Note concerning the effect of PMSG stimulation on the mortality rate at birth and the distribution of litter size in artificially inseminated does

• Autores: L. Maertens, F. Luzi
• Localización: World Rabbit Science, ISSN-e 1989-8886, ISSN 1257-5011, Vol. 3, Nº. 2, 1995, págs. 57-61
• Idioma: inglés
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• Resumen

  • A study of the mortality rate at birth and the distribution of litter size frequencies was performed on 3 consecutive artificial inseminations of 2 groups of rabbit does. In the experimental group the does were treated with 30 IU PMSG about 48 hours before the insemination. The second group was a control without treatment. In total 385 Inseminations were performed on multiparous does. The obtained number of htters was 123 in the PMSG group and 142 in the control one. Results showed a significant (P<0.01) increased birth mortality in the PMSG treated does (14.08 %) compared to the controls (6.23 %). The distribution of the frequencies of the litter size was significantly (P<0.05) different in the PMSG group. Especially htters with more than 12 youngs were more numerous (P<0.01) in the PMSG group, respectively 23.7 and 8.4 %. Also an increased number (P<0.06) of small litters ( <5 youngs) was obtained after a PMSG treatment, 18.8 % and 10.5 % respectively. Birth mortality rate after PMSG stimulation was higher in small and large litters but also significantly higher (P<0.001) in litters with 5 to 12 youngs.