Comparisons of regression models testing the effects of body size (snout-vent length = SVL), climatic component 1 (CC1) and climatic component 2 (CC2) on clutch size.

Note. Akaike Information Criterion (AIC; smaller is better) is computed as (2 * ln maximum likelihood) (2 * no. parameters). d is the restricted maximum likelihood estimate of the Ornstein-Uhlenbeck (OU) transformation parameter. Three linear regression models are compared: ordinary (nonphylogenetic) least squares (OLS), phylogenetic generalized least squares (PGLS), and regression in which the residual variation is modeled as an OU process (RegOU) along the specified phylogenetic tree. *P<0.01. †Model with best fit by smaller-is-better AIC criterion. §Model with best fit by smaller-is-better AICc criterion.