Adaptive Dynamics studies respectively strategies in different population models.
Population models are almost always nonlinear.
Therefore their analysis is more complicated, but therefore also more interesting than the analysis of the linear games. As an example we will study the evolution of migration in a metapopulation. A metapopulation is a collection of local populations living in different habitat patches. The strength of migration is described by a number p, which is the probability that an individual migrates out of its habitat patch during one time step. This number p is the strategy.