Relative population size, cooperation pressure and strategy correlation in two-population evolutionary dynamics

Relative population size, co-operation pressure and strategy correlation in two-population evolutionary dynamics

We study the coupled dynamics of two populations of random replicators by means of statistical mechanics methods, and focus on the effects of relative population size, strategy correlations and heterogeneities in the respective co-operation pressures. To this end we generalise existing path-integral approaches to replicator systems with random asymmetric couplings. This technique allows one to ...

Eco-evolutionary dynamics: fluctuations in population growth rate reduce effective population size in chinook salmon.

We empirically assess the relationship between population growth rate (lambda, a parameter central to ecology) and effective population size (N(e), a key parameter in evolutionary biology). Recent theoretical and numerical studies indicate that in semelparous species with variable age at maturity (such as Pacific salmon, many monocarpic plants, and various other species), differences in mean re...

Population Games And Evolutionary Dynamics

The Population Dynamics of Conflict and Cooperation

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Evolutionary games and population dynamics: maintenance of cooperation in public goods games.

The emergence and abundance of cooperation in nature poses a tenacious and challenging puzzle to evolutionary biology. Cooperative behaviour seems to contradict Darwinian evolution because altruistic individuals increase the fitness of other members of the population at a cost to themselves. Thus, in the absence of supporting mechanisms, cooperation should decrease and vanish, as predicted by c...