Castration methods in crossbred cattle raised on tropical pasture
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Outros Autores: | , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1071/AN16580 http://hdl.handle.net/11449/171057 |
Resumo: | The aim of this study was to evaluate the effects of castration methods (surgical or immunological-GnRH vaccine) on performance and carcass traits of beef cattle raised until slaughter on tropical pasture. On Day 0, 30 crossbred beef bulls (50% Aberdeen Angus × 50% Nellore) with a bodyweight (BW) of 233 ± 38 kg and age of 8 months were randomly divided into three groups: intact males (INT)-Control, surgically castrated (SUC Day 1), and immunocastrated (IMC Days 1, 84 and 237). Serum testosterone concentrations, scrotal circumference, average daily gain, and ultrasonic backfat depth were evaluated at 42-day intervals (eight evaluations). All animals were slaughtered for the evaluation of carcass traits on Day 336. The GnRH vaccine was efficient in suppressing serum testosterone concentrations (P = 0.02) and scrotal circumference (P < 0.01). No difference in performance was observed between IMC and SUC animals, in which average daily gain was reduced by 14% (P < 0.01) and final BW by 7% (P < 0.01) compared with the INT group. Regardless of the method used, castration improved carcass traits by reducing carcass drip loss during cooling (P = 0.02), by increasing hindquarter percentage (P < 0.01), and by tending to increase the proportion of noble cuts (P = 0.05) compared with the INT group. However, the surgical method was more efficient than the other treatments by increasing fat deposition in the carcass (P < 0.01). Anti-GnRH immunisation in beef cattle raised on tropical pasture can replace surgical castration, but both methods reduce performance. However, in this production system, castration could be an efficient method to add value to the carcass by increasing the hindquarter proportion and fat deposition. |
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Castration methods in crossbred cattle raised on tropical pastureanti-GnRHcarcass compositionmeat cutstropical grassultrasoundThe aim of this study was to evaluate the effects of castration methods (surgical or immunological-GnRH vaccine) on performance and carcass traits of beef cattle raised until slaughter on tropical pasture. On Day 0, 30 crossbred beef bulls (50% Aberdeen Angus × 50% Nellore) with a bodyweight (BW) of 233 ± 38 kg and age of 8 months were randomly divided into three groups: intact males (INT)-Control, surgically castrated (SUC Day 1), and immunocastrated (IMC Days 1, 84 and 237). Serum testosterone concentrations, scrotal circumference, average daily gain, and ultrasonic backfat depth were evaluated at 42-day intervals (eight evaluations). All animals were slaughtered for the evaluation of carcass traits on Day 336. The GnRH vaccine was efficient in suppressing serum testosterone concentrations (P = 0.02) and scrotal circumference (P < 0.01). No difference in performance was observed between IMC and SUC animals, in which average daily gain was reduced by 14% (P < 0.01) and final BW by 7% (P < 0.01) compared with the INT group. Regardless of the method used, castration improved carcass traits by reducing carcass drip loss during cooling (P = 0.02), by increasing hindquarter percentage (P < 0.01), and by tending to increase the proportion of noble cuts (P = 0.05) compared with the INT group. However, the surgical method was more efficient than the other treatments by increasing fat deposition in the carcass (P < 0.01). Anti-GnRH immunisation in beef cattle raised on tropical pasture can replace surgical castration, but both methods reduce performance. However, in this production system, castration could be an efficient method to add value to the carcass by increasing the hindquarter proportion and fat deposition.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)UNESP-Univ. Estadual Paulista Department of Animal ScienceAPTA-Agência Paulista de Tecnologia Dos AgronegóciosBellman Animal Nutrition (A Trouw Nutrition Co.)Agroceres MultimixUNEMAT-Universidade Do Estado Do Mato GrossoUNESP-Univ. Estadual Paulista Department of Animal ScienceFAPESP: #2013/103403FAPESP: #2016/019612Universidade Estadual Paulista (Unesp)APTA-Agência Paulista de Tecnologia Dos AgronegóciosBellman Animal Nutrition (A Trouw Nutrition Co.)Agroceres MultimixUNEMAT-Universidade Do Estado Do Mato GrossoMoreira, Aline D. [UNESP]Siqueira, Gustavo R. [UNESP]Lage, Josiane F.Benatti, João Marcos B.Moretti, Matheus H.Miguel, Giulianna Z.De Oliveira, Ivanna M.De Resende, Flávio D. [UNESP]2018-12-11T16:53:33Z2018-12-11T16:53:33Z2018-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article1307-1315http://dx.doi.org/10.1071/AN16580Animal Production Science, v. 58, n. 7, p. 1307-1315, 2018.1836-57871836-0939http://hdl.handle.net/11449/17105710.1071/AN165802-s2.0-85047730602Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengAnimal Production Science0,6370,637info:eu-repo/semantics/openAccess2021-10-23T16:16:10Zoai:repositorio.unesp.br:11449/171057Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T18:49:41.453134Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Castration methods in crossbred cattle raised on tropical pasture |
title |
Castration methods in crossbred cattle raised on tropical pasture |
spellingShingle |
Castration methods in crossbred cattle raised on tropical pasture Moreira, Aline D. [UNESP] anti-GnRH carcass composition meat cuts tropical grass ultrasound |
title_short |
Castration methods in crossbred cattle raised on tropical pasture |
title_full |
Castration methods in crossbred cattle raised on tropical pasture |
title_fullStr |
Castration methods in crossbred cattle raised on tropical pasture |
title_full_unstemmed |
Castration methods in crossbred cattle raised on tropical pasture |
title_sort |
Castration methods in crossbred cattle raised on tropical pasture |
author |
Moreira, Aline D. [UNESP] |
author_facet |
Moreira, Aline D. [UNESP] Siqueira, Gustavo R. [UNESP] Lage, Josiane F. Benatti, João Marcos B. Moretti, Matheus H. Miguel, Giulianna Z. De Oliveira, Ivanna M. De Resende, Flávio D. [UNESP] |
author_role |
author |
author2 |
Siqueira, Gustavo R. [UNESP] Lage, Josiane F. Benatti, João Marcos B. Moretti, Matheus H. Miguel, Giulianna Z. De Oliveira, Ivanna M. De Resende, Flávio D. [UNESP] |
author2_role |
author author author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) APTA-Agência Paulista de Tecnologia Dos Agronegócios Bellman Animal Nutrition (A Trouw Nutrition Co.) Agroceres Multimix UNEMAT-Universidade Do Estado Do Mato Grosso |
dc.contributor.author.fl_str_mv |
Moreira, Aline D. [UNESP] Siqueira, Gustavo R. [UNESP] Lage, Josiane F. Benatti, João Marcos B. Moretti, Matheus H. Miguel, Giulianna Z. De Oliveira, Ivanna M. De Resende, Flávio D. [UNESP] |
dc.subject.por.fl_str_mv |
anti-GnRH carcass composition meat cuts tropical grass ultrasound |
topic |
anti-GnRH carcass composition meat cuts tropical grass ultrasound |
description |
The aim of this study was to evaluate the effects of castration methods (surgical or immunological-GnRH vaccine) on performance and carcass traits of beef cattle raised until slaughter on tropical pasture. On Day 0, 30 crossbred beef bulls (50% Aberdeen Angus × 50% Nellore) with a bodyweight (BW) of 233 ± 38 kg and age of 8 months were randomly divided into three groups: intact males (INT)-Control, surgically castrated (SUC Day 1), and immunocastrated (IMC Days 1, 84 and 237). Serum testosterone concentrations, scrotal circumference, average daily gain, and ultrasonic backfat depth were evaluated at 42-day intervals (eight evaluations). All animals were slaughtered for the evaluation of carcass traits on Day 336. The GnRH vaccine was efficient in suppressing serum testosterone concentrations (P = 0.02) and scrotal circumference (P < 0.01). No difference in performance was observed between IMC and SUC animals, in which average daily gain was reduced by 14% (P < 0.01) and final BW by 7% (P < 0.01) compared with the INT group. Regardless of the method used, castration improved carcass traits by reducing carcass drip loss during cooling (P = 0.02), by increasing hindquarter percentage (P < 0.01), and by tending to increase the proportion of noble cuts (P = 0.05) compared with the INT group. However, the surgical method was more efficient than the other treatments by increasing fat deposition in the carcass (P < 0.01). Anti-GnRH immunisation in beef cattle raised on tropical pasture can replace surgical castration, but both methods reduce performance. However, in this production system, castration could be an efficient method to add value to the carcass by increasing the hindquarter proportion and fat deposition. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018-12-11T16:53:33Z 2018-12-11T16:53:33Z 2018-01-01 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1071/AN16580 Animal Production Science, v. 58, n. 7, p. 1307-1315, 2018. 1836-5787 1836-0939 http://hdl.handle.net/11449/171057 10.1071/AN16580 2-s2.0-85047730602 |
url |
http://dx.doi.org/10.1071/AN16580 http://hdl.handle.net/11449/171057 |
identifier_str_mv |
Animal Production Science, v. 58, n. 7, p. 1307-1315, 2018. 1836-5787 1836-0939 10.1071/AN16580 2-s2.0-85047730602 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Animal Production Science 0,637 0,637 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
1307-1315 |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1808128986528612352 |