title: Evolution of altruism in stepping-stone populations with overlapping generations.
abstract: We study the evolution of altruism in one- and two-dimensional stepping-stone populations with discrete overlapping generations. We find that increasing survival probability facilitates the evolution of altruism, in agreement with recent results for a patch-structured population. We allow the altruistic behaviour to affect either fecundity or survival probability. In the first case, altruism is favoured compared to a randomly interacting population, but in the second case, altruism is less likely to evolve. We consider the iterated prisoner's dilemma as a description of an altruistic interaction and compare our results with recent simulations of lattice populations.
authors.affiliation: Department of Mathematics and Statistics, Queen's University, Kingston, Ontario, K7L 3N6, Canada. ajirwin@rci.rutgers.edu
authors.forename: A J
authors.initials: AJ
authors.lastname: Irwin
authors.forename: P D
authors.initials: PD
authors.lastname: Taylor
mesh_terms: D000533:Altruism; D005075:Biological Evolution; D003299:Cooperative Behavior; D005298:Fertility / Q000235:genetics; D006801:Humans; D016901:Intergenerational Relations; D008957:Models, Genetic; D015233:Models, Statistical; D011157:Population Dynamics; D011336:Probability; D016019:Survival Analysis