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Observation of intra-group and extra-group copulation and reproductive characters in free ranging groups of western black crested gibbon(nomascus concolor jingdongensis)

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Integrative Zoology 2013年第4期8卷 427-440页

作者： Bei HUANG Zhenghua GUAN Qingyong NI Joseph D.ORKIN Pengfei FAN Xuelong JIANG State Key Laboratory of Genetic Resources and Evolution Kunming Institute of ZoologyChinese Academy of SciencesKunmingYunnanChina Graduate School of Chinese Academy of Sciences BeijingChina College of Animal Science and Technology Sichuan Agriculture UniversityYa’anSichuanChina Department of Anthropology Washington University in St.LouisSt.LouisMissouriUSA Institute of Eastern-Himalaya Biodiversity Research Dali UniversityDaliYunnanChina

Black crested gibbons(nomascus concolor)are 1 of only 3 gibbon species that have been observed in long-term polygynous groups,but their mating behavior and reproductive characters have never been *** on population monitoring over 7 years and direct observation for 26 months of the study groups in Wuliang Mountain,central Yunnan,we describe for the first time the copulation behavior and breeding pattern of free-ranging western black crested *** gestation period of black crested gibbons is estimated to be between 6 and 7 *** average breeding interval is 3.5 years,with infant independence at approximately 2.5 *** observed 2 intra-group copulations and 5 extra-group *** were initiated when a female gave a‘solicitation’*** a male made any mating attempt,the female might refuse *** results demonstrate direct female mate *** male and female gibbons dispersed from their natal groups and sometimes replaced paired adults in other *** observed no evidence of infanticide during inter-group conflicts or after replacement of *** with extra-group copulations,these phenomena indicate a flexible social organization and complex mating *** also observed a male-biased sex ratio among *** genetic work is necessary to describe the effects of inter-group copulation and the genetic diversity of this population.

关键词： copulation behavior mating system nomascus concolor reproductive characters Wuliang Mountain

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Proximity association in polygynous western black crested gibbons(nomascus concolor jingdongensis):network structure and seasonality

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Zoological Research 2013年第1期34卷 1-8页

作者： Zhen-Hua GUAN Bei HUANG Wen-He NING Qing-Yong NI Xue-Long JIANG State Key Laboratory of Genetic Resources and Evolution Kunming Institute of Zoologythe Chinese Academy of SciencesKunming 650223China University of the Chinese Academy of Sciences Beijing 100049China College of Animal Science&Technology Sichuan Agriculture UniversityYa'an Sichuan 625014China

We investigated the structure and seasonality of the proximity network in a group of polygynous western black crested gibbons(nomascus concolor)using social network *** spatial proximity changed seasonally and was affected by temperature and *** proximity association was not distributed randomly among *** was one explanation for the social structure,as offspring preferred to maintain close proximity with their *** proximity of infants to mothers decreased with age,and independent offspring had lower proximity to mothers than dependent *** found that the adult male had different proximity relationships with two different adult *** frequency of proximity between the male and the infant-carrying female was significantly higher than that between the male and the female who had immigrated carrying one offspring of uncertain paternity into the *** avoidance and/or predation protection for dependent infants might explain the proximity relationship *** influenced group proximity association,with individual proximity increasing in the cold months and decreasing in the hot *** proximity decreased in months with higher anthropogenic disturbance.

关键词： Proximity nomascus concolor Polygynous Social network

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