Costs dictate strategic investment in dominance interactions.
Costs dictate strategic investment in dominance interactions.
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DOI：
10.1098/rstb.2020.0447
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发表时间：
2022-02-28
期刊：
影响因子：
--
通讯作者：
Farine DR
中科院分区：
文献类型：
--
作者：
Dehnen T;Papageorgiou D;Nyaguthii B;Cherono W;Penndorf J;Boogert NJ;Farine DR
支配地位对于获取资源很重要。由于支配性互动的成本很高，因此个人应该对与谁互动有策略。一种假设是，个人应该将代价高昂的互动与地位最接近的人进行互动，因为他们从赢得这种互动中获得最大的收益（在获得或维持主导地位方面）。在这里，我们表明，雄性秃鹫珍珠鸡（Acryllium vulturinum）是一种具有陡峭优势等级的群居物种，它会战略性地对群体等级中排名紧靠自己下方的雄性表达更高成本的攻击性互动。相比之下，较低成本的攻击性互动则针对层级较低的群体成员。通过直接评估针对竞争对手的高成本和低成本攻击性互动的战略使用差异，我们发现个人不成比例地对比自己低一到三级的男性使用最高成本的互动（例如追逐）。我们的结果支持这样的假设：与不同互动类型相关的成本可以决定它们在具有陡峭统治等级的社会群体中的表达。本文是主题“啄食顺序一百周年：支配等级研究的现状和未来前景”的一部分。
Dominance is important for access to resources. As dominance interactions are costly, individuals should be strategic in whom they interact with. One hypothesis is that individuals should direct costly interactions towards those closest in rank, as they have most to gain—in terms of attaining or maintaining dominance—from winning such interactions. Here, we show that male vulturine guineafowl (Acryllium vulturinum), a gregarious species with steep dominance hierarchies, strategically express higher-cost aggressive interactions towards males occupying ranks immediately below themselves in their group's hierarchy. By contrast, lower-cost aggressive interactions are expressed towards group members further down the hierarchy. By directly evaluating differences in the strategic use of higher- and lower-cost aggressive interactions towards competitors, we show that individuals disproportionately use highest-cost interactions—such as chases—towards males found one to three ranks below themselves. Our results support the hypothesis that the costs associated with different interaction types can determine their expression in social groups with steep dominance hierarchies. This article is part of the theme issue ‘The centennial of the pecking order: current state and future prospects for the study of dominance hierarchies’.
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