1. The reproductive behavior of seven captive mandrills (Mandrillus sphinx) were observed in Chengdu Zoo by using All-occurrence Sampling Methods from January to September in 2001. The results indicated that During estrus, the perineum of the female swelled and turned to be red.
2001年1～9月，在成都动物园用所有事件取样法对人工饲养状态下7只（5♀♀，2♂♂）山魈的繁殖行为进行了观察。