Figure 4 .

(A) Mean selection coefficient (solid line and right scale) and standard deviation of selection coefficients (left scale) for different mutation sizes ($\stackrel{-}{r}$). Dotted lines correspond to effective population size N = 10 and dashed lines to N = 100; there are also triangles (N = 1000) and circles (N = 10,000), which are indistinguishable. Lines are superposed for different dimensions (n = 3, n = 30) and different environmental variability and amplitude (fixed and shifting optimum with τ = 10⁴, σ_a = 0.425). (B) Coefficient of variation of selection coefficients for different mean step sizes. N = 1000 (dashed line); N = 10 (dotted line).