Serum levels of testosterone and performance  of surgical or immunocastrated beef steers

Machado, Diego Soares; Alves Filho, Dari Celestino; Argenta, Flânia Mônego; Brondani, Ivan Luiz; Martini, Ana Paula Machado

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dc.creator	Machado, Diego Soares
dc.creator	Alves Filho, Dari Celestino
dc.creator	Argenta, Flânia Mônego
dc.creator	Brondani, Ivan Luiz
dc.creator	Martini, Ana Paula Machado
dc.date	2018-11-04
dc.date.accessioned	2023-03-30T19:35:05Z
dc.date.available	2023-03-30T19:35:05Z
dc.identifier	https://comunicatascientiae.com.br/comunicata/article/view/2498
dc.identifier	10.14295/cs.v9i3.2498
dc.identifier.uri	https://biblioteca-repositorio.clacso.edu.ar/handle/CLACSO/246761
dc.description	The objective of the present study was to evaluate the serum concentration of testosterone and the performance of beef steers submitted to different surgical or immunological castration strategies. Forty- eight Aberdeen Angus calves were randomly distributed in the following treatments: surgical castrated at birth; surgical castrated at weaning; immunocastrated with three doses of Bopriva® vaccine; immunocastrated with four doses of Bopriva® vaccine. The hormonal dosages were performed through ELISA Test by “In vitro” competition. The weighing and body condition score of the animals were determined at the beginning and at the end of each evaluated phase. The completely randomly experimental design was used. Data were submitted to variance analysis by F test, being the averages compared by Tukey test with α=0.05. There was an interaction between treatment and collection date (P<0.05) for the serum levels of testosterone. By occasion of the slaughter, all the animals presented a similar serum concentration of testosterone, characterizing them as castrated. Animals immunological castrated with three doses of Bopriva® presented higher daily average gain and total weight gain on finishing phase than the ones surgical castrated at weaning. The immunological castration shows a viable alternative in relation to surgical castration.	en-US
dc.description	The objective of the present study was to evaluate the serum concentration of testosterone and the performance of beef steers submitted to different surgical or immunological castration strategies. Forty- eight Aberdeen Angus calves were randomly distributed in the following treatments: surgical castrated at birth; surgical castrated at weaning; immunocastrated with three doses of Bopriva® vaccine; immunocastrated with four doses of Bopriva® vaccine. The hormonal dosages were performed through ELISA Test by “In vitro” competition. The weighing and body condition score of the animals were determined at the beginning and at the end of each evaluated phase. The completely randomly experimental design was used. Data were submitted to variance analysis by F test, being the averages compared by Tukey test with α=0.05. There was an interaction between treatment and collection date (P<0.05) for the serum levels of testosterone. By occasion of the slaughter, all the animals presented a similar serum concentration of testosterone, characterizing them as castrated. Animals immunological castrated with three doses of Bopriva® presented higher daily average gain and total weight gain on finishing phase than the ones surgical castrated at weaning. The immunological castration shows a viable alternative in relation to surgical castration.	pt-BR
dc.format	application/pdf
dc.format	application/pdf
dc.format	application/pdf
dc.language	eng
dc.publisher	Federal University of Piauí	en-US
dc.relation	https://comunicatascientiae.com.br/comunicata/article/view/2498/561
dc.relation	https://comunicatascientiae.com.br/comunicata/article/view/2498/705
dc.relation	https://comunicatascientiae.com.br/comunicata/article/view/2498/753
dc.rights	Copyright (c) 2018 Diego Soares Machado, Dari Celestino Alves Filho, Flânia Mônego Argenta, Ivan Luiz Brondani, Ana Paula Machado Martini	en-US
dc.source	Comunicata Scientiae; Vol. 9 No. 3 (2018); 303-311	en-US
dc.source	Comunicata Scientiae; v. 9 n. 3 (2018); 303-311	pt-BR
dc.source	2177-5133
dc.source	2176-9079
dc.subject	beef cattle	en-US
dc.subject	Bopriva®	en-US
dc.subject	daily weight gain	en-US
dc.subject	finishing	en-US
dc.subject	methods of castration	en-US
dc.title	Serum levels of testosterone and performance of surgical or immunocastrated beef steers	en-US
dc.title	Serum levels of testosterone and performance of surgical or immunocastrated beef steers	pt-BR
dc.type	info:eu-repo/semantics/article
dc.type	info:eu-repo/semantics/publishedVersion