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Birth Processes and Related Behaviors of Yunnan Snub-nosed Monkeys in Baimaxueshan Nature Reserve

Birth Processes and Related Behaviors of Yunnan Snub-nosed Monkeys in Baimaxueshan Nature Reserve

Mei Zhao1,2, Xiaoqin Zeng1, Wancai Xia1, Baoping Ren3,4, Hao Feng1, Fan Wang1, Qihai Zhou5,6* and Dayong Li1,7*

1Key Laboratory of Southwest China Wildlife Resources Conservation (Ministry of Education), China West Normal University, Nanchong 637009, Sichuan Province, China
2Department of Basic Medical Biology, Medical College of North Sichuan Medical College, Nanchong 637007, Sichuan Province, China
3Key Laboratory for Ecology of Tropical Islands (Ministry of Education), Hainan Normal University, Haikou 571158, Hainan Province, China
4Key Laboratory of Tropical Animal and Plant Ecology of Hainan Province, Hainan Normal University, Haikou 571158, Hainan Province, China
5Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Ministry of Education), Guangxi Normal University, Guilin 541001, Guangxi Province, China
6Guangxi Key Laboratory of Rare and Endangered Animal Ecology, Guangxi Normal Univeristy, Guilin 541001, Guangxi Province, China
7Institute of Rare Animals and Plants, China West Normal University, Nanchong 637009, Sichuan Province, China.
 
Mei Zhao and Xiaoqin Zeng contributed equally to the paper.
 
* Corresponding author: 980119lsc@163.com, zhouqh@ioz.ac.cn

ABSTRACT

Birth processes and related behaviors are the crucial events in mammalian reproduction. However, detailed reports of birth processes and related behaviors in wild nonhuman primates in their natural habitats are rare. Here, we document our observations of birth processes and related behaviors via scan sampling and focal animal samples during the birth of two infant Yunnan snub-nosed monkeys (Rhinopithecus bieti) in 2017. One of the infants was born during diurnal to a multiparous female, while the other one was a nocturnal birth to a primiparous female. Actual parturition lasted only 7 min for diurnal birth. During the parturition process, the mother received what could be described as assistance in delivery from the other females and resident male within one male unit. During each of the two births, the one-male unit’s resident male patrolled the area to keeping it secure. After birth, other members of the unit showed intense interest in the neonate. Adult females are more skilled and efficient in handling infants than sub-adult females. Our results will serve to advance our understanding of this important life history event in nonhuman primates.

 

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Pakistan Journal of Zoology

August

Vol. 54, Iss. 4, Pages 1501-2001

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