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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)

引用

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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