Additional file 4.

Results from simple linear regression analyses on the ‘extended dataset’ using phylogenetic generalized least squares (PGLS) model and phylogenetic independent contrasts (PIC). PIC analyses are conducted at both all-anuran and family levels; outliers, which deviated from the majority of the data points by more than three interquartile ranges from the quartiles, were excluded. All species with relevant data are included in each pairwise correlation analysis. Only correlations with degrees of freedom ≥ 3 are presented. P < 0.10 are in bold. * Dicro = Dicroglossidae; the family has ‘mean’ data only.

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Han and Fu BMC Evolutionary Biology 2013 13:27   doi:10.1186/1471-2148-13-27