Fig. 4

Survivorship curves of sympatric and allopatric hosts when infected with the four coevolving pathogens, (B1Pe, B2Pe, B3Pe and B4Pe). Data for each coevolving pathogen is plotted in separate graphs with (a), (b), (c) and (d) representing B1Pe (coevolving pathogen for Coev 1 host), B2Pe (coevolving pathogen for Coev 2 host), B3Pe (coevolving pathogen for Coev 3 host) and B4Pe (coevolving pathogen for Coev 4 host), respectively. Within each graph, the left panel represents survivorship of all four female hosts against each one of the coevolving pathogens, while the right panel represents survivorship of male hosts against each one of the coevolving pathogens. Black, red, blue and orange colours represent survivorship of flies from Coev 1, Coev 2, Coev 3 and Coev 4 populations, respectively