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. 2007 Aug 8;2(8):e701. doi: 10.1371/journal.pone.0000701

Figure 5. Thresholds for the spread of the mating preference mutant.

Figure 5

Graph (a): The parameter plane spanned by the preference strength and the CI level consists of two areas. For low levels of CI, P 2 cannot spread no matter how strong the mating preference is. For CI levels above a certain threshold, however, P 2 spreads on the island. Black squares indicate simulation results, gray circles values determined by formula (17). Graph (b): The parameter space spanned by the CI level and the migration rate consists of four areas. First, if l CI<f then mainland and island are uninfected and P 2 cannot spread. Second, if m>mc then both mainland and island are infected and P 2 cannot spread. Third and fourth, if l CI>f and m<mc then P 2 can spread if the CI level is above a threshold but cannot if the CI level is below. Parameters are f = 0.1 in both graphs, m = 0.001, s = 0.1 in (a), and a 2 = 10, s = 1 in (b).