Summary of variables included in five linear regression models with best fit values (AICc).

Variables, number of parameters in the model (K), Akaike’s Information Criterion adjusted for small sample size (AICc), difference of AICc between a model and the model with the lowest AICc (ΔAICc), and Nagelkerke’s R2 values, are given for each model. See Table 1 for descriptions of environmental variables studied. Summary of variables included in five linear regression models with best fit values (AICc).