细粒度环境中的复制子:适应性和多态性
Replicators in Fine-grained Environment: Adaptation and Polymorphism
摘要:
时间周期环境中的选择是通过两人复制动力学建模的。对于足够快的环境变化,这被简化为恒定环境中的多玩家复制因子动态。两个玩家的条件对应于时间平均收益,而三个和四个玩家的条件来自于变形对不同环境的适应。这样的多玩家(自适应)条款可以诱导稳定的多态性。伙伴关系博弈[遗传选择]中多态性的建立伴随着种群平均适合度的下降。
英文摘要:
Selection in a time-periodic environment is modeled via the two-player replicator dynamics. For sufficiently fast environmental changes, this is reduced to a multi-player replicator dynamics in a constant environment. The two-player terms correspond to the time-averaged payoffs, while the three and four-player terms arise from the adaptation of the morphs to their varying environment. Such multi-player (adaptive) terms can induce a stable polymorphism. The establishment of the polymorphism in partnership games [genetic selection] is accompanied by decreasing mean fitness of the population.
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