Data/hora: 21/09/2024 02:02:16

Biblioteca(s): 	Embrapa Pantanal.	
Data corrente: 	18/02/2015	
Data da última atualização: 	29/01/2016	
Autoria: 	OLIVEIRA, N. M. de; REZENDE, M. P. G. de; ABREU, U. G. P. de; ROSA, A. do N.; STERZA, F. de A. M.; LEÃO FIALHO, A. L.	
Afiliação: 	NICÁCIA MONTEIRO DE OLIVEIRA, UEMS; MARCOS PAULO GONÇALVES DE REZENDE, UEMS; URBANO GOMES PINTO DE ABREU, CPAP; ANTONIO DO NASCIMENTO ROSA, CNPGC; FABIANA DE ANDRADE MELO STERZA, UEMS; ANDRÉ LUIZ LEÃO FIALHO, UEMS.	
Título: 	Environmental effects on reproductive performance of Nellore cows widely raised in the Cerrado/Pantanal ecotone.	
Ano de publicação: 	2015	
Fonte/Imprenta: 	Acta Scientiarum. Animal Sciences, Maringá, v. 37, n. 1, p. 77-82, jan.-mar., 2015.	
ISSN: 	1806-8672	
Idioma: 	Inglês	
Conteúdo: 	We analyzed the pregnancy rate (PR) and birth rate (BR) of Nellore cows raised extensively in the Cerrado/Pantanal during 4 mating seasons (2009?2012), assessing the relationship with the temperature and humidity index (THI) and the effect of the year and breeding season. We used information from 2,116 cows, which were categorized as either multiparous (n = 1430), primiparous (n = 338), or nulliparous (n = 348). In the months of the breeding season (December?February), temperature and relative humidity data were collected to calculate the temperature and humidity index (THI). An ANOVA was performed with a model that included sources of variation from the fixed effects of category of cow and year on PR and BR; and a linear regression analysis and correlation between THI and PR and BR. We observed a significant effect (p < 0.05) on PR. We classified the average across breeding seasons as a moderate THI. The THI of the breeding seasons showed high and significant (p < 0.05) effects only on the nulliparous BR, and low values in other categories. It is concluded that the seasonal THI was not related to the performance of cows, except BR in nulliparous cows.	
Palavras-Chave: 	Bovino de corte; Efeito ambiental; Environmental effect.	
Thesagro: 	Eficiência Reprodutiva; Gado nelore; Matriz; Prenhez; Reprodução animal.	
Thesaurus Nal: 	beef cattle; reproductive efficiency.	
Categoria do assunto: 	L Ciência Animal e Produtos de Origem Animal	
Registro original: 	Embrapa Pantanal (CPAP)	
Exemplares: 	CPAP - (59264-1) - UPC - AP - PP - SP18042 -  - 18042 - DIS