Development and reproductive performance of Hereford heifers of different frame sizes up to mating at 14-15 months of age
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 UFRGS |
Texto Completo: | http://hdl.handle.net/10183/185127 |
Resumo: | Body development and reproductive performance of a hundred forty-two 14 to 15-month-old heifers, classified at weaning according to frame size as small, medium, and large, were evaluated. The parameters evaluated were: body weight, hip height, body condition score, weight gain, ovarian activity, and pregnancy rate. At weaning, body weight and hip height were significantly different among frame scores, (small – 133.0 kg, 92.2 cm; medium – 158.5 kg, 96.6 cm; and large – 185.2 kg; 100.2 cm). After weaning, heifers grazed together on natural pastures during the autumn and on ryegrass (Lolium multiflorum La.) during the winter and spring. Frame score differences remained until the beginning of the breeding season (BS), starting on average at 14 months of age. Weight gain between weaning and the beginning of BS was not different among frame scores (0.740 kg/day, on average). Body weights at the beginning of the BS were significantly different, of 255.7 kg (53.3% of the mature weight) for small heifers, 285.0 kg (59.4%) for medium heifers, and 307.6 kg (64.1%) for large heifers. Ovarian activity at the beginning of the BS was not different among the three groups. The average weight gain values during the BS of 0.492, 0.472, and 0.421 kg/day for small, medium, and large heifers, respectively, were significantly different. Pregnancy rates were not different among groups (small, 71.4%; medium, 76.4%; and large, 76.5%). Frame score did not influence the reproductive performance of heifers, but the small and medium heifers conceived 29 and 20 days earlier, respectively, than the large heifers. |
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Silva, Mauricio Dallmann daLobato, Jose Fernando PivaVaz, Ricardo ZambardaEloy, Lidiane RaquelVaz, Marcia Bitencourt2018-11-28T02:45:17Z20181516-3598http://hdl.handle.net/10183/185127001079267Body development and reproductive performance of a hundred forty-two 14 to 15-month-old heifers, classified at weaning according to frame size as small, medium, and large, were evaluated. The parameters evaluated were: body weight, hip height, body condition score, weight gain, ovarian activity, and pregnancy rate. At weaning, body weight and hip height were significantly different among frame scores, (small – 133.0 kg, 92.2 cm; medium – 158.5 kg, 96.6 cm; and large – 185.2 kg; 100.2 cm). After weaning, heifers grazed together on natural pastures during the autumn and on ryegrass (Lolium multiflorum La.) during the winter and spring. Frame score differences remained until the beginning of the breeding season (BS), starting on average at 14 months of age. Weight gain between weaning and the beginning of BS was not different among frame scores (0.740 kg/day, on average). Body weights at the beginning of the BS were significantly different, of 255.7 kg (53.3% of the mature weight) for small heifers, 285.0 kg (59.4%) for medium heifers, and 307.6 kg (64.1%) for large heifers. Ovarian activity at the beginning of the BS was not different among the three groups. The average weight gain values during the BS of 0.492, 0.472, and 0.421 kg/day for small, medium, and large heifers, respectively, were significantly different. Pregnancy rates were not different among groups (small, 71.4%; medium, 76.4%; and large, 76.5%). Frame score did not influence the reproductive performance of heifers, but the small and medium heifers conceived 29 and 20 days earlier, respectively, than the large heifers.application/pdfengRevista brasileira de zootecnia. Viçosa, MG. Vol. 47 (2018), [art.] e20170031, 9 p.PerformanceReprodução animalPrenhezAge at conceptionAverage daily gainBody condition scoreHip heightOvarian activityPregnancy rateDevelopment and reproductive performance of Hereford heifers of different frame sizes up to mating at 14-15 months of ageinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/otherinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSTEXT001079267.pdf.txt001079267.pdf.txtExtracted Texttext/plain49118http://www.lume.ufrgs.br/bitstream/10183/185127/2/001079267.pdf.txte18f406ee888fbcef3790266db533193MD52ORIGINAL001079267.pdfTexto completo (inglês)application/pdf522085http://www.lume.ufrgs.br/bitstream/10183/185127/1/001079267.pdfbf3f50a5b932e756e52af0536c9ff951MD5110183/1851272018-11-29 02:46:12.431516oai:www.lume.ufrgs.br:10183/185127Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2018-11-29T04:46:12Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Development and reproductive performance of Hereford heifers of different frame sizes up to mating at 14-15 months of age |
title |
Development and reproductive performance of Hereford heifers of different frame sizes up to mating at 14-15 months of age |
spellingShingle |
Development and reproductive performance of Hereford heifers of different frame sizes up to mating at 14-15 months of age Silva, Mauricio Dallmann da Performance Reprodução animal Prenhez Age at conception Average daily gain Body condition score Hip height Ovarian activity Pregnancy rate |
title_short |
Development and reproductive performance of Hereford heifers of different frame sizes up to mating at 14-15 months of age |
title_full |
Development and reproductive performance of Hereford heifers of different frame sizes up to mating at 14-15 months of age |
title_fullStr |
Development and reproductive performance of Hereford heifers of different frame sizes up to mating at 14-15 months of age |
title_full_unstemmed |
Development and reproductive performance of Hereford heifers of different frame sizes up to mating at 14-15 months of age |
title_sort |
Development and reproductive performance of Hereford heifers of different frame sizes up to mating at 14-15 months of age |
author |
Silva, Mauricio Dallmann da |
author_facet |
Silva, Mauricio Dallmann da Lobato, Jose Fernando Piva Vaz, Ricardo Zambarda Eloy, Lidiane Raquel Vaz, Marcia Bitencourt |
author_role |
author |
author2 |
Lobato, Jose Fernando Piva Vaz, Ricardo Zambarda Eloy, Lidiane Raquel Vaz, Marcia Bitencourt |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Silva, Mauricio Dallmann da Lobato, Jose Fernando Piva Vaz, Ricardo Zambarda Eloy, Lidiane Raquel Vaz, Marcia Bitencourt |
dc.subject.por.fl_str_mv |
Performance Reprodução animal Prenhez |
topic |
Performance Reprodução animal Prenhez Age at conception Average daily gain Body condition score Hip height Ovarian activity Pregnancy rate |
dc.subject.eng.fl_str_mv |
Age at conception Average daily gain Body condition score Hip height Ovarian activity Pregnancy rate |
description |
Body development and reproductive performance of a hundred forty-two 14 to 15-month-old heifers, classified at weaning according to frame size as small, medium, and large, were evaluated. The parameters evaluated were: body weight, hip height, body condition score, weight gain, ovarian activity, and pregnancy rate. At weaning, body weight and hip height were significantly different among frame scores, (small – 133.0 kg, 92.2 cm; medium – 158.5 kg, 96.6 cm; and large – 185.2 kg; 100.2 cm). After weaning, heifers grazed together on natural pastures during the autumn and on ryegrass (Lolium multiflorum La.) during the winter and spring. Frame score differences remained until the beginning of the breeding season (BS), starting on average at 14 months of age. Weight gain between weaning and the beginning of BS was not different among frame scores (0.740 kg/day, on average). Body weights at the beginning of the BS were significantly different, of 255.7 kg (53.3% of the mature weight) for small heifers, 285.0 kg (59.4%) for medium heifers, and 307.6 kg (64.1%) for large heifers. Ovarian activity at the beginning of the BS was not different among the three groups. The average weight gain values during the BS of 0.492, 0.472, and 0.421 kg/day for small, medium, and large heifers, respectively, were significantly different. Pregnancy rates were not different among groups (small, 71.4%; medium, 76.4%; and large, 76.5%). Frame score did not influence the reproductive performance of heifers, but the small and medium heifers conceived 29 and 20 days earlier, respectively, than the large heifers. |
publishDate |
2018 |
dc.date.accessioned.fl_str_mv |
2018-11-28T02:45:17Z |
dc.date.issued.fl_str_mv |
2018 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/other |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10183/185127 |
dc.identifier.issn.pt_BR.fl_str_mv |
1516-3598 |
dc.identifier.nrb.pt_BR.fl_str_mv |
001079267 |
identifier_str_mv |
1516-3598 001079267 |
url |
http://hdl.handle.net/10183/185127 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Revista brasileira de zootecnia. Viçosa, MG. Vol. 47 (2018), [art.] e20170031, 9 p. |
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info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
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application/pdf |
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