| Revista: | Brazilian archives of biology and technology |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000365597 |
| ISSN: | 1516-8913 |
| Autors: | Frares, Luciana Ferri1 Weiss, Romildo Romualdo2 Kozicki, Luiz Ernandes3 Santangelo, Renata Prestes1 Abreu, Renata Azevedo de2 Santos, Ivo Walter do4 Dell'aqua-Junior, Jose Antonio5 Breda, Jose Carlos3 |
| Institucions: | 1Universidade Federal do Parana, Programa de Pos-graduacao em Ciencias Veterinarias, Curitiba, Parana. Brasil 2Universidade Federal do Parana, Programa de Pos Graduacao em Processos Biotecnologicos, Curitiba, Parana. Brasil 3Pontificia Universidade Catolica do Parana, Escola de Ciencias Agrarias e Medicina Veterinaria, Curitiba, Parana. Brasil 4Universidade Federal do Parana, Palotina, Parana. Brasil 5Universidade Estadual Paulista "Julio de Mesquita Filho", Departamento de Reproducao Animal, Botucatu, Sao Paulo. Brasil |
| Any: | 2013 |
| Període: | Jul-Ago |
| Volum: | 56 |
| Número: | 4 |
| Paginació: | 575-580 |
| País: | Brasil |
| Idioma: | Inglés |
| Tipo de documento: | Artículo |
| Enfoque: | Experimental, aplicado |
| Resumen en inglés | The aim of this work was to study estrus synchronization and fixed time artificial insemination (FTAI) in dairy buffaloes during season anestrus. One hundred thirty-nine dairy buffaloes in seasonal anestrus were divided in two groups as G1(n=66) and G2(n=73). The protocols for both the groups were the same until day (D)14:D0 administration of 2.0 mg estradiol benzoate and implantation of progesterone device (P4) for 14 days; D14 removal of P4 plus 150 mg of cloprostenol and 400 IU of equine chorionic gonadotropin. On D16, G1 received 10 mg of buserelin and G2 100 mg deslorelin acetate. On D17, both the groups were submitted to FTAI. Ultrasonographic examinations of ovaries were performed on D0, D14, D16 and D17. Results showed that pregnancy rates in G1 and G2 were 20 and 41% (p<0.05) and the ovulation rates were 16.6 and 37%, respectively (p<0.05). The dominant follicle (DF) diameter on D16 was 7.9 mm in G1 and 8.9 mm in G2 (p>0.05). Thirty-five percent of the animals in G1 and 54.1% in G2 showed a diameter DF greater than 8.0 mm on D16 (p>0.05). Thus, it could be concluded that the protocols synchronized the estrus, leading the concentration of the parturitions in the period of low milk production. Deslorelin was more efficient than buserelin due the higher percentage of DF ovulation and higher pregnancy rates |
| Disciplines | Medicina veterinaria y zootecnia |
| Paraules clau: | Bovinos, Reproducción y genética animal, Inseminación artificial, Sincronización del estro, Anestro estacional, Buserelina, Búfalos |
| Keyword: | Veterinary medicine and animal husbandry, Animal reproduction and genetics, Bovines, Artificial insemination, Estrous synchronization, Seasonal anoestrus, Buserelin, Buffaloes |
| Text complet: | Texto completo (Ver HTML) |
