Carcass traits of crossbred steers surgically castrated or immunocastrated.

Detalhes bibliográficos
Autor(a) principal: FAVERO, R.
Data de Publicação: 2016
Outros Autores: FEIJO, G. L. D., BONIN, M. N., GOMES, R. da C., MENEZES, G. R. de O., TORRES JUNIOR, R. A. de A., SURITA, L. M. A., MIZUBUTI, I. Y.
Idioma: eng
Título da fonte: Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)
Texto Completo: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1055834
Resumo: The aim of this study was to evaluate carcass traits of crossbred steers surgically castrated or immunocastrated. Steers produced along two years from mating Nellore, 1/2 Nellore x 1/2 Angus and 1/2 Nellore x 1/2 Caracu dams with Braford, Charbray and Caracu sires were raised grazing tropical grasses until 20 months of age (n = 80; 40 per treatment; five of each genetic group per treatment), finished feedlot for 4 months (n = 64; 32 per treatment; four of each genetic group per treatment), and harvested at 570 ? 63 kg of body weight. The immunocastration protocol was performed in three applications of vaccine Bopriva (Zoetis; 1 ml subcutaneous each application), targeting the complete castration effect, obtained in the 2nd dose, at 14 months of age, when was also performed surgical castration of the other steers, so that all animals were castrated at the same age. Ultrasound scanning was performed at the beginning and end of the growing period to determine ribeye area (REAi / REAf), backfat thickness (BFTi / BFTf) and rump fat thickness (RFTi / RFTf). Hot carcass weight (HCW) and carcass dressing (CD) were measured at slaughter. Following 24-h chill, Longissimus marbling score (12th-13th ribs section), carcass backfat score (BFS), REAsl and BFTsl were evaluated. Longissimus samples were analyzed for Warner Bratzler shear force (SF) following 0d and 7d aging as well as Hunter L*, a* and b* values following 7d aging. Data were analyzed under a mixed model with sire and dam genetic group (and its iteration), birth season, castration method and backgrounding paddock as fixed effects, and sire nested in sire genetic group as random effect. There were no differences on BFTi, RFTi and RFTf (P > 0.05), however, there was tendency (P < 0.10) that BFTf was higher for immunocastrated steers (3.3 vs 2.8 mm). HCW, CD, BFTsl and BFS were similar (P > 0.05) among animals. The REAsl was superior for immunocastrated steers (81.8 vs. 76.5 cm2; P < 0.05). Marbling score was higher for surgically castrated (626 vs. 582; P < 0.05) and no significant differences for SF and Hunter color values were observed among steers (P > 0.05). Immunocastration can be used as alternative for surgical castration to improve backfat thickness, however it can negatively affect marbling in crossbred steers. - See more at: https://proceedings.galoa.com.br/imas/papers/carcass-traits-of-crossbred-steers-surgically-castrated-or-immunocastrated#sthash.wVsCYEpG.dpuf
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spelling Carcass traits of crossbred steers surgically castrated or immunocastrated.MusculatureTemporary castrationGordura de touroGordura intramuscularCastração temporáriaBackfaMusculoIntramuscular fatThe aim of this study was to evaluate carcass traits of crossbred steers surgically castrated or immunocastrated. Steers produced along two years from mating Nellore, 1/2 Nellore x 1/2 Angus and 1/2 Nellore x 1/2 Caracu dams with Braford, Charbray and Caracu sires were raised grazing tropical grasses until 20 months of age (n = 80; 40 per treatment; five of each genetic group per treatment), finished feedlot for 4 months (n = 64; 32 per treatment; four of each genetic group per treatment), and harvested at 570 ? 63 kg of body weight. The immunocastration protocol was performed in three applications of vaccine Bopriva (Zoetis; 1 ml subcutaneous each application), targeting the complete castration effect, obtained in the 2nd dose, at 14 months of age, when was also performed surgical castration of the other steers, so that all animals were castrated at the same age. Ultrasound scanning was performed at the beginning and end of the growing period to determine ribeye area (REAi / REAf), backfat thickness (BFTi / BFTf) and rump fat thickness (RFTi / RFTf). Hot carcass weight (HCW) and carcass dressing (CD) were measured at slaughter. Following 24-h chill, Longissimus marbling score (12th-13th ribs section), carcass backfat score (BFS), REAsl and BFTsl were evaluated. Longissimus samples were analyzed for Warner Bratzler shear force (SF) following 0d and 7d aging as well as Hunter L*, a* and b* values following 7d aging. Data were analyzed under a mixed model with sire and dam genetic group (and its iteration), birth season, castration method and backgrounding paddock as fixed effects, and sire nested in sire genetic group as random effect. There were no differences on BFTi, RFTi and RFTf (P > 0.05), however, there was tendency (P < 0.10) that BFTf was higher for immunocastrated steers (3.3 vs 2.8 mm). HCW, CD, BFTsl and BFS were similar (P > 0.05) among animals. The REAsl was superior for immunocastrated steers (81.8 vs. 76.5 cm2; P < 0.05). Marbling score was higher for surgically castrated (626 vs. 582; P < 0.05) and no significant differences for SF and Hunter color values were observed among steers (P > 0.05). Immunocastration can be used as alternative for surgical castration to improve backfat thickness, however it can negatively affect marbling in crossbred steers. - See more at: https://proceedings.galoa.com.br/imas/papers/carcass-traits-of-crossbred-steers-surgically-castrated-or-immunocastrated#sthash.wVsCYEpG.dpufRiICARDO FAVERO, UEL; GELSON LUIS DIAS FEIJO, CNPGC; MARINA N. BONIN, UFMS; RODRIGO DA COSTA GOMES, CNPGC; GILBERTO ROMEIRO DE OLIVEIRA MENEZE, CNPGC; ROBERTO AUGUSTO DE A TORRES JUNIOR, CNPGC; LUCY M. A. SURITA, UEL; IVONE Y. MIZUBUTI, UEL.FAVERO, R.FEIJO, G. L. D.BONIN, M. N.GOMES, R. da C.MENEZES, G. R. de O.TORRES JUNIOR, R. A. de A.SURITA, L. M. A.MIZUBUTI, I. Y.2016-11-03T11:11:11Z2016-11-03T11:11:11Z2016-11-0320162017-03-07T11:11:11ZResumo em anais e proceedingsinfo:eu-repo/semantics/publishedVersionInternational Meeting of Advances in Animal Science, 2016., Jaboticabal. Anais... Jaboticabal: UNESP, 2016.http://www.alice.cnptia.embrapa.br/alice/handle/doc/1055834enginfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPA2017-08-15T23:55:35Zoai:www.alice.cnptia.embrapa.br:doc/1055834Repositório InstitucionalPUBhttps://www.alice.cnptia.embrapa.br/oai/requestcg-riaa@embrapa.bropendoar:21542017-08-15T23:55:35Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false
dc.title.none.fl_str_mv Carcass traits of crossbred steers surgically castrated or immunocastrated.
title Carcass traits of crossbred steers surgically castrated or immunocastrated.
spellingShingle Carcass traits of crossbred steers surgically castrated or immunocastrated.
FAVERO, R.
Musculature
Temporary castration
Gordura de touro
Gordura intramuscular
Castração temporária
Backfa
Musculo
Intramuscular fat
title_short Carcass traits of crossbred steers surgically castrated or immunocastrated.
title_full Carcass traits of crossbred steers surgically castrated or immunocastrated.
title_fullStr Carcass traits of crossbred steers surgically castrated or immunocastrated.
title_full_unstemmed Carcass traits of crossbred steers surgically castrated or immunocastrated.
title_sort Carcass traits of crossbred steers surgically castrated or immunocastrated.
author FAVERO, R.
author_facet FAVERO, R.
FEIJO, G. L. D.
BONIN, M. N.
GOMES, R. da C.
MENEZES, G. R. de O.
TORRES JUNIOR, R. A. de A.
SURITA, L. M. A.
MIZUBUTI, I. Y.
author_role author
author2 FEIJO, G. L. D.
BONIN, M. N.
GOMES, R. da C.
MENEZES, G. R. de O.
TORRES JUNIOR, R. A. de A.
SURITA, L. M. A.
MIZUBUTI, I. Y.
author2_role author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv RiICARDO FAVERO, UEL; GELSON LUIS DIAS FEIJO, CNPGC; MARINA N. BONIN, UFMS; RODRIGO DA COSTA GOMES, CNPGC; GILBERTO ROMEIRO DE OLIVEIRA MENEZE, CNPGC; ROBERTO AUGUSTO DE A TORRES JUNIOR, CNPGC; LUCY M. A. SURITA, UEL; IVONE Y. MIZUBUTI, UEL.
dc.contributor.author.fl_str_mv FAVERO, R.
FEIJO, G. L. D.
BONIN, M. N.
GOMES, R. da C.
MENEZES, G. R. de O.
TORRES JUNIOR, R. A. de A.
SURITA, L. M. A.
MIZUBUTI, I. Y.
dc.subject.por.fl_str_mv Musculature
Temporary castration
Gordura de touro
Gordura intramuscular
Castração temporária
Backfa
Musculo
Intramuscular fat
topic Musculature
Temporary castration
Gordura de touro
Gordura intramuscular
Castração temporária
Backfa
Musculo
Intramuscular fat
description The aim of this study was to evaluate carcass traits of crossbred steers surgically castrated or immunocastrated. Steers produced along two years from mating Nellore, 1/2 Nellore x 1/2 Angus and 1/2 Nellore x 1/2 Caracu dams with Braford, Charbray and Caracu sires were raised grazing tropical grasses until 20 months of age (n = 80; 40 per treatment; five of each genetic group per treatment), finished feedlot for 4 months (n = 64; 32 per treatment; four of each genetic group per treatment), and harvested at 570 ? 63 kg of body weight. The immunocastration protocol was performed in three applications of vaccine Bopriva (Zoetis; 1 ml subcutaneous each application), targeting the complete castration effect, obtained in the 2nd dose, at 14 months of age, when was also performed surgical castration of the other steers, so that all animals were castrated at the same age. Ultrasound scanning was performed at the beginning and end of the growing period to determine ribeye area (REAi / REAf), backfat thickness (BFTi / BFTf) and rump fat thickness (RFTi / RFTf). Hot carcass weight (HCW) and carcass dressing (CD) were measured at slaughter. Following 24-h chill, Longissimus marbling score (12th-13th ribs section), carcass backfat score (BFS), REAsl and BFTsl were evaluated. Longissimus samples were analyzed for Warner Bratzler shear force (SF) following 0d and 7d aging as well as Hunter L*, a* and b* values following 7d aging. Data were analyzed under a mixed model with sire and dam genetic group (and its iteration), birth season, castration method and backgrounding paddock as fixed effects, and sire nested in sire genetic group as random effect. There were no differences on BFTi, RFTi and RFTf (P > 0.05), however, there was tendency (P < 0.10) that BFTf was higher for immunocastrated steers (3.3 vs 2.8 mm). HCW, CD, BFTsl and BFS were similar (P > 0.05) among animals. The REAsl was superior for immunocastrated steers (81.8 vs. 76.5 cm2; P < 0.05). Marbling score was higher for surgically castrated (626 vs. 582; P < 0.05) and no significant differences for SF and Hunter color values were observed among steers (P > 0.05). Immunocastration can be used as alternative for surgical castration to improve backfat thickness, however it can negatively affect marbling in crossbred steers. - See more at: https://proceedings.galoa.com.br/imas/papers/carcass-traits-of-crossbred-steers-surgically-castrated-or-immunocastrated#sthash.wVsCYEpG.dpuf
publishDate 2016
dc.date.none.fl_str_mv 2016-11-03T11:11:11Z
2016-11-03T11:11:11Z
2016-11-03
2016
2017-03-07T11:11:11Z
dc.type.driver.fl_str_mv Resumo em anais e proceedings
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
status_str publishedVersion
dc.identifier.uri.fl_str_mv International Meeting of Advances in Animal Science, 2016., Jaboticabal. Anais... Jaboticabal: UNESP, 2016.
http://www.alice.cnptia.embrapa.br/alice/handle/doc/1055834
identifier_str_mv International Meeting of Advances in Animal Science, 2016., Jaboticabal. Anais... Jaboticabal: UNESP, 2016.
url http://www.alice.cnptia.embrapa.br/alice/handle/doc/1055834
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.source.none.fl_str_mv reponame:Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)
instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
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instname_str Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
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institution EMBRAPA
reponame_str Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)
collection Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)
repository.name.fl_str_mv Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
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