© Andie Ang 2014-2019

洪慧芳

灵长类学家

印尼叶猴 (Presbytis femoralis)

 

印尼叶猴是一种亚洲叶猴,体型较小,体长在68-80厘米之间,体重约6公斤。印尼叶猴居住在树上,白天活动,以树叶、水果和种子为食。

 

目前共有至少3个亚种,但至今它的分类仍是个争论的议题: P. femoralis percura 在中东苏门答腊,P. f. robinsoni 在北方马来半岛以及 P. f. femoralis 在新加坡和柔佛。虽然印尼叶猴被列为全球易危,但它却是新加坡最濒危哺乳动物之一。曾遍布于岛上各种森林,如今这既害羞又难以捉摸的动物极危,而且只能在中央集水区自然保护区找到。

 

 

 

印尼叶猴, 柔佛, 马来西亚

照片属 Con Foley

印尼叶猴, 新加坡

照片属 Nick Baker

研究至今

经过三年(2009-2011)的野外和实验室研究,我估计新加坡仅剩40只印尼叶猴,比往年的统计多了一倍 [1]。在这三年里,每逢六月或七月,我也观察到新生猴婴 [1]。此外,我记录27个印尼叶猴喂食的植物物种,当中近一半在本地受威胁。通过遗传基因研究,我发现新加坡的印尼叶猴有着非常低的遗传变异 [2]。所以,即便印尼叶猴的数量增加,过往的数量瓶颈已严重地影响它们的遗传多样性,使保育它们的工作变得更加困难。

目前 (2017-) 展开研究三个主要目标 [4]:

目标 1: To recover and protect RBL in the wild, ensuring that:

  • the rainforest habitat of the taxon is intact, where necessary restored

  • wild populations are connected where needed

  • genetic and demographic viability are ensured

目标 2: To gather key data through ongoing studies, ensuring that:

  • its taxonomy and systematics are clarified, and the biology and ecology understood

  • long-term monitoring and conservation research are in place

目标 3: To secure the necessary resources and commitments for long-term conservation, ensuring that:

  • there is strong public awareness and government support

  • cross-country collaboration is strengthened and long-term financial support has been secured 

 

参考书目

[1] Ang A., M. Ismail and R. Meier, 2010. Reproduction and infant pelage coloration of the banded leaf monkey, Presbytis femoralis (Mammalia: Primates: Cercopithecidae) in Singapore. Raffles Bulletin of Zoology 58, 411-415

[2] Ang A., A. Srivathsan, B.M. Md.-Zain, M. Ismail and R. Meier, 2012. Low genetic variability in the recovering urban banded leaf monkey population of Singapore. Raffles Bulletin of Zoology 60, 589-594

[3] Srivathsan A., A. Ang, A.P. Vogler and R. Meier, 2016. Fecal metagenomics for the simultaneous assessment of diet, parasites, and population genetics of an understudied primate. Frontiers in Zoology 13, 17

[4] Ang A., V. D'Rozario, S.L. Jayasri, C.M. Lees, T.J. Li and S. Luz, 2016. Species action plan for the conservation of Raffles' banded langur (Presbytis femoralis femoralis) in Malaysia and Singapore. IUCN SSC Conservation Breeding Specialist Group, Apple Valley, MN, USA