Rijsdijk Kenneth F, Croll Jasper C, Hume Julian P, Janoo Anwar, Aguilée Robin, De Groeve Johannes, Kentie Rosemarie, Schilthuizen Menno, Warren Ben H, Claessens Leon P A M
Institute for Biodiversity and Ecosystem Dynamics (IBED), TCE, University of Amsterdam, P.O. Box 94240, Amsterdam 1090 GE, The Netherlands.
Bird Group, Department of Life Sciences, Natural History Museum, Akeman St, Herts, Tring HP23 6AP, UK.
iScience. 2024 Oct 22;27(11):111236. doi: 10.1016/j.isci.2024.111236. eCollection 2024 Nov 15.
Why aggressive traits evolve in some species but not in others is poorly understood. We modeled the population dynamics of the extinct Mauritius dodo and Rodrigues solitaire to examine divergent pathways in the evolution of aggression. Whereas the dodo conformed to island syndrome predictions of tameness, its sister-taxon the solitaire evolved strong sexual dimorphism and aggressive traits. We computed rates of change in island size from sea level modeling and connected island size change to population dynamics by integrating a Hawk-Dove game theory model for territory competition with a population model. We find that the rapid rate of decrease in island size likely was an important trigger for the onset of aggressive behavior and that aggressive behavior becomes fixed if a tipping point is reached where island size falls below a critical threshold.
为何攻击性特征会在某些物种中进化而在其他物种中却不会，这一点目前还知之甚少。我们对已灭绝的毛里求斯渡渡鸟和罗德里格斯孤鸽的种群动态进行了建模，以研究攻击性进化中的不同路径。渡渡鸟符合岛屿综合征中温顺的预测，而它的姐妹分类群孤鸽则进化出了强烈的两性异形和攻击性特征。我们通过海平面建模计算了岛屿面积的变化率，并将岛屿面积变化与种群动态联系起来，方法是将一个用于领地竞争的鹰鸽博弈论模型与一个种群模型相结合。我们发现，岛屿面积的快速减小很可能是攻击性行为开始的一个重要触发因素，并且如果岛屿面积降至临界阈值以下的临界点，攻击性行为就会固定下来。
