Effects on performance and carcass and meat quality attributes following immunocastration with the gonadotropin releasing factor vaccine bopriva or surgical castration of bos indicus bulls raised on pasture in brazil

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Data

2013-09-01

Autores

Amatayakul-Chantler, S.
Hoe, F.
Jackson, J. A.
Roça, Roberto de Oliveira [UNESP]
Stegner, J. E.
King, V.
Howard, R.
Lopez, E.
Walker, J.

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Resumo

Bos indicus bulls 20. months of age grazed on pasture in Minas Gerais, Brazil either received 2 doses of the GnRF vaccine Bopriva at d0 and d91 (group IC, n. =. 144) or were surgically castrated on d91 (group SC, n. =. 144). Slaughter on d280, was 27. weeks after castration. Adverse safety issues in 8% of group SC bulls following surgery contrasted with 0% in group IC bulls. At d105 testosterone levels were suppressed to similar levels in both groups. Importantly, group IC bulls had higher live weight, hot carcass weight, ADG (P<. 0.005) and dressing percentage (P<. 0.0001) compared to group SC animals. There were no negative effects on carcass or meat quality traits, thus immunocastration was concluded to offer a safe and effective method that provides production gains, and improves animal welfare in Bos indicus beef bulls without impacting meat and carcass quality. © 2013 Elsevier Ltd.

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Palavras-chave

Bopriva, Bos indicus, GnRF vaccine, Immunocastration, Meat quality, Nelore, Agriculture, Animals, Meats, Surgery, Vaccines

Como citar

Meat Science, v. 95, n. 1, p. 78-84, 2013.