Data/hora: 02/06/2024 11:40:07

Provedor de dados: 	45	
País: 	Brazil	
Título: 	Influence of climatic conditions on in vitro production of bovine embryos	
Autores: 	Pessoa,G.A; Navarro,R.B; Rauber,L.P; Brass,K.E; Silva,C.A.M; Rubin,M.I.B.	
Data: 	2010-12-01	
Ano: 	2010	
Palavras-chave: 	Cow; Oocytes; Embryo; Climate; In vitro prodution.	
Resumo: 	Temperature and rainfall were analyzed daily during six years to evaluate their influence on in vitro production of bovine embryos. Weekly replications (n=480) were performed on 14,778 ovaries collected at slaughterhouses. Cumulus oocyte complexes (n=19,180) were fertilized with a pool of Bos taurus taurus semen in one incubator with 5% CO2. Presumable zygotes were cultured in gasified plastic bags with 5% CO2, 5% O2, and 90% N2. In the first year, cleavage and embryo yield were 60.3% and 15.6%, respectively, being lower (P&lt;0.05) than in the following years. Average cleavage rates were always lower in winter (P&lt;0.0001), thus producing less embryos. Winter climatic conditions had a negative influence on in vitro production, when cleavage and embryo yield declined, possibly because of reduced availability and growth of native pasture.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352010000600013	
Editor: 	Universidade Federal de Minas Gerais, Escola de Veterinária	
Relação: 	10.1590/S0102-09352010000600013	
Formato: 	text/html	
Fonte: 	Arquivo Brasileiro de Medicina Veterinária e Zootecnia  v.62 n.6 2010	
Fonte: 	info:eu-repo/semantics/openAccess