Multiple regression analyses of the residuals of snout-to-vent-length on the eight ecological factors (PC).

Residuals of snout-to-vent-length (denoted as e in the formulation of methods) express the portion of SVL that was not explained by the unshared variation between ecology and phylogeny. Bold lettering denotes partial correlations significant at P<0.05. Asterisks denote the number of times that a PC was significant when applying the four selection criteria used to add spatial filters. See methods, Tables 2, 3 and Appendix S4 for details. b: denotes standardized regression coefficients.