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2.
麻阳河国家级自然保护区黑叶猴野外投食群动态观察
张鹏, 颜修刚, 石运, 杨德, 王彬, 李伟, 杨远露, 杨朝辉, 吴光阳, 蔡鸷, 李思尧, 邹浩, 张璠
兽类学报
2023, 43 (6):
753-759.
DOI: 10.16829/j.slxb.150707
From 2009 to 2021, a direct observation method was used to track and monitor a provisioned group of
Trachypithecus francoisi in Mayanghe National Nature Reserve. The observation period covered 1 846 days with an average annual working days of 142. In total, 31 adults (15 males, 16 females) were observed and, in addition, 26 babies were born with a male-female ratio of 1.2∶1 (14 male, 12 female) of which 15 infants survived (7 males, 8 females), a survival rate of 57.7%. For the whole group, the average annual monkey group birth rate was about 22.8% and the annual loss rate was about 11.4%. The number of births exhibited a bimodal distribution, peaking from February to April and from July to October. The average reproductive interval of adult monkeys was 18.7 months but shortened to 16.3 months after the death or disappearance of a newborn. During 2019 -2021, the average growth rate of the group was 11.4%, the number of monkeys had generally stabilized and was self-sustaining. However, as of the end of December 2021, the feeding group had dwindled to just nine individuals (two males and seven females) due to individual deaths, disappearances, and expulsions of some sub-adults. There were no infants or juveniles and insufficient sub-adults. Furthermore, the proportion of middle-aged and elderly individuals was high, resulting in an imbalanced age structure. This study provides basic data related to long-term monitoring of wild
Trachypithecus francoisi in Mayanghe National Nature Reserve. This has provided an important basis for follow-up scientific research, educational projects, and monitoring and management of
Trachypithecus francoisi in the reserve. Moreover, it has ensured that this flagship species and its habitats are effectively protected and sustainably used, so as to promote the high-quality development of biodiversity protection in this region.
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