Model selection results for evaluating the hypothesised determinants of food chain length.

AICc is Akaike's Information Criterion corrected for small sample size, Δi is the AICc difference between a given model and that with the lowest AICc value, and wi is the Akaike weight. The evidence ratio is the relative weight compared to the top model. R2 is the coefficient of determination, and the p-value is the significance of the proportion of variation explained by each determinant as assessed by marginal permutation tests.