Fig. S5.

The effects of host and parasite genotypes on infection success rates. We observed a marginally nonsignificant interaction (P = 0.09) between host and parasite genotypes on the infection rates among experimentally exposed hosts. Here, we plot the infection rate as a function of host genotype (GOS or ROB) and cestode population. The geographically more distant cestodes, from Jericho Pond on the University of British Columbia campus, trended toward higher infection success in the otherwise more resistant ROB fish, whereas both local cestode populations had somewhat higher success rate in GOS fish. Although no single contrast is significant, the different slopes for Jericho versus Echo or Gosling cestodes generate the marginally nonsignificant interaction.