Fig. 5
From: Rapid evolution of virulence leading to host extinction under host-parasite coevolution
PIP ‘Runaway virulence’, pairwise invasion plot of virulence mutants with differing resident alleles in a case where spore production is proportional to virulence: z = B(v + d). The Grey area represents values of invader fitness r > 0. This fitness becomes positive for all mutants with higher virulence than the resident virulence. The same parameters were used as in Fig. 4: β = 0.00083; m = 0.03; u = 0.07; C = 100; l = 0.33; d = 0.03; k1 = 0.0075; k2 = 0.0075; x = 0.15; B = 750 000