Effect of parametrization on dynamic regime for a population in isolation. Here, columns indicate values of γ and rows indicate values of σ. Depending on the combination of β, σ, μ, and γ, a population can exhibit a range of dynamics including steady states for all strains (pink), cyclical or chaotic dynamics for all strains (orange), or partial extinction of some strains (blue). Green cells indicate a numerical failure in integration. All simulations here utilize a two-loci, two-allele strain structure. See \citet{Gupta_1998} for a similar figure for alternative parameterizations.