Weak, but not strong, ties support coalition formation among wild female chimpanzees
Weak, but not strong, ties support coalition formation among wild female chimpanzees
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DOI：
10.1098/rstb.2021.0427
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发表时间：
2023-01-16
影响因子：
6.3
通讯作者：
Thompson, Melissa Emery
中科院分区：
文献类型：
--
作者：
Fox, Stephanie A.;Muller, Martin N.;Thompson, Melissa Emery
在群居物种中，个体可能能够通过利用与熟悉的、宽容的伙伴的关系来克服对合作的竞争限制。虽然强大的社会关系与几种社会性哺乳动物的合作有关，但尚不清楚薄弱的社会关系能在多大程度上支持合作，特别是非亲属之间的合作。我们利用10年来野生雌性黑猩猩的行为数据，检验了弱附属社会关系支持合作联盟形成的假设。雌性黑猩猩通常在成年后分散并与非亲属生活在一起。他们的社会关系是不同的，但往往相对较弱，很少有二人分享牢固的纽带。雌性偶尔会结成攻击性的联盟。关系质量的三个衡量标准--政党联系、五米接近程度和二人组是否打扮得体--对联盟有积极的预测作用，表明关系质量影响联盟伙伴关系。然而，频繁修剪的双胞胎并不比偶尔修剪的双胞胎形成更多的联盟，考虑到他们的关系质量，亲戚之间的合作并不比预期的多。因此，牢固的纽带和亲情并没有促进合作。我们的结论是，雌性黑猩猩之间的合作联盟取决于社会的容忍度，但不需要牢固的纽带。我们的发现强调了社会宽容是女性培养合作关系的一条独特途径。这篇文章是《女性之间的合作：进化和跨文化视角》主题的一部分。
In social species, individuals may be able to overcome competitive constraints on cooperation by leveraging relationships with familiar, tolerant partners. While strong social ties have been linked to cooperation in several social mammals, it is unclear the extent to which weak social ties can support cooperation, particularly among non-kin. We tested the hypothesis that weakly affiliative social relationships support cooperative coalition formation using 10 years of behavioural data on wild female chimpanzees. Female chimpanzees typically disperse and reside with non-kin as adults. Their social relationships are differentiated but often relatively weak, with few dyads sharing strong bonds. Females occasionally form aggressive coalitions together. Three measures of relationship quality-party association, five-metre proximity and whether a dyad groomed-positively predicted coalitions, indicating that relationship quality influenced coalition partnerships. However, dyads that groomed frequently did not form more coalitions than dyads that groomed occasionally, and kin did not cooperate more than expected given their relationship quality. Thus, strong bonds and kinship did not bolster cooperation. We conclude that cooperative coalitions among female chimpanzees depend on social tolerance but do not require strong bonds. Our findings highlight social tolerance as a distinct pathway through which females can cultivate cooperative relationships.This article is part of the theme issue 'Cooperation among women: evolutionary and cross-cultural perspectives'.