Mutation-selection equilibrium in games with multiple strategies.

Mutation-selection equilibrium in games with multiple strategies.
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DOI:
10.1016/j.jtbi.2009.02.010
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发表时间:
2009-06-21
影响因子:
2
通讯作者:
Nowak, Martin A.
Nowak, Martin A.
中科院分区:
生物学4区
文献类型:
--
作者:
Antal, Tibor;Traulsen, Arne;Ohtsuki, Hisashi;Tarnita, Corina E.;Nowak, Martin A.

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在进化博弈中,个体的适应度不是常数,而是取决于种群中各种策略的相对丰度。在这里,我们研究一般的游戏中的n个策略的人口大,但有限的大小。我们探讨弱选择下的随机演化动力学,但对于任何突变率。我们分析了充分混合群体中的频率依赖Moran过程,但Wright-Fisher和Pairwise Comparison过程发现了几乎相同的结果。令人惊讶的是,简单的条件指定了在突变选择平衡中,一种策略是否比1/n或另一种策略的平均丰度更高。我们找到了一个条件,适用于低突变率和另一个条件,适用于高突变率。这两个条件的线性组合适用于任何突变率。我们的结果使得在弱选择极限下的n × n对策具有一个完整的特征.
In evolutionary games the fitness of individuals is not constant but depends on the relative abundance of the various strategies in the population. Here we study general games among n strategies in populations of large but finite size. We explore stochastic evolutionary dynamics under weak selection, but for any mutation rate. We analyze the frequency dependent Moran process in well-mixed populations, but almost identical results are found for the Wright-Fisher and Pairwise Comparison processes. Surprisingly simple conditions specify whether a strategy is more abundant on average than 1/n, or than another strategy, in the mutation-selection equilibrium. We find one condition that holds for low mutation rate and another condition that holds for high mutation rate. A linear combination of these two conditions holds for any mutation rate. Our results allow a complete characterization of n × n games in the limit of weak selection.
DOI: 10.1016/j.jtbi.2008.11.023
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