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You searched for +publisher:"UNIVERSIDADE FEDERAL DE LAVRAS" +contributor:("Judas Tadeu de Barros Cotta"). Showing records 1 – 3 of 3 total matches.

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1. MÃnica PatrÃcia Maciel. Reproductive characteristics of ligth and semi-heavy roosters submitted to different photoperiods.

Degree: 2006, UNIVERSIDADE FEDERAL DE LAVRAS

With the objective of evaluating the effects of differents photoperiods on the reproductive parameters in roosters of light and semi-heavy strains, an experiment was conducted in the Animal Science Department of the Federal University of Lavras. 24 roosters of the Lohman LSL strain (light) and 24 roosters of the Lohman Brown strain (semi-heavy), aged 19 weeks were utilized, they themselves being submitted to 3 treatments: a)Photoperiod 1: Continuous; b) Photoperiod 2: Intermittent and c) Photoperiod 3: growing natural light. The birds were housed in a shelter divided into 3 environments, so that the lighting of one did not interfere upon the that of the other. The experimental period lasted 140 days and the measures were taken at 168, 203, 238 and 273 days of age of the roosters. The animals were allotted to a completely randomized experimental design in a split plot scheme, taking into account the evaluations in the different ages as measures in time. For the measures of body weight, feed intake, seminal performance and parameters, 8 animals of each strain per treatment were utilized, the experimental unit being made up of 1 animal. The variables evaluated were: feed intake (g/bird/day), body weight (g), seminal volume (ml), spermatic motility (%) and vigor (0 to 5), spermatic concentration (number of cells x 109), number of total spermatic cells (NCT- volume x concentration) and spermatic morphology (alterations of head, tail and total alterations). For the evaluations of the testicular development and histology and of the semen collected in the deferent duct, 4 animals of each strain per treatment were utilized, the experimental unit being constituted of 1 animal. The following variables were evaluated: body weight, weights of the right and left testes, total testicular weight in grams; diameter of the seminiferous tubules (DTS) and thickness of the seminiferous epithelium (EES) in m; number of cells of the seminiferous tubules (Sertoli cells; rounded spermatogonia and spermatids); motility (%), vigor (0 to 5) and spermatic concentration (number of cells x 109). The differences between treatments were compared by the Scott Knott test (5%) and the ages submitted to the analysis of regression. The light roosters submitted of continuous light showed increased ration consumption (P<0,05), there being no significant influence (P>0.05) of the photoperiods on the other variables. The semi-heavy roosters submitted of the natural photoperiod presented decreased semen production, NCT, testicular weights, EES and number of rounded spermatids. It follows that the photoperiods continuous, intermittent or growing natural light (210 14â de south latitude) can be utilized in open shelters for light roosters over the reproductive period without harming the reproductive parameters. Semi-heavy roosters can be bred under either continuous or intermittent photoperiods, but when these animals are submitted only to growing natural light, they have their reproductive parameters wronged.

Com o objetivo de avaliar os efeitos de…

Advisors/Committee Members: Francisco Duque de Mesquita Neto, Judas Tadeu de Barros Cotta, Luis David Solis Murgas, Rilke Tadeu Fonseca de Freitas, Luiz Fernando Teixeira Albino, Flamarion TenÃrio de Albuquerque.

Subjects/Keywords: luz intermitente; roosters; ZOOTECNIA; reproduÃÃo; FotoperÃodo; sÃmen; Photoperiod; intermittent lighting; reproduction, semen; galos

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

APA (6th Edition):

Maciel, M. P. (2006). Reproductive characteristics of ligth and semi-heavy roosters submitted to different photoperiods. (Thesis). UNIVERSIDADE FEDERAL DE LAVRAS. Retrieved from http://bibtede.ufla.br/tede//tde_busca/arquivo.php?codArquivo=175

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

Chicago Manual of Style (16th Edition):

Maciel, MÃnica PatrÃcia. “Reproductive characteristics of ligth and semi-heavy roosters submitted to different photoperiods.” 2006. Thesis, UNIVERSIDADE FEDERAL DE LAVRAS. Accessed August 25, 2019. http://bibtede.ufla.br/tede//tde_busca/arquivo.php?codArquivo=175.

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

MLA Handbook (7th Edition):

Maciel, MÃnica PatrÃcia. “Reproductive characteristics of ligth and semi-heavy roosters submitted to different photoperiods.” 2006. Web. 25 Aug 2019.

Vancouver:

Maciel MP. Reproductive characteristics of ligth and semi-heavy roosters submitted to different photoperiods. [Internet] [Thesis]. UNIVERSIDADE FEDERAL DE LAVRAS; 2006. [cited 2019 Aug 25]. Available from: http://bibtede.ufla.br/tede//tde_busca/arquivo.php?codArquivo=175.

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

Council of Science Editors:

Maciel MP. Reproductive characteristics of ligth and semi-heavy roosters submitted to different photoperiods. [Thesis]. UNIVERSIDADE FEDERAL DE LAVRAS; 2006. Available from: http://bibtede.ufla.br/tede//tde_busca/arquivo.php?codArquivo=175

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

2. Henrique Jorge de Freitas. AvaliaÃÃo de programa de iluminaÃÃo para poedeiras leves e semi-pesadas.

Degree: 2003, UNIVERSIDADE FEDERAL DE LAVRAS

To evaluate the effect of lighting programs for light and semi-heavy layers, two experiments at the Department of Animal Science of the Federal University of Lavras were conducted. An intermittent lighting program and another with only natural lighting on days of growing lighting as compared with a continuous program by utilizing 288 light and 192 semi-heavy layers were tested. The hens were housed in a house divided into three environments in such a way the lighting of one did not interfere with that of the other. The experimental period lasted 112 days, divided into four periods of 28 days. The design utilized was the completely randomized with restriction in the treatments and eight replicates. The means of the treatments were compared with the SNK test (5%). In the experiment with light layers, the hens of the continuous lighting program presented greater consumption of ration (P<0.05) and worse feed conversion whereas those of the natural light program, greater yield and egg mass and smaller Haugh unit. The hens in the program with intermittent lighting presented better viability (P<0.05) and less albumen height and weight of eggshell. In the experiment with semi-heavy layers, the hens of the natural light program presented less yield and egg mass in addition to poorer feed conversion. It follows that intermittent lighting program and only natural lighting on days of growing lighting for light layers in the late production may be used in open houses keeping yield without altering egg quality. Semi-heavy layers submitted to natural light present reduction in the performance, nevertheless, egg quality is kept. For these birds, intermittent lighting program enables to keep yield without altering egg quality.

Com o objetivo de avaliar o efeito de programas de iluminaÃÃo para poedeiras leves e semi-pesadas, foram realizados dois experimentos no Departamento de Zootecnia da Universidade Federal de Lavras. Foram testados um programas de iluminaÃÃo intermitente e outro com apenas iluminaÃÃo natural, em dias de luminosidade crescente, em comparaÃÃo com um programa contÃnuo utilizando 288 poedeiras leves e 192 semi-pesadas. As aves foram alojadas em galpÃo dividido em 3 ambientes, de forma que a iluminaÃÃo de um nÃo interferisse na do outro. O perÃodo experimental teve duraÃÃo de 112 dias, dividido em quatro perÃodos de 28 dias. O delineamento utilizado foi o inteiramente ao acaso, com restriÃÃo nos tratamentos, e oito repetiÃÃes. As mÃdias dos tratamentos foram comparadas pelo Teste SNK (5%). No experimento com poedeiras leves, as aves do programa de iluminaÃÃo contÃnuo apresentaram maior consumo de raÃÃo (P<0,05) e pior conversÃo alimentar, enquanto as do programa com luz natural, maior produÃÃo e massa de ovos e menor unidade Haugh. As aves do programa com iluminaÃÃo intermitente apresentaram melhor viabilidade (P<0,05) e menor altura de albÃmen e peso de casca dos ovos. No experimento com as poedeiras semi-pesadas as aves do programa luz natural apresentaram menor produÃÃo e massa de ovos alÃm de pior conversÃo…

Advisors/Committee Members: Luis David Solis Murgas, Ana Tereza de MendonÃa Viveiros, Antonio Ilson Gomes de Oliveira, Judas Tadeu de Barros Cotta, Luiz Fernando Teixeira Albino.

Subjects/Keywords: natural light; Luz natural; intermittent light; Programa de iluminaÃÃo; ZOOTECNIA; IluminaÃÃo contÃnua; IluminaÃÃo intermitente; continuous light; lighting programs; Dia subjetivo

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

APA (6th Edition):

Freitas, H. J. d. (2003). AvaliaÃÃo de programa de iluminaÃÃo para poedeiras leves e semi-pesadas. (Thesis). UNIVERSIDADE FEDERAL DE LAVRAS. Retrieved from http://bibtede.ufla.br/tede//tde_busca/arquivo.php?codArquivo=479

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

Chicago Manual of Style (16th Edition):

Freitas, Henrique Jorge de. “AvaliaÃÃo de programa de iluminaÃÃo para poedeiras leves e semi-pesadas.” 2003. Thesis, UNIVERSIDADE FEDERAL DE LAVRAS. Accessed August 25, 2019. http://bibtede.ufla.br/tede//tde_busca/arquivo.php?codArquivo=479.

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

MLA Handbook (7th Edition):

Freitas, Henrique Jorge de. “AvaliaÃÃo de programa de iluminaÃÃo para poedeiras leves e semi-pesadas.” 2003. Web. 25 Aug 2019.

Vancouver:

Freitas HJd. AvaliaÃÃo de programa de iluminaÃÃo para poedeiras leves e semi-pesadas. [Internet] [Thesis]. UNIVERSIDADE FEDERAL DE LAVRAS; 2003. [cited 2019 Aug 25]. Available from: http://bibtede.ufla.br/tede//tde_busca/arquivo.php?codArquivo=479.

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

Council of Science Editors:

Freitas HJd. AvaliaÃÃo de programa de iluminaÃÃo para poedeiras leves e semi-pesadas. [Thesis]. UNIVERSIDADE FEDERAL DE LAVRAS; 2003. Available from: http://bibtede.ufla.br/tede//tde_busca/arquivo.php?codArquivo=479

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

3. ClÃvis Eliseu Gewehr. AvaliaÃÃo de programa de iluminaÃÃo em cordonas japonesas (Coturnix japonica).

Degree: 2003, UNIVERSIDADE FEDERAL DE LAVRAS

Com o objetivo de avaliar o efeito de programas de iluminaÃÃo contÃnuo e intermitentes sobre a produÃÃo e qualidade de ovos de codornas (Coturnix coturnix) criadas em galpÃo aberto, este trabalho, realizado no Departamento de Zootecnia da Universidade Federal de Lavras â MG, utilizou 720 codornas de 36 semanas de idade, durante 5 perÃodos de 28 dias, as quais foram submetidas a 3 programas de luz em delineamento inteiramente ao acaso com restriÃÃes nos tratamentos e 12 repetiÃÃes. O programa contÃnuo contou com fotoperÃodo mÃdio de 15h30 (natural + artificial) e noite principal (escotoperÃodo) de 8h30 (Â 12 min); o programa intermitente 1 contou com iluminaÃÃo intermitente com duas fotofases fracionadas em 15h30 e com uma noite principal de 8h30 (Â 12 min); o programa intermitente 2 teve iluminaÃÃo intermitente com 3 fotofases em um perÃodo estimulatÃrio de 15h30 (duas fotofases e duas escotofases eqÃidistantes entre a luz natural) e escotoperÃodo de 8h30. Avaliou-se o consumo de raÃÃo (g/ave/dia), produÃÃo de ovos (%/ave/dia), peso dos ovos (g), conversÃo alimentar expressa por peso de ovo (g/g) e por dÃzia (g/dz), massa (g), perda de ovos (%), distribuiÃÃo da postura (%ovos/2h), viabilidade (%), peso especÃfico (g/cm3), altura do albÃmem (mm), peso (g), rendimento (%) e espessura da casca (mm), Ãndice gonadossomÃtico (%) e hepatossomÃtico (%) sendo as mÃdias comparadas pelo teste SNK (5%). A perda de ovos (%) e a viabilidade das aves (%) foram comparadas pela anÃlise de deviÃnce. Os resultados das aves nos diferentes programas apresentaram-se semelhantes (P>0,05) para postura, peso dos ovos, massa de ovos, perda, conversÃo alimentar/dÃzia de ovos, peso especÃfico, altura de albÃmem, peso de casca e rendimento da casca. As codornas no programa intermitente 1 apresentaram menor (P<0,05) consumo de raÃÃo e conversÃo alimentar/peso de ovo em relaÃÃo Ãs aves dos demais programas. Os ovos e as aves no intermitente 2 apresentaram maior (P <0,05) espessura de casca e Ãndice gonadossomatico que no contÃnuo, sendo que, os ovos no intermitente 1 foram semelhantes (P>0,05) aos dos demais programas. O Ãndice hepatossomÃtico das aves no programa intermitente 2 foi maior (P<0,05) e a viabilidade foi menor (P>0,05) em relaÃÃo as aves nos demais programas. A distribuiÃÃo da postura nÃo foi alterada. O uso de programas de iluminaÃÃo intermitente a partir da 36Â semana de idade reduz o tempo da iluminaÃÃo artificial; nÃo afeta o desempenho zootÃcnico, mas, o consumo de raÃÃo e a conversÃo alimentar expressa pelo peso de ovo pode ser reduzido com o programa intermitente 1. A qualidade dos ovos e suas caracterÃsticas gerais sÃo mantidas em regimes intermitentes, entretanto, a espessura de casca pode ser melhorada com o regime intermitente 2.

To evaluate the effect of continuous and intermittent lighting programs on the production and quality of eggs of quails (Coturnix coturnix) rearing in open shelter, a trial was conducted at Animal Science Department of UFLA - Lavras â MG - Brazil, with 720 quails 36 weeks age old, during 5…

Advisors/Committee Members: Antonio Ilson Gomes de Oliveira, Judas Tadeu de Barros Cotta, Luiz Fernando Teixeira Albino, Raimundo Vicente de Sousa, Ana Tereza de MendonÃa Viveiros.

Subjects/Keywords: Programa de luz; quails; light program; IluminaÃÃo intermitente; ZOOTECNIA; egging; Codorna; photoperiod; FotoperÃodo; Postura; intermittent lighting

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

APA (6th Edition):

Gewehr, C. E. (2003). AvaliaÃÃo de programa de iluminaÃÃo em cordonas japonesas (Coturnix japonica). (Thesis). UNIVERSIDADE FEDERAL DE LAVRAS. Retrieved from http://bibtede.ufla.br/tede//tde_busca/arquivo.php?codArquivo=484

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

Chicago Manual of Style (16th Edition):

Gewehr, ClÃvis Eliseu. “AvaliaÃÃo de programa de iluminaÃÃo em cordonas japonesas (Coturnix japonica).” 2003. Thesis, UNIVERSIDADE FEDERAL DE LAVRAS. Accessed August 25, 2019. http://bibtede.ufla.br/tede//tde_busca/arquivo.php?codArquivo=484.

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

MLA Handbook (7th Edition):

Gewehr, ClÃvis Eliseu. “AvaliaÃÃo de programa de iluminaÃÃo em cordonas japonesas (Coturnix japonica).” 2003. Web. 25 Aug 2019.

Vancouver:

Gewehr CE. AvaliaÃÃo de programa de iluminaÃÃo em cordonas japonesas (Coturnix japonica). [Internet] [Thesis]. UNIVERSIDADE FEDERAL DE LAVRAS; 2003. [cited 2019 Aug 25]. Available from: http://bibtede.ufla.br/tede//tde_busca/arquivo.php?codArquivo=484.

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

Council of Science Editors:

Gewehr CE. AvaliaÃÃo de programa de iluminaÃÃo em cordonas japonesas (Coturnix japonica). [Thesis]. UNIVERSIDADE FEDERAL DE LAVRAS; 2003. Available from: http://bibtede.ufla.br/tede//tde_busca/arquivo.php?codArquivo=484

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

.