Figure 3.

Conditional mean fixation time ${\overline{T}}_c$ for moderate selection in static ($•$) and slowly changing environment with selection coefficient $s(t)=\sigma \hspace{0.17em}\text{sin}(\omega t+\theta )$ (diamonds) and $-s(t)$ (squares) for different dominance coefficients and the initial phase $\theta =\pi /4$ (open symbols) and $3\pi /4$ (closed symbols) in a population of size N. The other parameters are $N=2\times {10}^3,N\omega =0.05$ and $\sigma =0.01$. The inset depicts the arrival time of the mutant in all the cases. The data are obtained within the framework of diffusion theory by numerically solving (4)–(7).