Figure 2: The evolutionarily stable frequency of mimicry is a
declining function of disease prevalence. As the frequency of
disease p increases, the frequency of mimicry maintained in the
population x decreases. Lines show solutions for different values
of the parameters δ, the reduction in reproductive fitness due to
mimicry, and β, the reduction in competition costs due to mimicry. The
base case (δ=0.1, β=0.3) is shown in black; blue lines show the effect
of decreasing δ (to 0.05 and 0.01), and red lines show the effect of
decreasing β (to 0.2 and 0.15). For all cases, r=c= 1.