Figure 1. The percentage of Tephritis conura adapted to Cirsium oleraceum (N = 28, grey bars) and T. conura adapted to C. heterophyllum flies (N = 45, black bars) accepting C. oleraceum inflorescences for oviposition and producing offspring depicted as a function of proceeding life-stage. Note that survival decreases linearly for T. conura adapted to C. oleraceum and decreases step-wise for T. conura adapted to C. heterophyllum.