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Notes on the sexual behavior of the proboscis monkey (Nasalis larvatus)

โœ Scribed by Carey P. Yeager

Publisher
John Wiley and Sons
Year
1990
Tongue
English
Weight
381 KB
Volume
21
Category
Article
ISSN
0275-2565

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โœฆ Synopsis

Proboscis monkey (Nasalis larvatus) sexual behavior was studied at the Tanjung Puting National Park in Kalimantan Tengah, Indonesia, for 12 months. Data were collected on one-male groups and all-male groups using event sampling for copulations, presents, and same-sex mounts. Proboscis monkeys follow typical colobine patterns of sexual behavior with females soliciting copulations through head shaking, pout face, and the presentation of the hindquarters. Males appear to be single-mount ejaculators. Harassment of copulating pairs and female-female competition for a mate were observed. Same-sex mounts (female-female and male-male) were also observed. Additional data are needed to evaluate their function.

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