Yeager Carey P
Psychology Department, University of California, Davis and Graduate Program in Ethology, University of Tennessee, Knoxville.
Am J Primatol. 1990;21(3):223-227. doi: 10.1002/ajp.1350210306.
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.
在印度尼西亚中加里曼丹的丹戎普丁国家公园，对长鼻猴（纳氏长鼻猴）的性行为进行了为期12个月的研究。通过事件抽样法收集了关于一雄多雌群体和全雄群体的交配、献礼及同性爬跨的数据。长鼻猴遵循典型的疣猴类性行为模式，雌性通过摇头、噘嘴和展示后躯来 soliciting 交配。雄性似乎是单次爬跨射精者。观察到对交配中的雌雄对的骚扰以及雌性之间为争夺配偶的竞争。还观察到了同性爬跨（雌性 - 雌性和雄性 - 雄性）。需要更多数据来评估它们的功能。 （注：原文中“soliciting”此处暂未准确翻译出合适中文，可根据上下文进一步优化）
