The mean fitness of populations with different sizes.

<p>Blue circles, solid lines, <i>h</i> = 0.2; purple squares, dashed lines, <i>h</i> = 0.5; red diamonds, solid lines, <i>h</i> = 0.8. The mean fitness, <i>W</i>, of each population as a function of population size <i>N</i>. (a) Sexual population with only segregation and mutations were exclusively deleterious. <i>U</i>_<i>D</i> = 0.2, <i>s</i>_<i>D</i> = 0.05. (b) Sexual population with only segregation and mutations were exclusively beneficial. <i>U</i>_<i>B</i> = 0.002, <i>s</i>_<i>B</i> = 0.02. (c) Sexual population with both segregation and recombination (<i>L</i> = 0.01). Mutations were exclusively deleterious. <i>U</i>_<i>D</i> = 0.2, <i>s</i>_<i>D</i> = 0.05. (d) Sexual population with both segregation and recombination (<i>L</i> = 0.01). Mutations were exclusively beneficial. <i>U</i>_<i>B</i> = 0.002, <i>s</i>_<i>B</i> = 0.02.