Influence of animal temperament on body and reproductive development of beef bulls

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade de São Paulo (USP)-
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorInstitute of Animal Science of São José do Rio Preto-
Autor(es): dc.contributorSão Paulo-
Autor(es): dc.contributorCentral Bela Vista (CRV® Group)-
Autor(es): dc.creatorda Silva, Mariana Karla Francolino-
Autor(es): dc.creatorNichi, Marcilio-
Autor(es): dc.creatorBorges, Marcelo Sant'Ana-
Autor(es): dc.creatorLandgraf, Richardt Gama-
Autor(es): dc.creatorPereira, Marcelo Francisco Arantes-
Autor(es): dc.creatorCrespilho, André Maciel-
Data de aceite: dc.date.accessioned2025-08-21T19:05:34Z-
Data de disponibilização: dc.date.available2025-08-21T19:05:34Z-
Data de envio: dc.date.issued2025-04-29-
Data de envio: dc.date.issued2025-03-01-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1016/j.anireprosci.2025.107788-
Fonte completa do material: dc.identifierhttps://hdl.handle.net/11449/297059-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/297059-
Descrição: dc.descriptionSeveral studies have related reactive temperament to poorer productive and reproductive performance in cattle. However, no studies have aimed to investigate the effect of temperament on sexual development and precocity of male cattle. The objective of this study was to test the hypothesis that reactive animals exhibit delayed sexual development and poorer reproductive performance. For the study, 40 crossbred male cattle (Nellore x Santa Gertrudis) at 12 months were selected. The animals underwent behavioral evaluation and were divided into two groups: calm (CA; n = 24) and reactive (RE; n = 16). All steers were weighed to monitor weight gain, and blood samples were collected to measure cortisol and testosterone concentrations. Semen collections by electroejaculation were performed to determine the onset of puberty and assess sperm quality. Cryopreservation tests were conducted, and the samples were evaluated for kinetics and plasma membrane integrity. Ultrasound examinations assessed testicular development. Additionally, testicular biopsies were performed to evaluate spermatid and spermatozoa ratios. There was a trend toward higher cortisol production (P = 0.07) in RE animals. Higher total (P = 0.03), average (P = 0.07), and daily (P = 0.06) weight gains were observed for CA animals. RE steers produced a higher proportion of cells with minor sperm defects (P = 0.06). Greater vesicular glands development was observed in CA animals (P = 0.01). No effect of temperament was observed on sexual precocity, cryotolerance, or testosterone production. It was concluded that although temperament does not influence age at puberty, reactive bulls exhibit poorer performance in body development, vesicular glands development, and fresh semen quality compared to calm bulls.-
Descrição: dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)-
Descrição: dc.descriptionDepartment of Animal Reproduction São Paulo University (USP) São Paulo-
Descrição: dc.descriptionSão Paulo State University (UNESP) Faculty of Agricultural and Veterinarian Sciences, São Paulo-
Descrição: dc.descriptionDepartment of Pharmaceutical Sciences Federal University of São Paulo (UNIFESP), São Paulo-
Descrição: dc.descriptionInstitute of Animal Science of São José do Rio Preto, São Paulo-
Descrição: dc.descriptionSanto Amaro University (UNISA) São Paulo São Paulo-
Descrição: dc.descriptionCentral Bela Vista (CRV® Group), São Paulo-
Descrição: dc.descriptionSão Paulo State University (UNESP) Faculty of Agricultural and Veterinarian Sciences, São Paulo-
Descrição: dc.descriptionFAPESP: 2019/06456–2-
Idioma: dc.languageen-
Relação: dc.relationAnimal Reproduction Science-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectBehavior-
Palavras-chave: dc.subjectCortisol-
Palavras-chave: dc.subjectPuberty-
Palavras-chave: dc.subjectReactivity-
Palavras-chave: dc.subjectSemen-
Título: dc.titleInfluence of animal temperament on body and reproductive development of beef bulls-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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