Evaluation of sexual maturity of young bulls from different breeds selected for post-weaning weight
Sperm traits of 243 young bulls from Caracu (n=62), Gir (n=23), Guzerá (n=59) and Nellore (n=99) breeds, with 20-25 months of age, from the Breeding Program of Estação Experimental de Zootecnia de Sertãozinho, were analyzed. On the day of breeding soundness evaluation animals were weighed, the scrot...
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| Format: | Article |
| Language: | English |
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Instituto de Zootecnia
2011-01-01
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| Series: | Boletim de Indústria Animal |
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| Online Access: | http://revistas.bvs-vet.org.br/bia/article/view/24263 |
| _version_ | 1818598364041707520 |
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| author | Fabio Morato Monteiro Letícia Zoccolaro Oliveira Clara Slade Oliveira Tatiane Almeida Drummond Tetzner Maria eugênia zerlottu Mercadante Renata Helena Branco Joaquim Mansano Garcia |
| author_facet | Fabio Morato Monteiro Letícia Zoccolaro Oliveira Clara Slade Oliveira Tatiane Almeida Drummond Tetzner Maria eugênia zerlottu Mercadante Renata Helena Branco Joaquim Mansano Garcia |
| author_sort | Fabio Morato Monteiro |
| collection | DOAJ |
| description | Sperm traits of 243 young bulls from Caracu (n=62), Gir (n=23), Guzerá (n=59) and Nellore (n=99) breeds, with 20-25 months of age, from the Breeding Program of Estação Experimental de Zootecnia de Sertãozinho, were analyzed. On the day of breeding soundness evaluation animals were weighed, the scrotal circumference was measured and the semen was collected by electroejaculation. The sperm motility, vigor and morphology were assessed and the animals were classified according to the andrological classification by points (CAP). No difference was observed among breeds for any seminal trait evaluated, although Nelore presented lower scrotal circumference average than the other breeds. When the animals were classified by body weight, it was observed that the heavier animals presented greater scrotal circumference, better seminal characteristics and, consequently, greater percentage of these animals were considered sexually mature comparing with the other body weight groups. It was concluded that the animals selected for post-weaning and reared on pasture from the taurine adapted breed Caracu and from the zebu breeds Gir, Guzerá and Nelore have proved able to reproduction at 23.2, 23.4, 22.7 and 22.8 months, respectively, corresponding to age which reached an average weight of 452, 422, 470 and 467 kg respectively. |
| first_indexed | 2024-12-16T12:02:31Z |
| format | Article |
| id | doaj.art-8eb42b9ed8dd410cb79e5b0feab79df1 |
| institution | Directory Open Access Journal |
| issn | 0067-9615 1981-4100 |
| language | English |
| last_indexed | 2024-12-16T12:02:31Z |
| publishDate | 2011-01-01 |
| publisher | Instituto de Zootecnia |
| record_format | Article |
| series | Boletim de Indústria Animal |
| spelling | doaj.art-8eb42b9ed8dd410cb79e5b0feab79df12022-12-21T22:32:25ZengInstituto de ZootecniaBoletim de Indústria Animal0067-96151981-41002011-01-01681374323377Evaluation of sexual maturity of young bulls from different breeds selected for post-weaning weightFabio Morato Monteiro0Letícia Zoccolaro Oliveira1Clara Slade Oliveira2Tatiane Almeida Drummond Tetzner3Maria eugênia zerlottu Mercadante4Renata Helena Branco5Joaquim Mansano Garcia6Secretaria de Agricultura e Abastecimento do Estado de São Paulo, Agência Paulista de Tecnologia dos Agronegócios, Instituto de Zootecnia, Centro de Apoio a Pesquisa Tecnológica dos Agronegócios de Bovinos de Corte, Sertãozinho, SPUniversidade Estadual Paulista Júlio de Mesquita Filho, Faculdade de Ciências Agrárias e Veterinária, Departamento de Medicina Veterinária Preventiva e Reprodução Animal, Jaboticabal, SPUniversidade Estadual Paulista Júlio de Mesquita Filho, Faculdade de Ciências Agrárias e Veterinária, Departamento de Medicina Veterinária Preventiva e Reprodução Animal, Jaboticabal, SPUniversidade Estadual Paulista Júlio de Mesquita Filho, Faculdade de Ciências Agrárias e Veterinária, Departamento de Medicina Veterinária Preventiva e Reprodução Animal, Jaboticabal, SPSecretaria de Agricultura e Abastecimento do Estado de São Paulo, Agência Paulista de Tecnologia dos Agronegócios, Instituto de Zootecnia, Centro de Apoio a Pesquisa Tecnológica dos Agronegócios de Bovinos de Corte, Sertãozinho, SPSecretaria de Agricultura e Abastecimento do Estado de São Paulo, Agência Paulista de Tecnologia dos Agronegócios, Instituto de Zootecnia, Centro de Apoio a Pesquisa Tecnológica dos Agronegócios de Bovinos de Corte, Sertãozinho, SPSecretaria de Agricultura e Abastecimento do Estado de São Paulo, Agência Paulista de Tecnologia dos Agronegócios, Instituto de Zootecnia, Centro de Apoio a Pesquisa Tecnológica dos Agronegócios de Bovinos de Corte, Sertãozinho, SPSperm traits of 243 young bulls from Caracu (n=62), Gir (n=23), Guzerá (n=59) and Nellore (n=99) breeds, with 20-25 months of age, from the Breeding Program of Estação Experimental de Zootecnia de Sertãozinho, were analyzed. On the day of breeding soundness evaluation animals were weighed, the scrotal circumference was measured and the semen was collected by electroejaculation. The sperm motility, vigor and morphology were assessed and the animals were classified according to the andrological classification by points (CAP). No difference was observed among breeds for any seminal trait evaluated, although Nelore presented lower scrotal circumference average than the other breeds. When the animals were classified by body weight, it was observed that the heavier animals presented greater scrotal circumference, better seminal characteristics and, consequently, greater percentage of these animals were considered sexually mature comparing with the other body weight groups. It was concluded that the animals selected for post-weaning and reared on pasture from the taurine adapted breed Caracu and from the zebu breeds Gir, Guzerá and Nelore have proved able to reproduction at 23.2, 23.4, 22.7 and 22.8 months, respectively, corresponding to age which reached an average weight of 452, 422, 470 and 467 kg respectively.http://revistas.bvs-vet.org.br/bia/article/view/24263Bos indicusBos taurusmaturidade sexualpeso corporal |
| spellingShingle | Fabio Morato Monteiro Letícia Zoccolaro Oliveira Clara Slade Oliveira Tatiane Almeida Drummond Tetzner Maria eugênia zerlottu Mercadante Renata Helena Branco Joaquim Mansano Garcia Evaluation of sexual maturity of young bulls from different breeds selected for post-weaning weight Boletim de Indústria Animal Bos indicus Bos taurus maturidade sexual peso corporal |
| title | Evaluation of sexual maturity of young bulls from different breeds selected for post-weaning weight |
| title_full | Evaluation of sexual maturity of young bulls from different breeds selected for post-weaning weight |
| title_fullStr | Evaluation of sexual maturity of young bulls from different breeds selected for post-weaning weight |
| title_full_unstemmed | Evaluation of sexual maturity of young bulls from different breeds selected for post-weaning weight |
| title_short | Evaluation of sexual maturity of young bulls from different breeds selected for post-weaning weight |
| title_sort | evaluation of sexual maturity of young bulls from different breeds selected for post weaning weight |
| topic | Bos indicus Bos taurus maturidade sexual peso corporal |
| url | http://revistas.bvs-vet.org.br/bia/article/view/24263 |
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