Tanaka Mikiko
Primate Research Institute, Kyoto University, Japan.
Am J Primatol. 2007 Oct;69(10):1189-94. doi: 10.1002/ajp.20416.
The population of brown lemurs has rapidly grown since their founders were introduced to the Berenty Reserve. The founders consist of two species (Eulemur fulvus rufus and E. collaris). To characterize the behavior of the population and to examine whether these characteristics affect population growth, I investigated the habitat use and social structure of the population of brown lemurs at Berenty (Berenty Eulemur). Behavior data were collected focusing on horizontal and vertical habitat use, activity rhythms, and intergroup relationships. These data were compared with the data of E. fulvus in other areas, with the previous studies done at Berenty, and with data on Berenty Lemur catta. Berenty Eulemur maintained a home range size comparable to E. f. rufus in the western deciduous dry forest, but was found at a lower level of the forest and had larger overlapping home ranges. Berenty Eulemur use food resources earlier in the morning than L. catta, intergroup conflict was avoided by vocal communication, and Berenty Eulemur made suitable use of their limited habitat. I suggest that a number of behavioral characteristics of Berenty Eulemur may contribute to their population growth.
自从棕色狐猴的奠基者被引入贝伦蒂保护区后，其种群数量迅速增长。奠基者包括两个物种（红褐美狐猴和白领美狐猴）。为了描述该种群的行为特征，并研究这些特征是否影响种群增长，我调查了贝伦蒂（贝伦蒂美狐猴）棕色狐猴种群的栖息地利用情况和社会结构。行为数据的收集重点在于水平和垂直栖息地利用、活动节律以及群体间关系。这些数据与其他地区红褐美狐猴的数据、之前在贝伦蒂开展的研究数据以及贝伦蒂环尾狐猴的数据进行了比较。贝伦蒂美狐猴的家域面积与西部落叶干燥森林中的红褐美狐猴相当，但在森林较低层被发现，且家域重叠面积更大。贝伦蒂美狐猴比环尾狐猴更早利用食物资源，通过声音交流避免群体间冲突，并且贝伦蒂美狐猴对其有限的栖息地进行了合理利用。我认为贝伦蒂美狐猴的一些行为特征可能有助于其种群增长。
