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| The Reproductive Behavior of Captive Mandrills ( Mandrillus sphinx) |
| ZHANGJun HU Jinchu ZHONG Shunlong FEI Lisong WANGQiang CHEN Hongwei DENGJiabo |
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Abstract The reproductive behavior of seven captive mandrills (Mandrillus sphinx) were observed in Chengdu Zoo by using Alloccurrence SamplingMethods fromJanuary to September in 2001. The results indicated that During estrus, the perineumof the female swelled and turned to be red. Estrus synchrony between the females and the males in a group was found in captive. Reproduction was not apparently seasonal. The menstrual cycle was 30.55 ±0.77 days (N = 11) and the menstrual duration was 2.38 ±0.13 days. The mandrills were found to have apparent copulatory patterns that included teeth-chattering, mounting, inserting, and thrusting. The mating behavior occurs generally in daytime and it lasted 14.90 ±0.34 seconds (N = 246). Mating gesture was face-to-back type. The gestation was about 163 - 175 days, with an average of 171.13 ±4.19 (N = 8) days. The birth occured at night and lasted 2 - 3 hours. The mandrill observed gave birth to only one offspring each. The lactating time decreased as the young grew up, but lactation played an important role before weaning took place.
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