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首页> 外文期刊>American Journal of Physical Anthropology >Cheek Pouch Use, Predation Risk, and Feeding Competition in Blue Monkeys (Cercopithecus mitis stuhlmanni)
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Cheek Pouch Use, Predation Risk, and Feeding Competition in Blue Monkeys (Cercopithecus mitis stuhlmanni)

机译：蓝猴（Cercopithecus mitis stuhlmanni）颊袋的使用，捕食风险和喂养竞争

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摘要

The adaptive function of cheek pouches in the primate subfamily Cercopithecinae remains unresolved. By analyzing the circumstances of cheek pouch use, we tested two hypotheses for the evolution of cercopithecine cheek pouches proposed in earlier studies: (1) cheek pouches reduce vulnerability to predation, and (2) cheek pouches increase feeding efficiency by reducing competition. We studied two groups of wild blue monkeys (Cercopithecus mitis stuhlmanni) in the Kakamega Forest, Kenya, conducting focal observations of feeding individuals. Monkeys were less exposed while emptying their cheek pouches than filling them, supporting the predation-avoidance hypothesis. We investigated several measures of competitive threat, but only one supported the competition-reduction hypothesis: when the nearest neighbor's rank increased, subjects were more likely to increase than to decrease cheek pouch use. Overall, our findings supported the predation-avoidance hypothesis more strongly than the competition-reduction hypothesis. We suggest that variation in cheek pouch use may reflect differing behavioral strategies used by cercopithecines to mitigate competition and predation, as well as factors such as resource size and distribution, home range size, and travel patterns. Am J Phys Anthropol 137:334-341, 2008. (c) 2008 Wiley-Liss, Inc.
机译：灵长类动物皮科科的脸颊袋的适应功能仍未解决。通过分析脸颊袋的使用环境，我们测试了较早研究中提出的头孢类素脸颊袋演变的两个假设：（1）脸颊袋降低了被捕食的脆弱性;（2）脸颊袋通过减少竞争而提高了饲喂效率。我们在肯尼亚的卡卡梅加森林中研究了两组野生蓝猴（Cercopithecus mitis stuhlmanni），进行了喂养个体的重点观察。清空脸颊袋时，猴子暴露的机会少于填充它们的次数，从而支持了避免捕食的假说。我们研究了几种竞争威胁措施，但是只有一种方法支持减少竞争的假设：当最近邻居的排名提高时，受试者增加的可能性要大于减少脸颊袋的使用率。总体而言，我们的研究结果比竞争减少假说更能支持捕食回避假说。我们建议脸颊袋使用的变化可能反映了头孢噻吩类药物使用不同的行为策略来缓解竞争和掠食，以及资源大小和分布，家庭范围大小和出行方式等因素。 Am J Phys Anthropol 137：334-341，2008年。（c）2008 Wiley-Liss，Inc.

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