term Effects of Metabolic Imprinting and Calf Management Systems following Early-Weaning on Growth and Reproductive Performance of Beef Calves.” 2013. Doctoral Dissertation, University of Florida. Accessed April 12, 2021. https://ufdc.ufl.edu/UFE0045739.

MLA Handbook (7^th Edition):

Moriel, Philipe. “Long-Term Effects of Metabolic Imprinting and Calf Management Systems following Early-Weaning on Growth and Reproductive Performance of Beef Calves.” 2013. Web. 12 Apr 2021.

Vancouver:

Moriel P. Long-Term Effects of Metabolic Imprinting and Calf Management Systems following Early-Weaning on Growth and Reproductive Performance of Beef Calves. [Internet] [Doctoral dissertation]. University of Florida; 2013. [cited 2021 Apr 12]. Available from: https://ufdc.ufl.edu/UFE0045739.

Council of Science Editors:

Moriel P. Long-Term Effects of Metabolic Imprinting and Calf Management Systems following Early-Weaning on Growth and Reproductive Performance of Beef Calves. [Doctoral Dissertation]. University of Florida; 2013. Available from: https://ufdc.ufl.edu/UFE0045739

Universidade Federal de Viçosa

19. Victor Rezende Moreira Couto. Performance and nutritional characteristics of beef heifers in growing submitted different strategies of supplementation in grazing.

Degree: 2008, Universidade Federal de Viçosa

URL: http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=2019

► Com o objetivo de avaliar o desempenho e as características nutricionais de fêmeas de corte em cria e recria, submetidas a diferentes estratégias de suplementação… (more)

▼ Com o objetivo de avaliar o desempenho e as características nutricionais de fêmeas de corte em cria e recria, submetidas a diferentes estratégias de suplementação sob pastejo, foram realizados quatro experimentos contemplando os períodos de transição águas-seca, seca, transição secaáguas e águas. No primeiro experimento, objetivou-se avaliar o desempenho produtivo, consumo de pasto e de leite e a digestibilidade dos nutrientes ingeridos por bezerras Nelore ou mestiças, com predominância de sangue zebu, suplementadas com diferentes quantidades de energia, em regime de creep-feeding em pastagens de Brachiaria decumbens Stapf, durante o período de transição águas-seca. Foram utilizadas 51 bezerras com predominância de sangue Nelore e suas respectivas mães, com idades e pesos médios iniciais das bezerras de 120 dias e 133,4 3,12 kg, respectivamente, para a avaliação do desempenho produtivo, consumo e digestibilidade da dieta. Foram avaliados quatro tratamentos: mistura mineral MM; 0,250 kg de suplemento/cab/dia T250; 0,500 kg de suplemento/cab/dia T500; 0,750 kg de suplemento/cab/dia T750; totalizando três grupos com treze animais cada e um grupo com 12 animais. Todos os suplementos foram balanceados para fornecerem 100g de proteína bruta/animal/dia. Foram utilizados LIPE e óxido crômico como indicadores externos para estimativa da excreção fecal e consumo de MS individual de suplemento, respectivamente e a FDN indigestível como indicador interno para o consumo de pasto. O desempenho dos animais não foi diferente para animais suplementados ou não- suplementados. O consumo de MS total de MS de pasto foi maior para os animais suplementados, bem como a digestibilidade da MS e da FDNcp ingerida pelos animais. A produção média de leite das vacas foi de 5,33 kg por dia, com média 3,51% de proteína e 4,85% de gordura. Com isso conclui-se que o uso da suplementação múltipla em diferentes níveis, contendo 100g de PB, comparado a animais recebendo apenas mistura mineral, não promove melhorias significativas no desempenho de bezerras de corte lactentes sob pastejo em Brachiaria decumbens, Stapf suplementadas no período de transição águas/seca. No segundo experimento objetivou-se avaliar o desempenho produtivo, consumo e digestibilidade dos nutrientes ingeridos por novilhas Nelore ou mestiças, com predominância de sangue zebu, em recria, suplementadas em dois níveis, com fontes de energia amilácea ou fibrosa, em pastagens de Brachiaria decumbens Stapf, durante o período da seca. Foram utilizadas 40 novilhas sendo 20 da raça Nelore e 20 mestiças, com predominância de sangue zebu, recém- desmamadas, com idade e pesos médios iniciais, respectivamente, de 8,5 meses e 197,9 3,74 kg. Foram formulados dois suplementos, sendo o primeiro a base de fubá de milho e farelo de soja - rico em amido e o segundo a base de farelo de trigo - rico em fibra. Os tratamentos foram: suplemento a base de milho ou trigo na quantidade de 0,5 ou 1,0 kg/animal/dia, mais um tratamento controle suplementado apenas com mistura mineral. O ganho médio diário de… Advisors/Committee Members: Sebastião de Campos Valadares Filho, Edenio Detmann, Pedro Veiga Rodrigues Paulino, Lara Toledo Henriques, Mário Fonseca Paulino.

Subjects/Keywords: NUTRICAO E ALIMENTACAO ANIMAL; Suplementação; Bovino de corte; Novilhas; Heifers; Beef cattle; Supplementation

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Couto, V. R. M. (2008). Performance and nutritional characteristics of beef heifers in growing submitted different strategies of supplementation in grazing. (Thesis). Universidade Federal de Viçosa. Retrieved from http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=2019

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Couto, Victor Rezende Moreira. “Performance and nutritional characteristics of beef heifers in growing submitted different strategies of supplementation in grazing.” 2008. Thesis, Universidade Federal de Viçosa. Accessed April 12, 2021. http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=2019.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Couto, Victor Rezende Moreira. “Performance and nutritional characteristics of beef heifers in growing submitted different strategies of supplementation in grazing.” 2008. Web. 12 Apr 2021.

Vancouver:

Couto VRM. Performance and nutritional characteristics of beef heifers in growing submitted different strategies of supplementation in grazing. [Internet] [Thesis]. Universidade Federal de Viçosa; 2008. [cited 2021 Apr 12]. Available from: http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=2019.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Couto VRM. Performance and nutritional characteristics of beef heifers in growing submitted different strategies of supplementation in grazing. [Thesis]. Universidade Federal de Viçosa; 2008. Available from: http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=2019

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Universidade Federal de Viçosa

20. Javier Enrique Garcés Cardenas. Suplementação de bezerras de corte lactentes com diferentes níveis de proteína bruta e características nutricionais e produtivas de vacas de corte.

Degree: 2012, Universidade Federal de Viçosa

URL: http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=5184

►

A presente investigação foi elaborada com base em um experimento relacionado às avaliações produtivas e nutricionais de bezerras lactentes, suplementadas com a técnica de creep-feeding,… (more)

▼

A presente investigação foi elaborada com base em um experimento relacionado às avaliações produtivas e nutricionais de bezerras lactentes, suplementadas com a técnica de creep-feeding, e suas respectivas mães, mantidas a pasto. Objetivou-se avaliar a eficiência da suplementação de bezerras de corte lactentes com diferentes níveis de proteína bruta e as características nutricionais e produtivas de vacas de corte. Utilizaram-se 60 bezerras de corte com predominância de sangue Nelore, lactentes, com idade média de 126 3,08 dias e peso médio inicial de 123 3,09 kg, e suas respectivas mães, vacas de corte com predominância de sangue Nelore, com peso inicial e escore de condição corporal inicial médio de 450 6,97 kg e 3,7 0,07, respectivamente. O delineamento experimental foi inteiramente casualizado com seis tratamentos e dez repetições. Os tratamentos destinados às bezerras foram constituídos pelos níveis de proteína bruta nos suplementos de 7,3; 16,7; 25,6; 34,6 e 43,2% com base na matéria seca, e um tratamento controle recebendo apenas mistura mineral ad libitum. Os suplementos foram fornecidos diariamente, na quantidade de 0,5 quilograma por bezerra. As vacas receberam apenas mistura mineral ad libitum. As bezerras suplementadas apresentaram ganho médio diário superior as do grupo controle (P<0,10) e não houve diferença entre os grupos para os distintos níveis de proteína bruta. Não houve diferenças (P>0,10) no consumo de matéria seca total, matéria seca de leite. Os animais do grupo controle tiveram maior consumo de matéria seca de pasto (P<0,10). A digestibilidade aparente total da matéria seca, extrato etéreo, carboidratos não fibrosos, fibra insolúvel em detergente neutro corrigida para cinzas e proteína e nutrientes digestíveis totais não diferiu entre os tratamentos (P>0,10). Não houve efeito (P>0,10) dos níveis de suplementação sobre o fluxo de compostos nitrogenados microbianos em g/dia. Não houve efeito (P>0,10) na eficiência de síntese microbiana expressa como g proteína bruta microbiana/kg de nutrientes digestíveis totais consumidos, e o fluxo de compostos nitrogenados microbianos em relação ao nitrogênio ingerido (g/g) apresentou perfil linear negativo. Os tratamentos não influenciaram a produção microbiana diária (P>0,10). A concentração de nitrogênio uréico sérico foi maior nos animais que receberam algum tipo de suplemento em relação aos não suplementados (P<0,10); tal fato pode ser atribuído ao maior consumo de proteína bruta. Não houve diferenças significativas (P>0,10) entre o peso final, ganho médio diário, escore de condição corporal e produção de leite das vacas quanto aos tratamentos das suas crias. Conclui-se que a suplementação múltipla incrementa o ganho médio diário de bezerras lactentes, não sendo detectado efeito da composição do suplemento, em termos de concentração de proteína, quando suplementadas com 0,5 kg/dia e que a estratégia de suplementação múltipla de bezerras de corte lactentes não influencia o ganho de peso, o escore de condição corporal e a produção de leite das vacas.

The…

Advisors/Committee Members: Mário Fonseca Paulino, Marcos Inácio Marcondes, Mario Luiz Chizzotti, Luciana Navajas Rennó.

Subjects/Keywords: Forragem; Bezerras de corte; Suplementação; NUTRICAO E ALIMENTACAO ANIMAL; Beef heifers; Forage; Supplementation

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Cardenas, J. E. G. (2012). Suplementação de bezerras de corte lactentes com diferentes níveis de proteína bruta e características nutricionais e produtivas de vacas de corte. (Thesis). Universidade Federal de Viçosa. Retrieved from http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=5184

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Cardenas, Javier Enrique Garcés. “Suplementação de bezerras de corte lactentes com diferentes níveis de proteína bruta e características nutricionais e produtivas de vacas de corte.” 2012. Thesis, Universidade Federal de Viçosa. Accessed April 12, 2021. http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=5184.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Cardenas, Javier Enrique Garcés. “Suplementação de bezerras de corte lactentes com diferentes níveis de proteína bruta e características nutricionais e produtivas de vacas de corte.” 2012. Web. 12 Apr 2021.

Vancouver:

Cardenas JEG. Suplementação de bezerras de corte lactentes com diferentes níveis de proteína bruta e características nutricionais e produtivas de vacas de corte. [Internet] [Thesis]. Universidade Federal de Viçosa; 2012. [cited 2021 Apr 12]. Available from: http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=5184.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Cardenas JEG. Suplementação de bezerras de corte lactentes com diferentes níveis de proteína bruta e características nutricionais e produtivas de vacas de corte. [Thesis]. Universidade Federal de Viçosa; 2012. Available from: http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=5184

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Michigan State University

21. Main, David Glenn. The effects of ovariectomy, growth promotants and pubertal status on performance of growing and finishing beef heifers.

Degree: MS, Department of Animal Science, 1990, Michigan State University

URL: http://etd.lib.msu.edu/islandora/object/etd:23469

Subjects/Keywords: Ovariectomy; Beef cattle – Growth; Heifers – Growth

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Main, D. G. (1990). The effects of ovariectomy, growth promotants and pubertal status on performance of growing and finishing beef heifers. (Masters Thesis). Michigan State University. Retrieved from http://etd.lib.msu.edu/islandora/object/etd:23469

Chicago Manual of Style (16^th Edition):

Main, David Glenn. “The effects of ovariectomy, growth promotants and pubertal status on performance of growing and finishing beef heifers.” 1990. Masters Thesis, Michigan State University. Accessed April 12, 2021. http://etd.lib.msu.edu/islandora/object/etd:23469.

MLA Handbook (7^th Edition):

Main, David Glenn. “The effects of ovariectomy, growth promotants and pubertal status on performance of growing and finishing beef heifers.” 1990. Web. 12 Apr 2021.

Vancouver:

Main DG. The effects of ovariectomy, growth promotants and pubertal status on performance of growing and finishing beef heifers. [Internet] [Masters thesis]. Michigan State University; 1990. [cited 2021 Apr 12]. Available from: http://etd.lib.msu.edu/islandora/object/etd:23469.

Council of Science Editors:

Main DG. The effects of ovariectomy, growth promotants and pubertal status on performance of growing and finishing beef heifers. [Masters Thesis]. Michigan State University; 1990. Available from: http://etd.lib.msu.edu/islandora/object/etd:23469

22. Kleber Menegon Lemes. Comparação da eficiência de diferentes formulações à base de progesterona para indução da puberdade e desempenho reprodutivo em novilhas da raça Nelore.

Degree: 2018, University of São Paulo

URL: http://www.teses.usp.br/teses/disponiveis/10/10131/tde-15062018-163055/

► Foram avaliadas diferentes formulações à base de progesterona (P4) para indução da puberdade e desempenho reprodutivo em novilhas da raça Nelore. Ao início do protocolo… (more)

▼ Foram avaliadas diferentes formulações à base de progesterona (P4) para indução da puberdade e desempenho reprodutivo em novilhas da raça Nelore. Ao início do protocolo (D0), os animais (n=400; 13,5 ± 0,05 meses e 241,49 ± 1,50kg) foram distribuídos entre os grupos CT (Controle; sem tratamento; n=122), DI (Dispositivo Intravaginal; n=117) e IN (150 mg P4 injetável de longa ação; n=118). Dez dias (D10) após, os grupos tratados receberam 1 mg de benzoato de estradiol (BE) e 150 µg de PGF2α. Após doze dias (D22), todos os animais foram submetidos a protocolos de IATF e avaliados quanto à presença de CL (taxa de ovulação ao protocolo de indução da puberdade). Neste momento, todos os animais receberam um DI de P4 (1 g) e 2 mg de BE. Oito dias e meio após, os DI foram removidos e administrados 1 mg de BE, 150 µg de PGF2α e 300 UI de eCG. A IATF foi realizada no D10. Foram avaliadas características de desenvolvimento ovariano e uterino, assim como o desempenho reprodutivo após dois protocolos de IATF consecutivos. Houve aumento (P < 0,05) do FD nos animais do grupo IN no D10, assim como maior (P < 0,05) diâmetro ovariano nos grupos DI e IN no D22. O tônus e diâmetro uterino foram superiores (P < 0,05) no D10 nos grupos tratados e permaneceram superiores até o início do protocolo de IATF (D22). Adicionalmente, o tônus e diâmetro uterino no grupo IN foram superiores (P < 0,05) ao grupo DI no mesmo período. Houve aumento (P < 0,05) na taxa de indução da puberdade nos animais tratados (DI = 63,25a% e IN = 68,64a%) quando comparados ao grupo CT (4,92b%). Foram observados maior diâmetro (P < 0,05) do FD no D8,5 nos grupos tratados (DI e IN) e tendência (P < 0,10) de aumento no FD no momento da IATF no grupo IN quando comparado ao grupo CT. Houve aumento (P < 0,05) na taxa de concepção à 1ª IATF no grupo IN (42,74%) quando comparado aos grupos CT (24,59%) e DI (26,49%). No entanto, não houve diferença (P > 0,05) na taxa de concepção à 2ª IATF, taxa de concepção acumulada, taxa de prenhez final, perda gestacional entre o DG30 e DG60 ou após o DG60. Desta forma, a utilização de P4 para indução da puberdade em novilhas Nelore é um tratamento eficaz, assim como aumenta o desenvolvimento do aparelho reprodutivo nos animais tratados. A utilização de P4 injetável de longa ação é uma alternativa aos tratamentos utilizados rotineiramente (dispositivos intravaginais) para indução da puberdade em novilhas, além de ser uma ferramenta de menor custo e maior praticidade de manejo, contribuindo também com a questão sanitária do rebanho. O tratamento com P4 para indução da puberdade aumenta a taxa de ciclicidade ao início do protocolo de IATF, porém, não aumenta a taxa de concepção acumulada, taxa de prenhez final e taxa de perda gestacional após a IATF. No entanto, houve aumento na taxa de concepção à 1ª IATF em animais tratados com P4 injetável de longa ação, antecipando o momento da concepção durante a EM. Desta forma, é possível reduzir a idade ao primeiro parto para os 2 anos em… Advisors/Committee Members: Ed Hoffmann Madureira, Rubens Paes de Arruda, Milton Maturana Filho, Guilherme Pugliesi, Luciano Andrade Silva.

Subjects/Keywords: Ciclicidade; Novilhas de corte; Pré-púbere; Precocidade; Prenhez; Beef Heifers; Cyclicity; Precocity; Pregnancy; Prepubertal

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Lemes, K. M. (2018). Comparação da eficiência de diferentes formulações à base de progesterona para indução da puberdade e desempenho reprodutivo em novilhas da raça Nelore. (Doctoral Dissertation). University of São Paulo. Retrieved from http://www.teses.usp.br/teses/disponiveis/10/10131/tde-15062018-163055/

Chicago Manual of Style (16^th Edition):

Lemes, Kleber Menegon. “Comparação da eficiência de diferentes formulações à base de progesterona para indução da puberdade e desempenho reprodutivo em novilhas da raça Nelore.” 2018. Doctoral Dissertation, University of São Paulo. Accessed April 12, 2021. http://www.teses.usp.br/teses/disponiveis/10/10131/tde-15062018-163055/.

MLA Handbook (7^th Edition):

Lemes, Kleber Menegon. “Comparação da eficiência de diferentes formulações à base de progesterona para indução da puberdade e desempenho reprodutivo em novilhas da raça Nelore.” 2018. Web. 12 Apr 2021.

Vancouver:

Lemes KM. Comparação da eficiência de diferentes formulações à base de progesterona para indução da puberdade e desempenho reprodutivo em novilhas da raça Nelore. [Internet] [Doctoral dissertation]. University of São Paulo; 2018. [cited 2021 Apr 12]. Available from: http://www.teses.usp.br/teses/disponiveis/10/10131/tde-15062018-163055/.

Council of Science Editors:

Lemes KM. Comparação da eficiência de diferentes formulações à base de progesterona para indução da puberdade e desempenho reprodutivo em novilhas da raça Nelore. [Doctoral Dissertation]. University of São Paulo; 2018. Available from: http://www.teses.usp.br/teses/disponiveis/10/10131/tde-15062018-163055/

23. Barros, Lívia Vieira de. Estratégias de suplementação para fêmeas bovinas de corte em diferentes fases do ciclo produtivo.

Degree: 2012, Federal University of Viçosa

URL: http://locus.ufv.br/handle/123456789/1818

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Conselho Nacional de… (more)

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Conselho Nacional de Desenvolvimento Científico e Tecnológico

This thesis was drawn from three experiments with beef heifers under different supplementation strategies at pasture. The first work aimed to evaluate productive and nutritional performance of female calves fed mineral mixture or multiple supplements and milk production, pasture intake and digestibility of beef cows, in Uruchloa decumbens pastures. It was used 48 female calves with average age of 5 months and initial average weight of 125.4±1.34 kg and their respective dams with initial average weight of 435.2 ± 10.3. The experimental design was the complete random design. Supplements contained approximately 25% of crude protein (CP) and progressive replacement of soybean meal (SB) by cotton seed meal 38% (CS) at the levels of 0; 33; 67 and 100% for treatments CS0, CS33, CS67 and CS100, respectively. Animals in the control treatment (CT) were fed only mineral mixture ad libitum; supplements were offered at the amount of 0.5 kg/animal/day in the other treatments. Daily gain (g) was 687.8; 733.2; 820.0; 760.6, respectively for treatments CT, CS0, CS33, CS67 and CS100. Supplemented female calves presented greater weight gain. It was not found effects of the levels of CS (P>0.10) on daily average gain. Intakes in kg/day of dry matter (DM), organic matter (OM), crude protein (CD), non fibrous carbohydrates (NFC), digested dry matter and total digestible nutrients were greater (P<0.10) for supplemented animals than for non supplemented animals. It was found a linear decreasing effect among levels of replacing SM by CS with the increasing level of CS on intake of digested dry matter and digested neutral detergent fiber. Coefficients of total apparent digestibility of DM, OM, CP and NFC were the highest (P<0.10) for supplemented animals. A decreasing linear effect on digestibility of neutral detergent fiber was found among replacing levels of SM by CS. Supplementation of female calves did not influence the performance of the cows, the milk production and dietary components by the cows (P>0.10). It is concluded that supplementation in the pre-weaning period provides a greater weight of female calves. The second work aimed to evaluate the effect of supplementation with multiple supplement or mineral mixture in the dry season (phase 1) and/or dry-rainy transition season (phase 2) on the nutritional variables and productive performance of beef cattle in Uruchloa decumbens pasture. It was used 40 40 x heifers at initial age and average weight of 8 months and 200 ± 3.74 kg, respectively in a complete random design with four treatments and 10 replicates. In the phase 1, two groups of animals were fed multiple supplement and the other two groups were fed only mineral mixture ad libitum. In the second phase of the experiment, the two groups that received multiple supplements,…

Advisors/Committee Members: Rennó, Luciana Navajas, Valadares Filho, Sebastião de Campos, Paulino, Mário Fonseca, Chizzotti, Mario Luiz, Moraes, Eduardo Henrique Bevitori Kling de.

Subjects/Keywords: Fêmeas; Bovinos; Suplementação; Beef; Heifers; Supplementation; CNPQ::CIENCIAS AGRARIAS::ZOOTECNIA::NUTRICAO E ALIMENTACAO ANIMAL

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APA (6^th Edition):

Barros, L. V. d. (2012). Estratégias de suplementação para fêmeas bovinas de corte em diferentes fases do ciclo produtivo. (Doctoral Dissertation). Federal University of Viçosa. Retrieved from http://locus.ufv.br/handle/123456789/1818

Chicago Manual of Style (16^th Edition):

Barros, Lívia Vieira de. “Estratégias de suplementação para fêmeas bovinas de corte em diferentes fases do ciclo produtivo.” 2012. Doctoral Dissertation, Federal University of Viçosa. Accessed April 12, 2021. http://locus.ufv.br/handle/123456789/1818.

MLA Handbook (7^th Edition):

Barros, Lívia Vieira de. “Estratégias de suplementação para fêmeas bovinas de corte em diferentes fases do ciclo produtivo.” 2012. Web. 12 Apr 2021.

Vancouver:

Barros LVd. Estratégias de suplementação para fêmeas bovinas de corte em diferentes fases do ciclo produtivo. [Internet] [Doctoral dissertation]. Federal University of Viçosa; 2012. [cited 2021 Apr 12]. Available from: http://locus.ufv.br/handle/123456789/1818.

Council of Science Editors:

Barros LVd. Estratégias de suplementação para fêmeas bovinas de corte em diferentes fases do ciclo produtivo. [Doctoral Dissertation]. Federal University of Viçosa; 2012. Available from: http://locus.ufv.br/handle/123456789/1818

Montana State University

24. Byerley, Darryl Jay. Fertility of non-puberal estrus, pregnancy rates and progesterone concentrations of beef heifers bred at puberal or third estrus.

Degree: MS, College of Agriculture, 1987, Montana State University

URL: https://scholarworks.montana.edu/xmlui/handle/1/5264

Subjects/Keywords: Beef cattle; Heifers; Estrus; Animal breeding

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APA (6^th Edition):

Byerley, D. J. (1987). Fertility of non-puberal estrus, pregnancy rates and progesterone concentrations of beef heifers bred at puberal or third estrus. (Masters Thesis). Montana State University. Retrieved from https://scholarworks.montana.edu/xmlui/handle/1/5264

Chicago Manual of Style (16^th Edition):

Byerley, Darryl Jay. “Fertility of non-puberal estrus, pregnancy rates and progesterone concentrations of beef heifers bred at puberal or third estrus.” 1987. Masters Thesis, Montana State University. Accessed April 12, 2021. https://scholarworks.montana.edu/xmlui/handle/1/5264.

MLA Handbook (7^th Edition):

Byerley, Darryl Jay. “Fertility of non-puberal estrus, pregnancy rates and progesterone concentrations of beef heifers bred at puberal or third estrus.” 1987. Web. 12 Apr 2021.

Vancouver:

Byerley DJ. Fertility of non-puberal estrus, pregnancy rates and progesterone concentrations of beef heifers bred at puberal or third estrus. [Internet] [Masters thesis]. Montana State University; 1987. [cited 2021 Apr 12]. Available from: https://scholarworks.montana.edu/xmlui/handle/1/5264.

Council of Science Editors:

Byerley DJ. Fertility of non-puberal estrus, pregnancy rates and progesterone concentrations of beef heifers bred at puberal or third estrus. [Masters Thesis]. Montana State University; 1987. Available from: https://scholarworks.montana.edu/xmlui/handle/1/5264

University of Arkansas

25. Page, Ryan James. Associations Among Beef Cattle Genotypes, Neospora Caninum Infection, and Reproductive Performance.

Degree: PhD, 2020, University of Arkansas

URL: https://scholarworks.uark.edu/etd/3703

► Reproductive performance is crucial for sustained financial success in the beef cattle industry. This dissertation includes a population study that quantified the incidence of… (more)

▼ Reproductive performance is crucial for sustained financial success in the beef cattle industry. This dissertation includes a population study that quantified the incidence of Neospora caninum infections in the central region of the United States and tested its relationship with reproductive performance in beef cattle. Trial one of that study concluded that 6.9% of open, replacement heifers (n = 1306) tested seropositive. The second trial in that project found that 9.6% of the breeding age females (n = 500) tested were seropositive for Neospora caninum; and that state in which the cattle lived and age impacted (P < 0.05) infection rate. Breed composition, number of farm dogs on the ranch, and use of total mixed rations were not associated (P > 0.1) with seropositive tests. Fewer (P < 0.05) seropositive females were pregnant in Oklahoma, but overall infection rate was not associated (P > 0.1) with non-pregnant females. The second study, tested for a relationship between heat shock protein 70 (Hsp70) genotypes and reproductive characteristics. Blood samples were collected from beef heifers (n = 165) being developed for replacements and Hsp70 genotypes (A1125C, C895D, G1851A, G2033C) were determined using a commercial laboratory (Neogen Corporation; Lincoln, NE). There was an association (P = 0.04) between C895D genotype and the percentage of lymphocytes in circulation. Pelvic area, reproductive tract score, pregnancy rate, and white blood cell concentrations were affected by (P < 0.05) genotype at G2033C. Cows with heterozygous genotype for G2033C had a lower (P = 0.02) pregnancy rate; conversely, those same cows had larger (P = 0.02) PA. No associations were detected between A1125C or G1851A and the traits evaluated. While more research is needed in this area, these projects indicate that identifying Neospora caninum infected cattle and Hsp70 genotypes could be useful tools for selecting beef cattle. Advisors/Committee Members: Charles Rosenkrans, Michael Looper, Jeremy Powell.

Subjects/Keywords: Beef Heifers; Cattle; Disease; Genetics; Heat Shock Proteins; Reproduction; Animal Experimentation and Research; Animal Studies; Beef Science; Veterinary Physiology

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APA (6^th Edition):

Page, R. J. (2020). Associations Among Beef Cattle Genotypes, Neospora Caninum Infection, and Reproductive Performance. (Doctoral Dissertation). University of Arkansas. Retrieved from https://scholarworks.uark.edu/etd/3703

Chicago Manual of Style (16^th Edition):

Page, Ryan James. “Associations Among Beef Cattle Genotypes, Neospora Caninum Infection, and Reproductive Performance.” 2020. Doctoral Dissertation, University of Arkansas. Accessed April 12, 2021. https://scholarworks.uark.edu/etd/3703.

MLA Handbook (7^th Edition):

Page, Ryan James. “Associations Among Beef Cattle Genotypes, Neospora Caninum Infection, and Reproductive Performance.” 2020. Web. 12 Apr 2021.

Vancouver:

Page RJ. Associations Among Beef Cattle Genotypes, Neospora Caninum Infection, and Reproductive Performance. [Internet] [Doctoral dissertation]. University of Arkansas; 2020. [cited 2021 Apr 12]. Available from: https://scholarworks.uark.edu/etd/3703.

Council of Science Editors:

Page RJ. Associations Among Beef Cattle Genotypes, Neospora Caninum Infection, and Reproductive Performance. [Doctoral Dissertation]. University of Arkansas; 2020. Available from: https://scholarworks.uark.edu/etd/3703

Massey University

26. Khadem, Ali-Akbar. Nutritional, genetic and meat quality aspects of once-bred heifer beef production systems in New Zealand.

Degree: PhD, Animal Science, 1994, Massey University

URL: http://hdl.handle.net/10179/3002

► Issues related to the nutrition, management, carcass and meat quality traits, and the profitability of "Once-Bred Heifer" (OBH) beef production systems under New Zealand pastoral… (more)

Subjects/Keywords: Meat quality; Heifers; Beef production; Beef quality

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APA (6^th Edition):

Khadem, A. (1994). Nutritional, genetic and meat quality aspects of once-bred heifer beef production systems in New Zealand. (Doctoral Dissertation). Massey University. Retrieved from http://hdl.handle.net/10179/3002

Chicago Manual of Style (16^th Edition):

Khadem, Ali-Akbar. “Nutritional, genetic and meat quality aspects of once-bred heifer beef production systems in New Zealand.” 1994. Doctoral Dissertation, Massey University. Accessed April 12, 2021. http://hdl.handle.net/10179/3002.

MLA Handbook (7^th Edition):

Khadem, Ali-Akbar. “Nutritional, genetic and meat quality aspects of once-bred heifer beef production systems in New Zealand.” 1994. Web. 12 Apr 2021.

Vancouver:

Khadem A. Nutritional, genetic and meat quality aspects of once-bred heifer beef production systems in New Zealand. [Internet] [Doctoral dissertation]. Massey University; 1994. [cited 2021 Apr 12]. Available from: http://hdl.handle.net/10179/3002.

Council of Science Editors:

Khadem A. Nutritional, genetic and meat quality aspects of once-bred heifer beef production systems in New Zealand. [Doctoral Dissertation]. Massey University; 1994. Available from: http://hdl.handle.net/10179/3002

Texas A&M University

27. Chantong, Rawat. Relationships among body size, pubertal characters and pelvic dimensions of heifers of a five-breed diallel.

Degree: M.S, animal breeding, 2012, Texas A&M University

URL: http://hdl.handle.net/1969.1/ETD-TAMU-1983-THESIS-C459

Subjects/Keywords: animal breeding.; Major animal breeding.; Heifers.; Beef cattle - Weight.

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APA (6^th Edition):

Chantong, R. (2012). Relationships among body size, pubertal characters and pelvic dimensions of heifers of a five-breed diallel. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-1983-THESIS-C459

Chicago Manual of Style (16^th Edition):

Chantong, Rawat. “Relationships among body size, pubertal characters and pelvic dimensions of heifers of a five-breed diallel.” 2012. Masters Thesis, Texas A&M University. Accessed April 12, 2021. http://hdl.handle.net/1969.1/ETD-TAMU-1983-THESIS-C459.

MLA Handbook (7^th Edition):

Chantong, Rawat. “Relationships among body size, pubertal characters and pelvic dimensions of heifers of a five-breed diallel.” 2012. Web. 12 Apr 2021.

Vancouver:

Chantong R. Relationships among body size, pubertal characters and pelvic dimensions of heifers of a five-breed diallel. [Internet] [Masters thesis]. Texas A&M University; 2012. [cited 2021 Apr 12]. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-1983-THESIS-C459.

Council of Science Editors:

Chantong R. Relationships among body size, pubertal characters and pelvic dimensions of heifers of a five-breed diallel. [Masters Thesis]. Texas A&M University; 2012. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-1983-THESIS-C459

Universidade Federal de Viçosa

28. Daniel Mageste de Almeida. Suplementação com farelo de soja ou grão de soja para novilhas de corte semi precoces em pastejo.

Degree: 2013, Universidade Federal de Viçosa

URL: http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=5223

► Esse trabalho foi elaborado a partir de dois experimentos com novilhas Nelore ou mestiças com predominância de sangue nelore submetidas a diferentes estratégias de suplementação… (more)

▼ Esse trabalho foi elaborado a partir de dois experimentos com novilhas Nelore ou mestiças com predominância de sangue nelore submetidas a diferentes estratégias de suplementação a pasto. No primeiro experimento objetivou-se avaliar o efeito da substituição do farelo de soja pelo grão de soja sobre parâmetros nutricionais, eficiência de síntese microbiana e desempenho produtivo e reprodutivo de novilhas neloradas sob pastejo em Uruchloa decumbens durante o período de transição águasseca. Foram utilizadas 39 novilhas, com idade média inicial de 18 meses e peso médio inicial de 292,06 kg. O delineamento experimental foi o inteiramente casualizado, com quatro tratamentos com oito repetições, e o tratamento controle com sete repetições. Os suplementos continham 35% de proteína bruta (PB). Dois tratamentos tinham como fonte proteica o farelo de soja, e os outros dois tratamentos foram à base de substituição do farelo de soja pelo grão de soja em 100%. Os animais do grupo controle receberam apenas mistura mineral ad libitum. Os animais suplementados apresentaram ganho médio diário (GMD) superior aos animais não suplementados (P<0,10), e houve diferença de GMD entre os suplementados (P<0,10). Foi verificado efeito positivo da suplementação (P<0,10) sobre o consumo de matéria seca (MS), matéria orgânica (MO), proteína bruta (PB), extrato etéreo (EE), carboidratos não fibrosos (CNF), nutrientes digestíveis totais (NDT) e fibra em detergente neutro corrigida para cinzas e proteína (FDNcp). Não houve diferenças (P<0,10) no consumo de MO e MS de pasto entre os suplementados e os não suplementados. A suplementação melhorou a digestibilidade da MS e de todos os constituintes da dieta (P<0,10), com exceção da FDNcp (P>0,10). As novilhas atingiram o peso necessário para que houvesse a primeira concepção, porém a genética dos animais não favoreceu o início da puberdade nesta fase. Conclui-se que o fornecimento de suplemento múltiplo otimiza o desempenho de novilhas em pastejo no período de transição águas-seca, e que a substituição do farelo de soja pelo grão de soja fornecido na quantidade de 0,5 kg/animal/dia altera o desempenho produtivo dos animais. No segundo experimento, objetivou-se avaliar o efeito da substituição do farelo de soja pelo grão de soja sobre parâmetros nutricionais, eficiência de síntese microbiana e desempenho produtivo e reprodutivo de novilhas neloradas sob pastejo em Uruchloa decumbens durante o período da seca. Foram utilizadas as mesmas 39 novilhas, com idade média inicial de 21 meses e peso médio inicial de 309,57 kg. O delineamento experimental foi o inteiramente casualizado, com quatro tratamentos com oito repetições, e o tratamento controle com sete repetições. Dois tratamentos tinham como fonte proteica o farelo de soja, e dois tratamentos tinham como fonte protéica o grão de soja, contendo 25% e 40% de proteína bruta. Ofertou-se 1 kg/animal/dia de suplemento. Os animais do grupo controle receberam apenas mistura mineral ad libitum. Os animais suplementados apresentaram GMD superior aos animais não… Advisors/Committee Members: Luciana Navajas Rennó, Marcos Inácio Marcondes, Mario Luiz Chizzotti, Mário Fonseca Paulino.

Subjects/Keywords: NUTRICAO E ALIMENTACAO ANIMAL; Novilhas de corte; Soja; Farelo de soja; Soybean; Soybean meal; Beef heifers

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APA (6^th Edition):

Almeida, D. M. d. (2013). Suplementação com farelo de soja ou grão de soja para novilhas de corte semi precoces em pastejo. (Thesis). Universidade Federal de Viçosa. Retrieved from http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=5223

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Almeida, Daniel Mageste de. “Suplementação com farelo de soja ou grão de soja para novilhas de corte semi precoces em pastejo.” 2013. Thesis, Universidade Federal de Viçosa. Accessed April 12, 2021. http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=5223.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Almeida, Daniel Mageste de. “Suplementação com farelo de soja ou grão de soja para novilhas de corte semi precoces em pastejo.” 2013. Web. 12 Apr 2021.

Vancouver:

Almeida DMd. Suplementação com farelo de soja ou grão de soja para novilhas de corte semi precoces em pastejo. [Internet] [Thesis]. Universidade Federal de Viçosa; 2013. [cited 2021 Apr 12]. Available from: http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=5223.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Almeida DMd. Suplementação com farelo de soja ou grão de soja para novilhas de corte semi precoces em pastejo. [Thesis]. Universidade Federal de Viçosa; 2013. Available from: http://www.tede.ufv.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=5223

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Colorado State University

29. Bigler, Bo. Effects of monensin sodium and plant extracts containing cinnamaldehyde, capsicum oleoresin, and eugenol on days to puberty, gain, pregnancy rate, and feed efficiency in developing beef heifers receiving a high roughage diet.

Degree: MS(M.S.), Animal Sciences, 2014, Colorado State University

URL: http://hdl.handle.net/10217/82544

To view the abstract, please see the full text of the document. Advisors/Committee Members: Peel, Kraig (advisor), Ahola, Jason (advisor), Whittier, Jack (committee member), Holt, Tim (committee member).

Subjects/Keywords: average daily gain; beef heifers; monensin; plant extracts; puberty

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APA (6^th Edition):

Bigler, B. (2014). Effects of monensin sodium and plant extracts containing cinnamaldehyde, capsicum oleoresin, and eugenol on days to puberty, gain, pregnancy rate, and feed efficiency in developing beef heifers receiving a high roughage diet. (Masters Thesis). Colorado State University. Retrieved from http://hdl.handle.net/10217/82544

Chicago Manual of Style (16^th Edition):

Bigler, Bo. “Effects of monensin sodium and plant extracts containing cinnamaldehyde, capsicum oleoresin, and eugenol on days to puberty, gain, pregnancy rate, and feed efficiency in developing beef heifers receiving a high roughage diet.” 2014. Masters Thesis, Colorado State University. Accessed April 12, 2021. http://hdl.handle.net/10217/82544.

MLA Handbook (7^th Edition):

Bigler, Bo. “Effects of monensin sodium and plant extracts containing cinnamaldehyde, capsicum oleoresin, and eugenol on days to puberty, gain, pregnancy rate, and feed efficiency in developing beef heifers receiving a high roughage diet.” 2014. Web. 12 Apr 2021.

Vancouver:

Bigler B. Effects of monensin sodium and plant extracts containing cinnamaldehyde, capsicum oleoresin, and eugenol on days to puberty, gain, pregnancy rate, and feed efficiency in developing beef heifers receiving a high roughage diet. [Internet] [Masters thesis]. Colorado State University; 2014. [cited 2021 Apr 12]. Available from: http://hdl.handle.net/10217/82544.

Council of Science Editors:

Bigler B. Effects of monensin sodium and plant extracts containing cinnamaldehyde, capsicum oleoresin, and eugenol on days to puberty, gain, pregnancy rate, and feed efficiency in developing beef heifers receiving a high roughage diet. [Masters Thesis]. Colorado State University; 2014. Available from: http://hdl.handle.net/10217/82544

30. De Carvalho Cardoso, Rodolfo. Nutritional Programming of Puberty in Beef Heifers.

Degree: PhD, Physiology of Reproduction, 2014, Texas A&M University

URL: http://hdl.handle.net/1969.1/153316

► Nutritional and metabolic statuses during postnatal development control the timing of pubertal maturation in mammals. Studies reported herein had two overall aims. In Aim I,… (more)

▼ Nutritional and metabolic statuses during postnatal development control the timing of pubertal maturation in mammals. Studies reported herein had two overall aims. In Aim I, objectives were to characterize functional and morphological modifications that occur in the neuroendocrine system of prepubertal heifers in response to increased body weight (BW) gain during calfhood. We first tested the hypothesis that hypothalamic release of neuropeptide Y (NPY), an important inhibitory peptide involved in the integration of metabolism and reproduction, would be decreased in heifers that gained BW at higher rates. Confirming our hypothesis, heifers that gained 1 kg/day had lower concentrations of NPY in the third ventricle cerebrospinal fluid than heifers that gained 0.5 kg/day. These data corroborate previous results from our group that demonstrated that similar nutritional treatments result in decreased hypothalamic NPY expression and neuronal projections to gonadotropin-releasing hormone (GnRH) cells. We then tested the hypothesis that proopiomelanocortin (POMC) cells, a critical excitatory metabolic-sensing pathway in the hypothalamus, could be involved in the nutritional control of puberty. Heifers that gained BW at higher rates had greater POMC expression in the arcuate nucleus and an increased number of kisspeptin neurons innervated by fibers containing melanocyte-stimulating hormone alpha (αMSH), a product of the POMC gene. Very few GnRH neurons were observed in close apposition to αMSH fibers and these projections were not dependent on metabolic status. Results suggest that melanocortin signaling through arcuate kisspeptin neurons may be an important mechanism involved in the nutritionally-programed acceleration of puberty in heifers. In Aim II we hypothesized that metabolic programming of processes underlying puberty could be shifted temporally during calfhood through the use of a stair-step, compensatory growth model. Results indicated that nutritional restriction between 6.5 to 9 mo of age did not affect the proportion of heifers pubertal by 12 mo of age when compared to continuous accelerated BW gain. Furthermore, we observed that increasing nutrient availability between 6 and 9 mo of age may potentially time pubertal onset consistently at around 12 mo of age while avoiding precocious puberty. Therefore, similar managerial strategies may allow optimal timing of sexual maturation in replacement beef heifers. Advisors/Committee Members: Williams, Gary (advisor), Amstalden, Marcel (advisor), Johnson, Gregory (committee member), Tedeschi, Luis (committee member), Park, Chung (committee member).

Subjects/Keywords: Beef Heifers; Nutritional Programming; Puberty; POMC; NPY

…PROGRAM THE ONSET OF PUBERTY IN BEEF HEIFERS… …prepubertal beef heifers in the current study… …29 Ingredients and chemical composition of diets fed to prepubertal beef heifers between 4… …daily gain, BCS, and BW at puberty in early-weaned beef heifers receiving 1 of 4 nutritional… …in beef heifers by early-weaning calves at 3 to 4 mo of age and feeding a high energy diet…

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

De Carvalho Cardoso, R. (2014). Nutritional Programming of Puberty in Beef Heifers. (Doctoral Dissertation). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/153316

Chicago Manual of Style (16^th Edition):

De Carvalho Cardoso, Rodolfo. “Nutritional Programming of Puberty in Beef Heifers.” 2014. Doctoral Dissertation, Texas A&M University. Accessed April 12, 2021. http://hdl.handle.net/1969.1/153316.

MLA Handbook (7^th Edition):

De Carvalho Cardoso, Rodolfo. “Nutritional Programming of Puberty in Beef Heifers.” 2014. Web. 12 Apr 2021.

Vancouver:

De Carvalho Cardoso R. Nutritional Programming of Puberty in Beef Heifers. [Internet] [Doctoral dissertation]. Texas A&M University; 2014. [cited 2021 Apr 12]. Available from: http://hdl.handle.net/1969.1/153316.

Council of Science Editors:

De Carvalho Cardoso R. Nutritional Programming of Puberty in Beef Heifers. [Doctoral Dissertation]. Texas A&M University; 2014. Available from: http://hdl.handle.net/1969.1/153316

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