Data/hora: 12/06/2024 13:44:39

Provedor de dados: 	Revista Brasileira de Ciência Avícola	
País: 	Brazil	
Título: 	Performance and carcass characteristics of broiler chickens with different growth potential and submitted to heat stress	
Autores: 	Rosa,PS; Faria Filho,DE; Dahlke,F; Vieira,BS; Macari,M; Furlan,RL.	
Data: 	2007-09-01	
Ano: 	2007	
Palavras-chave: 	Allometric coefficient; Carcass yield; Genetic improvement; Heat stress.	
Resumo: 	In order to evaluate the effects of broiler genotype and of heat exposure on performance, carcass characteristics, and protein and fat accretion, six hundred one-day-old male broilers were randomly assigned in a 2 x 3 factorial arrangement, according to the following factors: genetic group (selected and non-selected broilers) and pair-feeding scheme (Ad32 - reared under heat stress and fed ad libitum; Ad23 - reared at thermoneutrality and fed ad libitum; Pf23 - reared at thermoneutrality and pair fed with Ad32), with a total of six treatments with four replicates of 25 birds each. Independent of pair-feeding scheme, selected broilers showed better feed conversion, higher carcass yield, and lower abdominal fat deposition rate. However, as compared to non-selected broilers, they reduced more intensively feed intake when heat exposed, which promoted significant breast-yield decrease, and more pronounced changes on carcass chemical composition. These findings allows concluding that, in both genetic groups, both environmental temperature and feed-intake restriction influence abdominal fat deposition rate and other carcass characteristics; however, the impact of heat exposure on broiler performance is more noticeable on the selected line.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2007000300007	
Editor: 	Fundação APINCO de Ciência e Tecnologia Avícolas	
Relação: 	10.1590/S1516-635X2007000300007	
Formato: 	text/html	
Fonte: 	Brazilian Journal of Poultry Science  v.9 n.3 2007	
Fonte: 	info:eu-repo/semantics/openAccess