Use este identificador para citar ou linkar para este item: http://www.alice.cnptia.embrapa.br/alice/handle/doc/126204
Unidade da Embrapa/Coleção:: Área de Informação da Sede - Artigo em periódico indexado (ALICE)
Data do documento: 14-Jan-2008
Tipo do Material: Artigo em periódico indexado (ALICE)
Autoria: MORAES, J.C.F.
JAUME, C.M.
SOUZA, C.J.H. de
Informaçães Adicionais: Embrapa Pecuária Sul
Título: Body condition score to predict the postpartum fertility of crossbred beef cows
Edição: 2007
Fonte/Imprenta: Pesquisa Agropecuária Brasileira, Brasília, v. 42, n.5, p. 741-746, maio 2007
Idioma: en
Palavras-chave: Bos taurus
artificial insemination
breeding season
pregnancy rates
inseminação artificial
estação reprodutiva
taxa de prenhez
Conteúdo: The relationship between changes in body condition score (BCS) during the postpartum and fertility in beef cows suckling calves under extensive conditions were investigated. Cows were subjected to four BCS evaluations over the postpartum period, starting around one month after calving. In the second evaluation cows were treated with medroxy-progesterone acetate impregnated pessaries and received an injection of estradiol benzoate. At the third evaluation, pessaries were removed and calves were separated from the cows for 96 hours, during which time estrous was observed twice a day, and animals artificially inseminated 12 hours after detection. When calves returned to their dams, bulls were introduced until a 60-day mating period was reached. The distribution of BCS differed among calving groups and evaluations. Results indicated that only cows comprising a BCS 3 (1 to 5 scale) around the first month postpartum can be used in an artificial insemination program with possibilities of becoming pregnant. There was no statistical difference between the calving groups in pregnancy rate. The evolution of the BCS of the cows during postpartum can be used to adjust the start of the breeding season to coincide with the time of the year where herd pregnancy rates will be highest.
Ano de Publicação: 2007
Aparece nas coleções:Artigo em periódico indexado (AI-SEDE) / Embrapa Informação Tecnológica (SCT)

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