Estrus and Ovulation in Criollo, Corriedale and Junin Sheep in the Central Sierra of Peru (Estro y Ovulacion en Ovejas Criolla, Corriedale y Junin en la Sierra Central del Peru)

摘要

The reproductive activity is affected by the length of daylight. The magnitude of the photoperiod varies with the geographic latitude. Response of sheep to this variation is more pronounced when they are located far from the equatorial lane. The length of the estrous season also varies with genotype. This study attempted to determine the incidence of estrus and the incidence and rate of ovulation throughout the year in Corriedale, Criollo and Junin sheep under the native range conditions of the High Central Sierra of Peru.