Behavioral Responses in Structured Populations Pave the Way to Group Optimality
Behavioral Responses in Structured Populations Pave the Way to Group Optimality
复制标题
DOI：
10.1086/663691
复制
发表时间：
2012-02-01
影响因子：
2.9
通讯作者：
Van Cleve, Jeremy
中科院分区：
文献类型：
--
作者：
Akcay, Erol;Van Cleve, Jeremy
关于社会行为的一个悬而未决的争议是，自然选择可能导致在社会群体水平上最大化适应性的行为，但在个人水平上代价高昂。除了克隆群体的特殊情况外，我们对群体最优行为如何以及何时进化没有一般性的理解，特别是当所讨论的行为是灵活的时候。为了解决这个问题，我们开发了一个通用模型，将社会互动中的行为可塑性与结构化群体中的自然选择行为相结合。我们发现，即使没有克隆群体，如果个体对彼此的行为表现出适当的行为反应，群体最优行为也可以进化。这种行为反应的演变反过来又取决于最接近的行为机制的性质。我们模拟了一类特殊的近似机制，亲社会偏好，并发现这种偏好在一定程度的相关性和一定的生态条件下进化以维持最大的群体利益。因此，我们的模型展示了行为反应和相关性在决定社会进化过程中的基本相互作用。我们还强调了近端机制的关键作用，如亲社会偏好的行为反应的演变，并在促进个性的进化过渡。
An unresolved controversy regarding social behaviors is exemplified when natural selection might lead to behaviors that maximize fitness at the social-group level but are costly at the individual level. Except for the special case of groups of clones, we do not have a general understanding of how and when group-optimal behaviors evolve, especially when the behaviors in question are flexible. To address this question, we develop a general model that integrates behavioral plasticity in social interactions with the action of natural selection in structured populations. We find that group-optimal behaviors can evolve, even without clonal groups, if individuals exhibit appropriate behavioral responses to each other's actions. The evolution of such behavioral responses, in turn, is predicated on the nature of the proximate behavioral mechanisms. We model a particular class of proximate mechanisms, prosocial preferences, and find that such preferences evolve to sustain maximum group benefit under certain levels of relatedness and certain ecological conditions. Thus, our model demonstrates the fundamental interplay between behavioral responses and relatedness in determining the course of social evolution. We also highlight the crucial role of proximate mechanisms such as prosocial preferences in the evolution of behavioral responses and in facilitating evolutionary transitions in individuality.