Home-range use and intergroup encounters in western gorillas (Gorilla g. gorilla) at Lossi Forest, north Congo
Home-range use and intergroup encounters in western gorillas (Gorilla g. gorilla) at Lossi Forest, north Congo
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DOI：
10.1002/ajp.20073
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发表时间：
2004-10-01
影响因子：
2.4
通讯作者：
Bermejo, M
中科院分区：
文献类型：
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作者：
Bermejo, M
我目前的数据家庭范围内的使用和类型的组间接触的一组（阿波罗）西部大猩猩（大猩猩大猩猩）从一个新的研究地点在刚果共和国。焦点群的总活动范围大小是11公里（2），我是通过在地图上的每日行进路线上叠加一个100米x 100毫米的网格计算出来的。大部分（73%）的组的家庭范围是专门使用的，虽然在外围，它与其他三个组的范围重叠。大多数遭遇（86%）与其他群体（n = 14）发生在周边的家庭范围，似乎涉及到果树。焦点组银背的遭遇孤独银背发生在整个焦点组的家庭范围，不涉及获得水果，并通常导致侵略或回避行为。焦点组银背的其他组男性的反应是多种多样的：它包括宽容（64%），避免（14%），和侵略（21%），并依赖于身份的extragroup男性。焦点组表现出一种不寻常的形式的容忍行为对其他一些群体偶尔形成“巢超组”（两组嵌套在一起过夜，距离30-50米）。洛西的西部大猩猩在它们的群体中有些流动性。亚群和超群出现了，虽然比以前报道的要少，而且有一个新的转折：亚群并不一定需要银背的存在。我强调需要种内比较和更完整的数据集西部大猩猩的社会组织。(C)2004 Wiley-Liss，Inc.
I present data on home-range use and types of intergroup encounters for one group (Apollo) of western gorillas (Gorilla gorilla gorilla) from a new study site in the Republic of Congo. The total home-range size of the focal group, which I calculated by superimposing a 100 m x 100 mm grid over the mapped daily path traveled, was 11 km(2). The majority (73%) of the group's home range was used exclusively, although at the periphery it overlapped with the ranges of three other groups. Most encounters (86%) with other groups (n = 14) took place in the periphery of the home range, and appeared to involve access to fruit trees. The focal group silverback's encounters with solitary silverbacks occurred throughout the focal group's home range, did not involve access to fruit, and typically resulted in aggressive or avoidance behavior. The focal group silverback's response to other group males was more varied: it included tolerance (64%), avoidance (14%), and aggression (21%), and was dependent upon the identity of the extragroup male. The focal group exhibited an unusual form of tolerant behavior toward some other groups by occasionally forming "nesting supergroups" (two groups nested together overnight at distances of 30-50 m). The western gorillas at Lossi were somewhat fluid in their grouping. Subgrouping and supergrouping occurred, although more infrequently than reported previously, and with a new twist: subgrouping did not necessarily require a silverback's presence. I stress the need for intraspecific comparisons and more complete data sets on western gorilla social organization. (C) 2004 Wiley-Liss, Inc.