ElWisby A B
Beitr Trop Landwirtsch Veterinarmed. 1979;17(1):77-83.
In a buffalo herd at Amara Buffalo Breeding Station between October 1975 and October 1976 various features were investigated of the reproductive performance of heifers. The average age of the heifers was 22.01 at first estrus, 22.50 at ovulation, 26.05 at conception, and 38.8 months at calving. Estrus occurred at an average interval of 72.7 days after calving. Extended post-partum anestrus for more than 90 days was observed in 26.8% of the animals studied. The average length of the calving interval was calculated as 408 days. 67.3% of the calvings took palce between June and October.
1975年10月至1976年10月期间，在阿马拉水牛繁育站的一群水牛中，对小母牛的繁殖性能的各种特征进行了调查。小母牛初情期的平均年龄为22.01岁，排卵时为22.50岁，受孕时为26.05岁，产犊时为38.8个月。产后发情平均间隔为产犊后72.7天。在26.8%的被研究动物中观察到产后长期乏情超过90天。产犊间隔的平均长度计算为408天。67.3%的产犊发生在6月至10月之间。
