1980, pp 107-146

Dusky and Banded Leaf Monkeys

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Abstract

The Asian colobines are the most abundant and taxonomically diverse of all non-human primates in Asia. Their adaptive success undoubtedly lies in their possession of a sacculated stomach, which permits digestion of cellulose by bacterial fermentation (Bauchop, 1971), and thereby allows exploitation of the vegetative part of the primary production, which is less available to most other primates and arboreal mammals. Of the three colobine species in Peninsular Malaysia, the behaviour and ecology of the two widely-occurring sympatric species are the subject of this chapter.