Libido and serving skills of Zebu cattle bulls

Detalhes bibliográficos
Autor(a) principal: Menegassi, Silvio Renato Oliveira
Data de Publicação: 2021
Outros Autores: Peripolli, Vanessa, Canozzi, Maria Eugênia Andrighetto, Barcellos, Júlio Otávio Jardim
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Semina. Ciências Agrárias (Online)
Texto Completo: https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/41993
Resumo: The goal of this study was to evaluate the rejection rates of Zebu bulls during behavioral assessment (libido and serving ability) and the importance of this step in bull breeding soundness evaluation (BBSE). A total of 1,534 bulls reared in the state of Rio Grande do Sul, Brazil, of Nelore (1,340), Brahman (76), Guzerá (98), and Tabapuã (210) breeds were evaluated. The evaluation consisted of four steps. Step I was the general physical examination, Step II genital tract examination, Step III semen evaluation, and Step IV behavioral assessment of libido and the ability to complete copulation. To evaluate the relationship between the binary variables of approved or rejected during different steps of the BBSE, and age groups (young and mature bulls), chi-square tests and logistic regression were used. The general rejection rates in the BBSE were 5.64% and 15.20% for young and mature Zebu bulls, respectively. ¬Problems with the sexual behavior (libido and/or serving ability) of bulls accounted for the rejection of 0.46% and 2.29% of young and mature Zebu bulls, respectively. The lack of libido and serving ability was shown to be an important problem concerning the total number of possible causes of Zebu bull rejection during the BBSE. This result suggests that the behavioral step should be performed regularly, rather than being complementary to the standard BBSE in Zebu cattle.
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spelling Libido and serving skills of Zebu cattle bullsLibido e habilidade física em touros zebuínosAndrologicalBehavioral assessmentBos taurus indicusFailure rates.AndrológicoAvaliação comportamentalBos taurus indicusTaxas de falha.The goal of this study was to evaluate the rejection rates of Zebu bulls during behavioral assessment (libido and serving ability) and the importance of this step in bull breeding soundness evaluation (BBSE). A total of 1,534 bulls reared in the state of Rio Grande do Sul, Brazil, of Nelore (1,340), Brahman (76), Guzerá (98), and Tabapuã (210) breeds were evaluated. The evaluation consisted of four steps. Step I was the general physical examination, Step II genital tract examination, Step III semen evaluation, and Step IV behavioral assessment of libido and the ability to complete copulation. To evaluate the relationship between the binary variables of approved or rejected during different steps of the BBSE, and age groups (young and mature bulls), chi-square tests and logistic regression were used. The general rejection rates in the BBSE were 5.64% and 15.20% for young and mature Zebu bulls, respectively. ¬Problems with the sexual behavior (libido and/or serving ability) of bulls accounted for the rejection of 0.46% and 2.29% of young and mature Zebu bulls, respectively. The lack of libido and serving ability was shown to be an important problem concerning the total number of possible causes of Zebu bull rejection during the BBSE. This result suggests that the behavioral step should be performed regularly, rather than being complementary to the standard BBSE in Zebu cattle.O objetivo deste estudo foi avaliar as taxas de reprovação de touros zebuínos durante a avaliação comportamental (libido e habilidade física) e a importância desta etapa no Exame Andrológico em Touros (EAT). Foram avaliados 1.534 touros, criados no estado do Rio Grande do Sul, Brasil, das raças Nelore (1.340), Brahman (76), Guzerá (98) e Tabapuã (210). A avaliação constou de quatro etapas. Etapa I foi o exame físico geral, Etapa II o exame do trato genital, Etapa III a avaliação do sêmen, e a Etapa IV a avaliação comportamental de libido e habilidade física para completar a cópula. Para avaliar a relação entre a variável binária aprovado ou reprovado durante as diferentes etapas do exame andrológico e as faixas etárias (touros jovens e adultos), foram utilizados os testes de qui-quadrado e de regressão logística. As taxas gerais de reprovação no EAT foram de 5,64% e 15,20% para os touros Zebu jovens e adultos, respectivamente. Problemas no comportamento sexual (libido e/ou habilidade física) dos touros foram responsáveis pela reprovação de 0,46% e 2,29% dos touros zebuínos jovens e adultos, respectivamente. A falta de libido e de habilidade física mostrou-se um problema importante em relação ao número total de possíveis causas de reprovação de touros zebuínos no EAT. Esse resultado sugere que a etapa comportamental deve ser realizada regularmente, ao invés de ser apenas complementar ao EAT padrão em bovinos zebuínos.UEL2021-07-02info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionBull Breeding Soundness EvaluationAvaliado por paresapplication/pdfhttps://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/4199310.5433/1679-0359.2021v42n5p3057Semina: Ciências Agrárias; Vol. 42 No. 5 (2021); 3057-3064Semina: Ciências Agrárias; v. 42 n. 5 (2021); 3057-30641679-03591676-546Xreponame:Semina. Ciências Agrárias (Online)instname:Universidade Estadual de Londrina (UEL)instacron:UELenghttps://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/41993/30691Copyright (c) 2021 Semina: Ciências Agráriashttp://creativecommons.org/licenses/by-nc/4.0info:eu-repo/semantics/openAccessMenegassi, Silvio Renato OliveiraPeripolli, VanessaCanozzi, Maria Eugênia AndrighettoBarcellos, Júlio Otávio Jardim2022-09-30T13:40:38Zoai:ojs.pkp.sfu.ca:article/41993Revistahttp://www.uel.br/revistas/uel/index.php/semagrariasPUBhttps://ojs.uel.br/revistas/uel/index.php/semagrarias/oaisemina.agrarias@uel.br1679-03591676-546Xopendoar:2022-09-30T13:40:38Semina. Ciências Agrárias (Online) - Universidade Estadual de Londrina (UEL)false
dc.title.none.fl_str_mv Libido and serving skills of Zebu cattle bulls
Libido e habilidade física em touros zebuínos
title Libido and serving skills of Zebu cattle bulls
spellingShingle Libido and serving skills of Zebu cattle bulls
Menegassi, Silvio Renato Oliveira
Andrological
Behavioral assessment
Bos taurus indicus
Failure rates.
Andrológico
Avaliação comportamental
Bos taurus indicus
Taxas de falha.
title_short Libido and serving skills of Zebu cattle bulls
title_full Libido and serving skills of Zebu cattle bulls
title_fullStr Libido and serving skills of Zebu cattle bulls
title_full_unstemmed Libido and serving skills of Zebu cattle bulls
title_sort Libido and serving skills of Zebu cattle bulls
author Menegassi, Silvio Renato Oliveira
author_facet Menegassi, Silvio Renato Oliveira
Peripolli, Vanessa
Canozzi, Maria Eugênia Andrighetto
Barcellos, Júlio Otávio Jardim
author_role author
author2 Peripolli, Vanessa
Canozzi, Maria Eugênia Andrighetto
Barcellos, Júlio Otávio Jardim
author2_role author
author
author
dc.contributor.author.fl_str_mv Menegassi, Silvio Renato Oliveira
Peripolli, Vanessa
Canozzi, Maria Eugênia Andrighetto
Barcellos, Júlio Otávio Jardim
dc.subject.por.fl_str_mv Andrological
Behavioral assessment
Bos taurus indicus
Failure rates.
Andrológico
Avaliação comportamental
Bos taurus indicus
Taxas de falha.
topic Andrological
Behavioral assessment
Bos taurus indicus
Failure rates.
Andrológico
Avaliação comportamental
Bos taurus indicus
Taxas de falha.
description The goal of this study was to evaluate the rejection rates of Zebu bulls during behavioral assessment (libido and serving ability) and the importance of this step in bull breeding soundness evaluation (BBSE). A total of 1,534 bulls reared in the state of Rio Grande do Sul, Brazil, of Nelore (1,340), Brahman (76), Guzerá (98), and Tabapuã (210) breeds were evaluated. The evaluation consisted of four steps. Step I was the general physical examination, Step II genital tract examination, Step III semen evaluation, and Step IV behavioral assessment of libido and the ability to complete copulation. To evaluate the relationship between the binary variables of approved or rejected during different steps of the BBSE, and age groups (young and mature bulls), chi-square tests and logistic regression were used. The general rejection rates in the BBSE were 5.64% and 15.20% for young and mature Zebu bulls, respectively. ¬Problems with the sexual behavior (libido and/or serving ability) of bulls accounted for the rejection of 0.46% and 2.29% of young and mature Zebu bulls, respectively. The lack of libido and serving ability was shown to be an important problem concerning the total number of possible causes of Zebu bull rejection during the BBSE. This result suggests that the behavioral step should be performed regularly, rather than being complementary to the standard BBSE in Zebu cattle.
publishDate 2021
dc.date.none.fl_str_mv 2021-07-02
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Bull Breeding Soundness Evaluation
Avaliado por pares
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/41993
10.5433/1679-0359.2021v42n5p3057
url https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/41993
identifier_str_mv 10.5433/1679-0359.2021v42n5p3057
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/41993/30691
dc.rights.driver.fl_str_mv Copyright (c) 2021 Semina: Ciências Agrárias
http://creativecommons.org/licenses/by-nc/4.0
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Copyright (c) 2021 Semina: Ciências Agrárias
http://creativecommons.org/licenses/by-nc/4.0
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv UEL
publisher.none.fl_str_mv UEL
dc.source.none.fl_str_mv Semina: Ciências Agrárias; Vol. 42 No. 5 (2021); 3057-3064
Semina: Ciências Agrárias; v. 42 n. 5 (2021); 3057-3064
1679-0359
1676-546X
reponame:Semina. Ciências Agrárias (Online)
instname:Universidade Estadual de Londrina (UEL)
instacron:UEL
instname_str Universidade Estadual de Londrina (UEL)
instacron_str UEL
institution UEL
reponame_str Semina. Ciências Agrárias (Online)
collection Semina. Ciências Agrárias (Online)
repository.name.fl_str_mv Semina. Ciências Agrárias (Online) - Universidade Estadual de Londrina (UEL)
repository.mail.fl_str_mv semina.agrarias@uel.br
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