Cords Marina
Ethology and Wildlife Biology, Zoological Institute, University of Zürich-Irchel, Zürich, Switzerland.
Am J Primatol. 1990;21(2):101-114. doi: 10.1002/ajp.1350210204.
Sympatric guenons in East Africa associate with one another in mixed-species groups to an intermediate degree. This makes it possible to compare a given group's ecology and behavior when it is part of an association to when it is unaccompanied, and to correlate association tendency with various ecological parameters. Two studies incorporating these approaches have been made of sympatric Cercopithecus ascanius and C. mitis monkeys in the Kakamega Forest, Kenya, and the Kibale Forest, Uganda. The pattern of and reasons for association in each site are reviewed. Compared to Kakamega, association between C. ascanius and C. mitis in Kibale occurs less often, and the species appear to benefit relative to one another in different ways. These results suggest that the particular ecological setting greatly influences the nature of the interaction between species, through its effect on population structure, dietary overlap, food distribution, and community composition. The major ecological differences between the two study areas probably reflect post-Pleistocene history and possibly climate, but they have important consequences for the present-day population structure and feeding ecology of each species, and hence affect relations between them as well.
东非同域分布的长尾猴会以中等程度形成混合物种群体并相互关联。这使得我们能够比较一个特定群体在处于关联状态时和单独存在时的生态与行为，并将关联倾向与各种生态参数进行关联。针对肯尼亚卡卡梅加森林和乌干达基巴莱森林中同域分布的红耳长尾猴和蓝长尾猴，已有两项研究采用了这些方法。本文对每个地点的关联模式及原因进行了综述。与卡卡梅加相比，基巴莱的红耳长尾猴和蓝长尾猴之间的关联发生频率较低，而且这两个物种似乎以不同方式相互受益。这些结果表明，特定的生态环境通过对种群结构、饮食重叠、食物分布和群落组成的影响，极大地影响了物种间相互作用的性质。这两个研究区域之间的主要生态差异可能反映了更新世后的历史，也可能与气候有关，但它们对每个物种当前的种群结构和觅食生态有着重要影响，进而也影响着它们之间的关系。
