García-Ruiz Irene, Taborsky Michael
Division of Behavioural Ecology, Institute of Ecology and Evolution, University of Bern, 3032 Hinterkappelen, Switzerland.
Department of Ecology, Evolution and Environmental Biology, Columbia University, New York, NY 10027, USA.
iScience. 2024 Jun 20;27(7):110334. doi: 10.1016/j.isci.2024.110334. eCollection 2024 Jul 19.
In cooperative societies, group members typically exchange different commodities among each other, which involves an incessant negotiation process. How is the conflict of fitness interests resolved in this continual bargaining process between unequal partners, so that maintaining the cooperative interaction is the best option for all parties involved? Theory predicts that relatedness between group members may alleviate the conflict of fitness interests, thereby promoting the evolution of cooperation. To evaluate the relative importance of relatedness and direct fitness effects in the negotiation process, we experimentally manipulated both the relatedness and mutual behavioral responses of dominant breeders and subordinate helpers in the cooperatively breeding cichlid fish . Results show that coercion by breeders is crucial for the performance of alloparental egg care by helpers, but that kinship significantly decreases the need for coercion as predicted by theory. This illustrates the relative importance of kinship and enforcement in the bargaining process.
在合作性社会群体中，群体成员通常会相互交换不同的商品，这涉及到一个持续不断的谈判过程。在不平等伙伴之间的这种持续讨价还价过程中，适应性利益冲突是如何解决的，以便维持合作互动对所有相关方来说都是最佳选择？理论预测，群体成员之间的亲缘关系可能会减轻适应性利益冲突，从而促进合作的进化。为了评估亲缘关系和直接适应性效应在谈判过程中的相对重要性，我们通过实验操纵了合作繁殖的丽鱼科鱼类中优势繁殖者和从属帮手的亲缘关系以及相互行为反应。结果表明，繁殖者的强制行为对于帮手进行异亲护卵行为至关重要，但正如理论所预测的，亲缘关系显著降低了强制行为的必要性。这说明了亲缘关系和强制行为在讨价还价过程中的相对重要性。
