Cycle synchronization of rabbit does naturally mated or artificially inseminated

• Autores: E. Armero, Fernando García Ximénez, José Salvador Vicente Antón, Manuel Baselga Izquierdo
• Localización: World Rabbit Science, ISSN-e 1989-8886, ISSN 1257-5011, Vol. 2, Nº. 3, 1994, págs. 107-113
• Idioma: inglés
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• Resumen

  • Effects of Gonadorelin and PMSG on a cycle synchronization of 42 days were evaluated. Three hundred and seventy five does were used in two experiments.In the first, does were split in two groups, a group of 120 does received 25 IU PMSG 48 hours befare mating and a Gonadorelin i.m. injection (20 µg) just after mating. The other 120 does group received only the same dose of Gonadorelin i.m.  just after mating. In the second experiment ali does were injected with 25 IU of PMSG 48 hours befare mating (65 does) or artificial insemination (70 does). Pregnancy was checked 12 days later in both experiments and non pregnant does were treated with 200 µg of PGF2a. and mated or A.I. Mating acceptance rate was higher in does treated with 25 IU of PMSG than in non treated does (98.1 % vs 87.2 % ; P<0.001). This positive effect was supported along the experiment (at least eight months or tour cycles). Significant differences were observed in fertility rate between PMSG treated group and non treated in unfavourable season (92.0 % vs 79.4 % ; P<0.05). No significant effect was observed in litter size between these groups. In the second experiment, fertility rate of does artificially inseminated was lower than naturally mated (80.5 % vs 64.3 % ; P<0.05).