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Abundance and community structure of Mentawai primates in the Peleonan forest, north Siberut, Indonesia

机译:印度尼西亚北部西伯鲁特Peleonan森林中的Mentawai灵长类动物的数量和群落结构

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The island of Siberut in the Mentawai Archipelago, west of Sumatra, Indonesia, supports four of the five primate species endemic to the Archipelago, all categorized as threatened on the IUCN Red List. As a baseline for future research on the ecology and conservation of Siberut's primates we used a line-transect approach to survey primates in the Peleonan forest, site of the Siberut Conservation Project in northern Siberut. In 104 km of surveys we made a total of 391 observations of primates and estimated density and population sizes for the Project's 10.7 km~2 main study site. Overall primate biomass density was estimated to be 697 kg km ~(-2) and abundances, in individuals km~(-2) , were: pig-tailed snub-nosed langur Simias concolor, 53.1; Siberut macaque Macaca siberu, 16.2; Kloss's gibbon Hylobates klossii, 8.9; Mentawai langur Presbytis potenziani, 8.2. These results confirm those from earlier studies that in undisturbed and unhunted primary forests S. concolor is more successful than the sympatrically occurring P. potenziani. Results for all species suggest considerable population sizes on the island and underline its importance for the conservation of Mentawai primates.
机译:印度尼西亚苏门答腊以西的文塔瓦伊群岛的西伯鲁特岛,是该群岛特有的五种灵长类物种中的四种,这些物种都被列为世界自然保护联盟红色名录中的濒危物种。作为将来对西伯利亚的灵长类动物的生态学和保护研究的基准,我们使用线横断面法对位于西伯鲁特北部的Siberut保护项目所在地的Peleonan森林中的灵长类动物进行了调查。在104公里的调查中,我们对该项目10.7 km〜2的主要研究地点的灵长类动物以及估计的密度和种群大小进行了391次观察。灵长类动物的总生物量密度估计为697 kg km〜(-2),个体km〜(-2)的丰度为:猪尾冷鼻叶猴Simias concolor,53.1;猕猴猕猴猕猴,16.2; Kloss的长臂猿Hylobates klossii,8.9; Mentawai叶猴Presbytis potenziani,8.2。这些结果证实了来自较早研究的结果,即在未受干扰和未受猎捕的原始森林中,S。concolor比同属发生的P. potenziani更成功。所有物种的结果表明,该岛上的种群数量相当可观,并强调了其对保护Mentawai灵长类动物的重要性。

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