title: The evolution of outsider exclusion.
abstract: The rate of migration between different parts of a population can be important in determining evolutionary outcomes. This paper presents a mathematical model in which some individuals act to exclude immigrants from their group. It is shown that outsider exclusion can be favoured by evolution, even when outsider excluders incur a large cost. In addition, it is shown that the evolutionary mechanism which causes increases in the frequency of outsider excluders is a form of kin selection or group selection. A second model shows that a similar mechanisms can act to favour the evolution of reluctance to mate with immigrants.
authors.affiliation: Department of Zoology, University of Oxford, U.K.
authors.forename: J R
authors.initials: JR
authors.lastname: Peck
mesh_terms: D000818:Animals; D005075:Biological Evolution; D004641:Emigration and Immigration; D008954:Models, Biological; D011157:Population Dynamics; D012641:Selection, Genetic