AIC model selection results, with the different models sorted from best to worse fit.

The term of interest in testing for divergent selection is the Species*Host interaction. For survival, the interaction between Species and Host was significant in the best fit AIC model (F1,87 = 4.27, p = 0.042), and significant or marginally insignificant in other models (full factorial model, F1,29 = 3.03, p = 0.09; second and third best models picked by AIC that included the interaction, F1,58 = 3.72, p = 0.06, F1,58 = 4.04, p = 0.049, respectively). For fecundity, the interaction was significant in the best AIC model (F1,120 = 11.14, p = 0.001), and in other models (p<0.01 for interaction terms in second and third best AIC models, and in a full factorial model).