Ambiental factors and sex effects on calving interval of Nelore females
Autor(a) principal: | |
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Data de Publicação: | 2014 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Pesquisa Agropecuária Brasileira (Online) |
Texto Completo: | https://seer.sct.embrapa.br/index.php/pab/article/view/15399 |
Resumo: | Studying the calving interval of Nelore females, the following variables were determined: calf sex, year and month of previous calving, and calving parity. Based on the multiple regression analysis by the stepwise method, only the three last variables did significantly affect the dependent variable calving interval. From a total of 1,255 observations the average interval was 13,65 ± 3,7 months with CV = 24%. The year of previous calving determined a negative linear curve for intervals, while the month of previous calving and calving parity affected the intervals in a negative guadratic way. Food and reproductive management seemed to explain the result obtained during the five years studied. |
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Ambiental factors and sex effects on calving interval of Nelore femalesFatores ambientais e efeitos do sexo no intervalo entre partos de fêmeas Nelorereproductive; efficiency bovine cattleeficiência reprodutiva; bovinosStudying the calving interval of Nelore females, the following variables were determined: calf sex, year and month of previous calving, and calving parity. Based on the multiple regression analysis by the stepwise method, only the three last variables did significantly affect the dependent variable calving interval. From a total of 1,255 observations the average interval was 13,65 ± 3,7 months with CV = 24%. The year of previous calving determined a negative linear curve for intervals, while the month of previous calving and calving parity affected the intervals in a negative guadratic way. Food and reproductive management seemed to explain the result obtained during the five years studied.Estudando o intervalo entre partos de fêmeas Nelore foram analisadas as seguintes variáveis; sexo dos bezerros, ano do parto anterior, mês do parto anterior e ordem de parição. Com base na análise de regressão múltipla pelo método passo-a-passo (stepwise), somente as três últimas variáveis afetaram significativamente o Intervalo entre partos. De um total de 1.255 observações o intervalo médio foi de 13,65 ± 3,7 meses, com CV = 24%. O ano do parto anterior determinou uma curva linear negativa, enquanto o mês do parto anterior e á ordem de parição afetaram o intervalo através de curva quadrática e negativa. Alimentação e manejo reprodutivo parecem explicar os resultados obtidos durante os cincos anos estudados.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraViana, Hildo ÁurioFerreira, Paulo Roberto C.2014-04-16info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/15399Pesquisa Agropecuaria Brasileira; v.18, n.8, ago. 1983; 937-942Pesquisa Agropecuária Brasileira; v.18, n.8, ago. 1983; 937-9421678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/15399/9291info:eu-repo/semantics/openAccess2014-04-16T19:06:19Zoai:ojs.seer.sct.embrapa.br:article/15399Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2014-04-16T19:06:19Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false |
dc.title.none.fl_str_mv |
Ambiental factors and sex effects on calving interval of Nelore females Fatores ambientais e efeitos do sexo no intervalo entre partos de fêmeas Nelore |
title |
Ambiental factors and sex effects on calving interval of Nelore females |
spellingShingle |
Ambiental factors and sex effects on calving interval of Nelore females Viana, Hildo Áurio reproductive; efficiency bovine cattle eficiência reprodutiva; bovinos |
title_short |
Ambiental factors and sex effects on calving interval of Nelore females |
title_full |
Ambiental factors and sex effects on calving interval of Nelore females |
title_fullStr |
Ambiental factors and sex effects on calving interval of Nelore females |
title_full_unstemmed |
Ambiental factors and sex effects on calving interval of Nelore females |
title_sort |
Ambiental factors and sex effects on calving interval of Nelore females |
author |
Viana, Hildo Áurio |
author_facet |
Viana, Hildo Áurio Ferreira, Paulo Roberto C. |
author_role |
author |
author2 |
Ferreira, Paulo Roberto C. |
author2_role |
author |
dc.contributor.none.fl_str_mv |
|
dc.contributor.author.fl_str_mv |
Viana, Hildo Áurio Ferreira, Paulo Roberto C. |
dc.subject.por.fl_str_mv |
reproductive; efficiency bovine cattle eficiência reprodutiva; bovinos |
topic |
reproductive; efficiency bovine cattle eficiência reprodutiva; bovinos |
description |
Studying the calving interval of Nelore females, the following variables were determined: calf sex, year and month of previous calving, and calving parity. Based on the multiple regression analysis by the stepwise method, only the three last variables did significantly affect the dependent variable calving interval. From a total of 1,255 observations the average interval was 13,65 ± 3,7 months with CV = 24%. The year of previous calving determined a negative linear curve for intervals, while the month of previous calving and calving parity affected the intervals in a negative guadratic way. Food and reproductive management seemed to explain the result obtained during the five years studied. |
publishDate |
2014 |
dc.date.none.fl_str_mv |
2014-04-16 |
dc.type.none.fl_str_mv |
|
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://seer.sct.embrapa.br/index.php/pab/article/view/15399 |
url |
https://seer.sct.embrapa.br/index.php/pab/article/view/15399 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
https://seer.sct.embrapa.br/index.php/pab/article/view/15399/9291 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Pesquisa Agropecuaria Brasileira Pesquisa Agropecuária Brasileira |
publisher.none.fl_str_mv |
Pesquisa Agropecuaria Brasileira Pesquisa Agropecuária Brasileira |
dc.source.none.fl_str_mv |
Pesquisa Agropecuaria Brasileira; v.18, n.8, ago. 1983; 937-942 Pesquisa Agropecuária Brasileira; v.18, n.8, ago. 1983; 937-942 1678-3921 0100-104x reponame:Pesquisa Agropecuária Brasileira (Online) instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa) instacron:EMBRAPA |
instname_str |
Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
instacron_str |
EMBRAPA |
institution |
EMBRAPA |
reponame_str |
Pesquisa Agropecuária Brasileira (Online) |
collection |
Pesquisa Agropecuária Brasileira (Online) |
repository.name.fl_str_mv |
Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
repository.mail.fl_str_mv |
pab@sct.embrapa.br || sct.pab@embrapa.br |
_version_ |
1793416660666810368 |