CAN ALTRUISM EVOLVE IN PURELY VISCOUS POPULATIONS

被引:277
作者
WILSON, DS
POLLOCK, GB
DUGATKIN, LA
机构
[1] Department of Biological Sciences, State University of New York, Binghamton, 13902-6000, NY
[2] Department of Zoology, Arizona State University, Tempe, 85287-1501, AZ
[3] School of Biological Sciences, University of Kentucky, Lexington, 40506, KY
关键词
ALTRUISM; SELECTION; INCLUSION FITNESS; GROUP SELECTION; POPULATION VISCOSITY;
D O I
10.1007/BF02270969
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
Limited dispersal is often thought to facilitate the evolution of altruism by increasing the degree of relatedness among interacting individuals. Limited dispersal can have additional effects, however, such as local population regulation, that inhibits the evolution of altruism. Many models of structured populations assume that a viscous stage of the life cycle alternates with a global mixing stage, which allows thc advantages of interactions among close relatives without the disadvantages of local population regulation. Here we analyse a computer simulation model of 'pure' population viscosity, in which offspring are always deposited close to parents and no global mixing stage exists. As expected, limited dispersal generates a high coefficient of relatedness among interacting individuals. Patches of altruists, however, arc unable to 'export' their productivity to other regions of the landscape and are easily invaded by selfish types from neighbouring patches. Unlike models of alternating viscosity, in which high relatedness and local population regulation can be decoupled, these two opposing effects are inextricably linked in purely viscous populations, which therefore are not conducive to the evolution of altruistic traits.
引用
收藏
页码:331 / 341
页数:11
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