Figure 2.

Rescue probability versus mutation effect size. The probability of evolutionary rescue for the classic, phenotypic FGM (grey lines, equation (3.6)) and for the genotypic model (equation (3.12)) is plotted versus the mutation effect size, σ. We find that the rescue probability is reduced in the genotypic model, decreasing with the number of available mutations, L ($L=15,\hspace{0.17em}10\hspace{0.17em}\mathrm{and}\hspace{0.17em}5$ plotted in green, blue and purple, respectively). Filled circles are simulation results (error bars are similar to or smaller than symbol heights and have been omitted). Other parameters are: N = 5, U = 10⁻³, δ = 0.2, ρ = 1.