Causes and consequences of intergroup conflict in cooperative banded mongooses
Causes and consequences of intergroup conflict in cooperative banded mongooses
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DOI：
10.1016/j.anbehav.2017.01.017
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发表时间：
2017-04-01
期刊：
影响因子：
2.5
通讯作者：
Cant, Michael A.
中科院分区：
文献类型：
--
作者：
Thompson, Faye J.;Marshall, Harry H.;Cant, Michael A.
群体之间的冲突是许多动物社会的显著特征。最近的理论模型表明，暴力群体间冲突可以塑造群体内合作的模式。然而，尽管它在社会物种中普遍存在，但在人类和黑猩猩（Pan troglodytes）之外，很少有人探索暴力群体间冲突的适应意义。目前对群体间冲突在社会行为演变中的作用的理解的一个障碍是缺乏关于群体间攻击的原因和后果的信息。在这里，我们研究的原因和健身的后果群间冲突的带状猫鼬，蒙戈蒙戈，使用16年的数据集观察到的群间互动，生活史和行为。斑猫鼬是合作繁殖者，生活在高度领土的群体中，并参与频繁，侵略性和暴力的群体间互动。我们发现，整个种群对食物和配偶的竞争加剧，增加了群间互动的可能性，而群间冲突的增加与群体规模不断扩大的时期有关。组间冲突的健身成本减少窝和成人生存，但没有成本怀孕的女性：事实上，女性不太可能流产后，组间的相互作用时，最近没有组间冲突。我们的研究结果表明，组间冲突有可衡量的成本，个人和团体在长期和短期内，和群体之间的冲突水平可能会高到足以影响组内合作行为的模式。确定合作物种中群体间冲突的后果可以揭示群体内冲突与合作的模式，从而促进我们对社会进化的理解。(C)2017作者由Elsevier Ltd代表动物行为研究协会出版。
Conflict between groups is a notable feature of many animal societies. Recent theoretical models suggest that violent intergroup conflict can shape patterns of within-group cooperation. However, despite its prevalence in social species, the adaptive significance of violent intergroup conflict has been little explored outside of humans and chimpanzees, Pan troglodytes. A barrier to current understanding of the role of intergroup conflict in the evolution of social behaviour is a lack of information on the causes and consequences of aggression between groups. Here, we examined the causes and fitness consequences of intergroup conflict in the banded mongoose, Mungos mungo, using a 16-year data set of observed intergroup interactions, life history and behaviour. Banded mongooses are cooperative breeders that live in highly territorial groups and engage in frequent, aggressive and violent intergroup interactions. We found that intensified population-wide competition for food and mates increased the probability of intergroup interactions, and that increased intergroup conflict was associated with periods in which groups were growing in size. Intergroup conflict had fitness costs in terms of reduced litter and adult survival but no cost to pregnant females: in fact, females were less likely to abort following an intergroup interaction than when there had been no recent intergroup conflict. Our results suggest that intergroup conflict has measurable costs to both individuals and groups in the long and short term, and that levels of conflict among groups could be high enough to affect patterns of within-group cooperative behaviour. Establishing the consequences of intergroup conflict in cooperative species can shed light on patterns of conflict and cooperation within groups and, in turn, facilitate our understanding of social evolution. (C) 2017 The Authors. Published by Elsevier Ltd on behalf of The Association for the Study of Animal Behaviour.