Facteurs influençant les paramètres de reproduction des brebis Ouled Djellal

Abstract

The study of the reproductive parameters of the ewes Ouled Djellal (n=269), conducted in semiintensive in semi-arid environment, shows a fertility rate of 88 %, a fecundity rate of 95 % and a prolificacy rate was 111 %. The influence of different factors on the reproduction parameters, highlights on fertility, a significant influence (p<0.05) of the physiological state during the mating, an effect very significant of ewes age and a result highly significant (p<0.001) of mode of mating, of month of mating and for the interaction of physiological state during the mating × mode of mating. For fecundity, there is a significant effect (p<0.05) of the ewes age, very significant (p<0.01) of the physiological state during the mating and highly significant (p<0.001) for mode of mating and the month of mating. As for prolificacy, it is significantly influenced by the physiological state during the mating and very significantly by the month of mating.