The role of the residence-effect on the outcome of intergroup encounters in Verreaux's sifakas.
The role of the residence-effect on the outcome of intergroup encounters in Verreaux's sifakas.
复制标题
居住效应对Verreaux Sifakas中群体间相遇结果的作用。
DOI：
10.1038/srep28457
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发表时间：
2016-06-22
影响因子：
4.6
通讯作者：
Fichtel C
中科院分区：
文献类型：
--
作者：
Koch F;Signer J;Kappeler PM;Fichtel C
在群居物种中，群间竞争对个体的生存和适应性有着重要的影响。然而，影响赢得遭遇战的概率的因素还没有完全了解。我们研究了数量上的优势和位置的遭遇的影响，在八个相邻的组Verreaux的狐猴（Propithecus verreauxi），在基林迪森林，马达加斯加西部的获胜机会。群体间的遭遇是从两年期间通过GPS记录仪收集的空间数据推断出来的。位置，即，在一次特定的遭遇战中，一个小组与各自核心区域的接近程度，而不是人数上的优势，影响了获胜的可能性。因此，居民群体对专属和密集使用地区的高度重视增加了他们保护这些地点不受入侵者侵犯的动机。此外，在遭遇战后的一个月内，失败者使用遭遇战区域的次数少于胜利者，这表明失败也会带来长期成本。因此，我们的研究结果表明，在群居动物中，每次相遇的特殊情况，如地点，可以超过群体特征，并预测赢得群体间相遇的机会。
Intergroup competition has an important impact on the survival and fitness of individuals in group-living species. However, factors influencing the probability of winning an encounter are not fully understood. We studied the influence of numerical advantage and location of the encounter on the chances of winning in eight neighboring groups of Verreaux’s sifakas (Propithecus verreauxi), in Kirindy Forest, western Madagascar. Intergroup encounters were inferred from spatial data collected via GPS loggers over a period of two years. Location, i.e., the proximity to the respective core area, rather than the numerical advantage of a group in a given encounter, influenced the probability of winning. Accordingly, the high value that resident groups attribute to exclusive and intensively used areas increased their motivation in defending these locations against intruders. Moreover, losers used the encounter area less often than winners within a month after the encounter, suggesting that losing also entails long-term costs. Thus, our results suggest that in gregarious animals the particular circumstances of each encounter, such as the location, can outweigh group characteristics and predict the chances of winning an intergroup encounter.