Data/hora: 22/06/2024 20:55:52

Biblioteca(s): 	Embrapa Pantanal.	
Data corrente: 	23/08/1995	
Data da última atualização: 	23/08/1995	
Autoria: 	WILLIS, M. B.; WILSON, A.	
Título: 	Comparative reproductive performance of Brahman and Santa Gertrudis cattle in a hot humid environment.	
Ano de publicação: 	1974	
Fonte/Imprenta: 	Animal Production, v.18, p.35-42, 1974.	
Idioma: 	Inglês	
Conteúdo: 	In a 15-year period (1956-1970) data were available from 192 Brahman cows exposed to
bulls on 1409 occasions (1199 calvings) and from 155 Santa Gertrudis cows exposed 907
times (847 calving). All were mated by natural service in the same herd in Cuba. Calving 
percentage and net calf crop signifiantly favoured the Santa Gertrudis with overal means of 92.7 and 85.3% for the two traits respectively. Parity, lactation status and year of  cal-
ving significantly affected calving percentage with significant year x breed and status x parity interactions. Lactation status, year of calving, breed x year and status x parity inte-
ractions also affected net calf crop. Calf mortality was 6.41% in Brahmans and 5.64% in Santa Gertrudis but more of the latter breed were stillborn (41.7 v. 16.9% of all deaths). There were no breed effects on age a first or last calving age at culling or calves per cow
which were 38.5 months, 117-1 months, 130.1 months and 6.62 calves in Brahmans and
39.3, 111.5, 123.2 and 6.58 rerspectively in Santa Gertrudis. Twinning percentage was low (under 0.4%) and male births high (53-54%) in both breeds. Some 30% of cows a least
one calf prior to weaning during their lifetime.	
Palavras-Chave: 	Bovine; Comparative reproductive; Hot humid environment; Meio ambiente quente e umido; Reproducao comparativa.	
Thesagro: 	Bovino.	
Thesaurus Nal: 	Brahman; Santa Gertrudis.	
Categoria do assunto: 	--	
Registro original: 	Embrapa Pantanal (CPAP)	
Exemplares: 	CPAP - (29341-1) - ADD - SP - -- - SP0961 -  - 0961 - DIS