Fetal sex influence in the productive performance of dairy cows
Autor(a) principal: | |
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Data de Publicação: | 2016 |
Outros Autores: | , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Semina. Ciências Agrárias (Online) |
Texto Completo: | https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/23321 |
Resumo: | Investigating factors that could affect milk production of cows is an important way to improve the efficiency of production systems. This purpose of this study was to verify and quantify the influence of calf sex on milk production and lactation length in herds of Holstein, Gir, and Guzera cows. Data from 10,780 lactations of 4,807 Holstein cows that calved between 2001 and 2013; 18,898 lactations of 13,172 Gir cows that calved between 1985 and 2013; and 5,277 lactations of 3,972 Guzera cows that calved between 1987 and 2013 were used. Both the accumulated 305-day milk yield (P305) and the length of the lactation period up to 305 days (DL305) were evaluated. Analysis of variance was performed by the least squares method using the GLM procedure in the SAS statistical program. The P305 was not influenced by the sex of the calf in the Holstein breed. However in the zebu breeds (Gir and Guzera), both P305 and DL305 were significantly affected (P < 0.01) by the sex of the calf, with higher production and average length of lactation in cows that calved males. In addition, a significant difference was also nested within sex of calf and age at first calving (P < 0.05) in the Gir breed. The results indicate that for the zebu breeds, calf sex influences production characteristics. |
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Semina. Ciências Agrárias (Online) |
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Fetal sex influence in the productive performance of dairy cowsInfluência do sexo do bezerro no desempenho produtivo de vacas leiteirasMilk productionLactationLactation length.Produção de leiteLactaçãoDuração da lactação.Investigating factors that could affect milk production of cows is an important way to improve the efficiency of production systems. This purpose of this study was to verify and quantify the influence of calf sex on milk production and lactation length in herds of Holstein, Gir, and Guzera cows. Data from 10,780 lactations of 4,807 Holstein cows that calved between 2001 and 2013; 18,898 lactations of 13,172 Gir cows that calved between 1985 and 2013; and 5,277 lactations of 3,972 Guzera cows that calved between 1987 and 2013 were used. Both the accumulated 305-day milk yield (P305) and the length of the lactation period up to 305 days (DL305) were evaluated. Analysis of variance was performed by the least squares method using the GLM procedure in the SAS statistical program. The P305 was not influenced by the sex of the calf in the Holstein breed. However in the zebu breeds (Gir and Guzera), both P305 and DL305 were significantly affected (P < 0.01) by the sex of the calf, with higher production and average length of lactation in cows that calved males. In addition, a significant difference was also nested within sex of calf and age at first calving (P < 0.05) in the Gir breed. The results indicate that for the zebu breeds, calf sex influences production characteristics.A investigação de fatores que interferem na produção de vacas leiteiras é de grande importância para eficiência dos sistemas de produção. O objetivo do trabalho foi verificar e quantificar a influência do sexo do bezerro sobre produção de leite e sobre a duração da lactação em rebanhos das raças Holandesa, Gir Leiteiro e Guzerá. Foram avaliadas 10.780 lactações de 4.807 vacas Holandesas, paridas entre 2001 e 2013; 18.898 lactações de 13.172 vacas Gir Leiteiro paridas de 1985 a 2013 e 5.277 lactações ocorridas entre 1987 e 2013, de 3.972 vacas Guzerá. As características estudadas foram produção de leite acumulada em 305 dias e duração da lactação (até 305 dias). A análise de variância foi realizada pelo método de quadrados mínimos, através do procedimento GLM do programa estatístico SAS. A produção de leite acumulada aos 305 dias (P305) na raça Holandesa não foi influenciada pelo sexo do bezerro. Entretanto, para os animais de origem zebuína (Gir leiteiro e Guzerá), ambas as características foram significativamente influenciadas (P < 0,01) pelo sexo do bezerro, sendo observadas maiores produções de leite e duração de lactação para vacas que pariram machos. Também foi observada diferença significativa do sexo do bezerro aninhado dentro de idade da vaca ao parto (P < 0,05) para a raça Gir leiteiro. Estes resultados indicam que para as raças zebuínas, o sexo do bezerro influenciou as características de produção.UEL2016-09-02info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionPesquisa Históricaapplication/pdfhttps://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/2332110.5433/1679-0359.2016v37n4Supl1p2549Semina: Ciências Agrárias; Vol. 37 No. 4Supl1 (2016); 2549-2556Semina: Ciências Agrárias; v. 37 n. 4Supl1 (2016); 2549-25561679-03591676-546Xreponame:Semina. Ciências Agrárias (Online)instname:Universidade Estadual de Londrina (UEL)instacron:UELenghttps://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/23321/19602http://creativecommons.org/licenses/by-nc/4.0info:eu-repo/semantics/openAccessFreitas, Anielly de PaulaGama, Manuela Pires Monteiro daSantos, Guilherme Felipe Ferreira dosMendonça, Gabriela GeraldiPereira, Mariana AlencarVercesi Filho, Aníbal EugênioPaz, Claudia Cristina Paro deZadra, Lenira El Faro2022-11-30T15:21:39Zoai:ojs.pkp.sfu.ca:article/23321Revistahttp://www.uel.br/revistas/uel/index.php/semagrariasPUBhttps://ojs.uel.br/revistas/uel/index.php/semagrarias/oaisemina.agrarias@uel.br1679-03591676-546Xopendoar:2022-11-30T15:21:39Semina. Ciências Agrárias (Online) - Universidade Estadual de Londrina (UEL)false |
dc.title.none.fl_str_mv |
Fetal sex influence in the productive performance of dairy cows Influência do sexo do bezerro no desempenho produtivo de vacas leiteiras |
title |
Fetal sex influence in the productive performance of dairy cows |
spellingShingle |
Fetal sex influence in the productive performance of dairy cows Freitas, Anielly de Paula Milk production Lactation Lactation length. Produção de leite Lactação Duração da lactação. |
title_short |
Fetal sex influence in the productive performance of dairy cows |
title_full |
Fetal sex influence in the productive performance of dairy cows |
title_fullStr |
Fetal sex influence in the productive performance of dairy cows |
title_full_unstemmed |
Fetal sex influence in the productive performance of dairy cows |
title_sort |
Fetal sex influence in the productive performance of dairy cows |
author |
Freitas, Anielly de Paula |
author_facet |
Freitas, Anielly de Paula Gama, Manuela Pires Monteiro da Santos, Guilherme Felipe Ferreira dos Mendonça, Gabriela Geraldi Pereira, Mariana Alencar Vercesi Filho, Aníbal Eugênio Paz, Claudia Cristina Paro de Zadra, Lenira El Faro |
author_role |
author |
author2 |
Gama, Manuela Pires Monteiro da Santos, Guilherme Felipe Ferreira dos Mendonça, Gabriela Geraldi Pereira, Mariana Alencar Vercesi Filho, Aníbal Eugênio Paz, Claudia Cristina Paro de Zadra, Lenira El Faro |
author2_role |
author author author author author author author |
dc.contributor.author.fl_str_mv |
Freitas, Anielly de Paula Gama, Manuela Pires Monteiro da Santos, Guilherme Felipe Ferreira dos Mendonça, Gabriela Geraldi Pereira, Mariana Alencar Vercesi Filho, Aníbal Eugênio Paz, Claudia Cristina Paro de Zadra, Lenira El Faro |
dc.subject.por.fl_str_mv |
Milk production Lactation Lactation length. Produção de leite Lactação Duração da lactação. |
topic |
Milk production Lactation Lactation length. Produção de leite Lactação Duração da lactação. |
description |
Investigating factors that could affect milk production of cows is an important way to improve the efficiency of production systems. This purpose of this study was to verify and quantify the influence of calf sex on milk production and lactation length in herds of Holstein, Gir, and Guzera cows. Data from 10,780 lactations of 4,807 Holstein cows that calved between 2001 and 2013; 18,898 lactations of 13,172 Gir cows that calved between 1985 and 2013; and 5,277 lactations of 3,972 Guzera cows that calved between 1987 and 2013 were used. Both the accumulated 305-day milk yield (P305) and the length of the lactation period up to 305 days (DL305) were evaluated. Analysis of variance was performed by the least squares method using the GLM procedure in the SAS statistical program. The P305 was not influenced by the sex of the calf in the Holstein breed. However in the zebu breeds (Gir and Guzera), both P305 and DL305 were significantly affected (P < 0.01) by the sex of the calf, with higher production and average length of lactation in cows that calved males. In addition, a significant difference was also nested within sex of calf and age at first calving (P < 0.05) in the Gir breed. The results indicate that for the zebu breeds, calf sex influences production characteristics. |
publishDate |
2016 |
dc.date.none.fl_str_mv |
2016-09-02 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Pesquisa Histórica |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/23321 10.5433/1679-0359.2016v37n4Supl1p2549 |
url |
https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/23321 |
identifier_str_mv |
10.5433/1679-0359.2016v37n4Supl1p2549 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/23321/19602 |
dc.rights.driver.fl_str_mv |
http://creativecommons.org/licenses/by-nc/4.0 info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
http://creativecommons.org/licenses/by-nc/4.0 |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
UEL |
publisher.none.fl_str_mv |
UEL |
dc.source.none.fl_str_mv |
Semina: Ciências Agrárias; Vol. 37 No. 4Supl1 (2016); 2549-2556 Semina: Ciências Agrárias; v. 37 n. 4Supl1 (2016); 2549-2556 1679-0359 1676-546X reponame:Semina. Ciências Agrárias (Online) instname:Universidade Estadual de Londrina (UEL) instacron:UEL |
instname_str |
Universidade Estadual de Londrina (UEL) |
instacron_str |
UEL |
institution |
UEL |
reponame_str |
Semina. Ciências Agrárias (Online) |
collection |
Semina. Ciências Agrárias (Online) |
repository.name.fl_str_mv |
Semina. Ciências Agrárias (Online) - Universidade Estadual de Londrina (UEL) |
repository.mail.fl_str_mv |
semina.agrarias@uel.br |
_version_ |
1799306074995556352 |