Libido and serving skills of Zebu cattle bulls
Autor(a) principal: | |
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Data de Publicação: | 2021 |
Outros Autores: | , , |
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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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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1799306084756750336 |