Evaluation of reproductive performance of beef heifers mated at 14, 18 and 26 months of age

Detalhes bibliográficos
Autor(a) principal: Gottschall, Carlos Santos
Data de Publicação: 2007
Outros Autores: Ferreira, Eduardo Tonet, Canellas, Leonardo, Bittencourt, Hélio Radke
Tipo de documento: Artigo
Idioma: por
Título da fonte: Pesquisa Agropecuária Gaúcha (Online)
Texto Completo: http://revistapag.agricultura.rs.gov.br/ojs/index.php/revistapag/article/view/261
Resumo: The objective of this study was to evaluate the reproductive performance of heifers mated at 14, 18 and 26 months of age. The study was based on data collected from 2003 to 2005 from 270 heifers (Aberdeen Angus, Devon and cross-breeds) and mated at 14 (A14, n = 70), 18 (A18, n = 36) and 26 months old (A26, n = 164). The attributes analyzed among the different groups were age at mating (AM), average weight gain from birth to mating (AWG-BM), weight at mating (WM) and pregnancy rate (PR). The PR was tested using Qui-square test and the average weight gains and weight at mating were tested using the test t of Student. The WM was 312.0 kg for the A14 group, 333.0 kg for the A18 and 297.4 kg for the A26 group, where the A18 was different than A14 and A26 (P < 0.01). The AWG-BM was 0.658 kg, 0.507 kg and 0.353 kg for the A14, A18 and A26 groups, respectively, showing significance differences (P < 0.01). The PR was 84.3% for the A14 group, 94.4% for the A18 and 90.9% for the A26 animals group (P > 0.05). Thus, it is possible to conclude that the different ages at mating did not influence on the pregnancy rate.
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spelling Evaluation of reproductive performance of beef heifers mated at 14, 18 and 26 months of age Avaliação do desempenho reprodutivo de novilhas de corte acasaladas aos 14, 18 e 26 meses de idade beef heifers, pregnancy rate, puberty, weight at mating.novilhas de corte, peso ao acasalamento, puberdade, taxa de prenhez.The objective of this study was to evaluate the reproductive performance of heifers mated at 14, 18 and 26 months of age. The study was based on data collected from 2003 to 2005 from 270 heifers (Aberdeen Angus, Devon and cross-breeds) and mated at 14 (A14, n = 70), 18 (A18, n = 36) and 26 months old (A26, n = 164). The attributes analyzed among the different groups were age at mating (AM), average weight gain from birth to mating (AWG-BM), weight at mating (WM) and pregnancy rate (PR). The PR was tested using Qui-square test and the average weight gains and weight at mating were tested using the test t of Student. The WM was 312.0 kg for the A14 group, 333.0 kg for the A18 and 297.4 kg for the A26 group, where the A18 was different than A14 and A26 (P < 0.01). The AWG-BM was 0.658 kg, 0.507 kg and 0.353 kg for the A14, A18 and A26 groups, respectively, showing significance differences (P < 0.01). The PR was 84.3% for the A14 group, 94.4% for the A18 and 90.9% for the A26 animals group (P > 0.05). Thus, it is possible to conclude that the different ages at mating did not influence on the pregnancy rate. O trabalho teve por objetivo avaliar o desempenho reprodutivo de novilhas de corte acasaladas aos 14, 18 e 26 meses de idade. Foram coletados, durante os anos de 2003, 2004 e 2005, dados de 270 novilhas de corte de raças britânicas Aberdeen Angus, Devon e cruzas Angus x Devon x Nelore, acasaladas aos 14 (A14, n = 70), 18 (A18, n = 36) e 26 meses de idade (A26, n = 164). As características analisadas para os diferentes grupos foram peso ao início do acasalamento (PIA), ganho médio diário do nasci- mento ao acasalamento (GMD N-A) e taxa de prenhez (TP). A taxa de prenhez foi testada pelo Qui-quadrado, enquanto o peso ao início do acasalamento e o ganho médio diário entre os grupos foram avaliados pela análise de variância, teste-t. O PIA foi de 312,0 kg para o grupo A14, 333,0 kg para o grupo A18 e 297,4 kg para o grupo A26 , sendo que A18 diferiu de A14 e A26 (P < 0,01). O GMD N-A foi de 0,658 kg/dia, 0,507 kg/dia e 0,353 kg/dia para os grupos A14, A18 e A26, respectivamente, apresentan- do diferença estatística significativa entre os grupos (P < 0,01). A taxa de prenhez (TP) foi de 84,3 % para o grupo de novilhas do A14, 94,4% para as novilhas do A18 e 90,9% para o grupo de animais A26 (P > 0,05). Com estes resultados pode-se concluir que as diferentes idades ao acasalamento em que as novilhas foram submetidas não interferiram na taxa de prenhez. Departamento de Diagnóstico e Pesquisa Agropecuária. Secretaria de Agricultura, Pecuária e Desenvolvimento Rural2007-12-20info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://revistapag.agricultura.rs.gov.br/ojs/index.php/revistapag/article/view/261Pesquisa Agropecuária Gaúcha; Vol 13 No 1/2 (2007): PESQ. AGROP. GAÚCHA; 125-129Pesquisa Agropecuária Gaúcha; v. 13 n. 1/2 (2007): PESQ. AGROP. GAÚCHA; 125-1292595-76860104-9070reponame:Pesquisa Agropecuária Gaúcha (Online)instname:Secretaria de Agricultura, Pecuária e Desenvolvimento Rural do Rio Grande do Sulinstacron:SEAPDRporhttp://revistapag.agricultura.rs.gov.br/ojs/index.php/revistapag/article/view/261/227Gottschall, Carlos Santos Ferreira, Eduardo Tonet Canellas, Leonardo Bittencourt, Hélio Radke info:eu-repo/semantics/openAccess2024-04-22T12:36:26Zoai:ojs.revistapag.agricultura.rs.gov.br:article/261Revistahttp://revistapag.agricultura.rs.gov.br/ojs/index.php/revistapagPUBhttp://revistapag.agricultura.rs.gov.br/ojs/index.php/revistapag/oaipag@agricultura.rs.gov.br||2595-76860104-9070opendoar:2024-04-22T12:36:26Pesquisa Agropecuária Gaúcha (Online) - Secretaria de Agricultura, Pecuária e Desenvolvimento Rural do Rio Grande do Sulfalse
dc.title.none.fl_str_mv Evaluation of reproductive performance of beef heifers mated at 14, 18 and 26 months of age
Avaliação do desempenho reprodutivo de novilhas de corte acasaladas aos 14, 18 e 26 meses de idade
title Evaluation of reproductive performance of beef heifers mated at 14, 18 and 26 months of age
spellingShingle Evaluation of reproductive performance of beef heifers mated at 14, 18 and 26 months of age
Gottschall, Carlos Santos
beef heifers, pregnancy rate, puberty, weight at mating.
novilhas de corte, peso ao acasalamento, puberdade, taxa de prenhez.
title_short Evaluation of reproductive performance of beef heifers mated at 14, 18 and 26 months of age
title_full Evaluation of reproductive performance of beef heifers mated at 14, 18 and 26 months of age
title_fullStr Evaluation of reproductive performance of beef heifers mated at 14, 18 and 26 months of age
title_full_unstemmed Evaluation of reproductive performance of beef heifers mated at 14, 18 and 26 months of age
title_sort Evaluation of reproductive performance of beef heifers mated at 14, 18 and 26 months of age
author Gottschall, Carlos Santos
author_facet Gottschall, Carlos Santos
Ferreira, Eduardo Tonet
Canellas, Leonardo
Bittencourt, Hélio Radke
author_role author
author2 Ferreira, Eduardo Tonet
Canellas, Leonardo
Bittencourt, Hélio Radke
author2_role author
author
author
dc.contributor.author.fl_str_mv Gottschall, Carlos Santos
Ferreira, Eduardo Tonet
Canellas, Leonardo
Bittencourt, Hélio Radke
dc.subject.por.fl_str_mv beef heifers, pregnancy rate, puberty, weight at mating.
novilhas de corte, peso ao acasalamento, puberdade, taxa de prenhez.
topic beef heifers, pregnancy rate, puberty, weight at mating.
novilhas de corte, peso ao acasalamento, puberdade, taxa de prenhez.
description The objective of this study was to evaluate the reproductive performance of heifers mated at 14, 18 and 26 months of age. The study was based on data collected from 2003 to 2005 from 270 heifers (Aberdeen Angus, Devon and cross-breeds) and mated at 14 (A14, n = 70), 18 (A18, n = 36) and 26 months old (A26, n = 164). The attributes analyzed among the different groups were age at mating (AM), average weight gain from birth to mating (AWG-BM), weight at mating (WM) and pregnancy rate (PR). The PR was tested using Qui-square test and the average weight gains and weight at mating were tested using the test t of Student. The WM was 312.0 kg for the A14 group, 333.0 kg for the A18 and 297.4 kg for the A26 group, where the A18 was different than A14 and A26 (P < 0.01). The AWG-BM was 0.658 kg, 0.507 kg and 0.353 kg for the A14, A18 and A26 groups, respectively, showing significance differences (P < 0.01). The PR was 84.3% for the A14 group, 94.4% for the A18 and 90.9% for the A26 animals group (P > 0.05). Thus, it is possible to conclude that the different ages at mating did not influence on the pregnancy rate.
publishDate 2007
dc.date.none.fl_str_mv 2007-12-20
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://revistapag.agricultura.rs.gov.br/ojs/index.php/revistapag/article/view/261
url http://revistapag.agricultura.rs.gov.br/ojs/index.php/revistapag/article/view/261
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv http://revistapag.agricultura.rs.gov.br/ojs/index.php/revistapag/article/view/261/227
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Departamento de Diagnóstico e Pesquisa Agropecuária. Secretaria de Agricultura, Pecuária e Desenvolvimento Rural
publisher.none.fl_str_mv Departamento de Diagnóstico e Pesquisa Agropecuária. Secretaria de Agricultura, Pecuária e Desenvolvimento Rural
dc.source.none.fl_str_mv Pesquisa Agropecuária Gaúcha; Vol 13 No 1/2 (2007): PESQ. AGROP. GAÚCHA; 125-129
Pesquisa Agropecuária Gaúcha; v. 13 n. 1/2 (2007): PESQ. AGROP. GAÚCHA; 125-129
2595-7686
0104-9070
reponame:Pesquisa Agropecuária Gaúcha (Online)
instname:Secretaria de Agricultura, Pecuária e Desenvolvimento Rural do Rio Grande do Sul
instacron:SEAPDR
instname_str Secretaria de Agricultura, Pecuária e Desenvolvimento Rural do Rio Grande do Sul
instacron_str SEAPDR
institution SEAPDR
reponame_str Pesquisa Agropecuária Gaúcha (Online)
collection Pesquisa Agropecuária Gaúcha (Online)
repository.name.fl_str_mv Pesquisa Agropecuária Gaúcha (Online) - Secretaria de Agricultura, Pecuária e Desenvolvimento Rural do Rio Grande do Sul
repository.mail.fl_str_mv pag@agricultura.rs.gov.br||
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