Effets du génotype, de l'âge et de la saison sur les composantes de la reproduction chez la Lapine

Abstract

-l'effet de la saison n'est pas homogène selon le caractère considéré.

Growth performances and carcass traits in three strains of rabbits and their two-way crosses

“…This effect is probably due to the negative direct effect of this strain on litter size at weaning (Brun & Rouvier, 1988 (Bolet et al, 1988). The latter arose on one hand from breed differences in ovulation rate between &dquo;CA&dquo; and &dquo;NZ&dquo; (Hulot & Matheron, 1981) and on the other from the selection for litter size in these strains (Matheron & Rouvier, 1977). In this experiment, no significant additive effect was observed on feed efficiency (CI).…”

Effects of dietary seaweed (Ulva lactuca) supplementation on the reproductive performance of buck and doe rabbits

“…Breeding of rabbits during unfavorable seasons could, therefore, impair their reproductive performance. Enhancement of the fertility and sexual receptivity of doe rabbits throughout the year have been achieved by light modification (Arveux & Troislouches 1994), changing the location of does (Luzi & Crimella 1998), adjustments of environmental temperature (Hulot & Matheron 1981), and temporary separation of does from their litter (Pavois et al 1995). Nevertheless, strategies to enhance fertility, sexual desire and semen characteristics of buck rabbits are scarce.…”

A comparison of ovulatory gonadotropic surge in two rabbit strains : no evidence for a relationship between LH or FSH surge and factors of prolificacy

“…The levels reached during preovulatory and postovulatory peaks and the total secreted amount were slightly higher in New Zealand, on the average, but the difference in series 2 was only significant 4 h after mating. Of the two rabbit strains we used, the Californian had the higher number of ovulations and higher embryonic loss (Hulot and Matheron, 1981). On the average, however, basal level and plasma concentrations of LH and FSH before and after ovulation were comparable, although the LH peaks were slightly higher (but not significantly so) in the strain that ovulated less.…”