Additional file 1.

Mean body size in each sex, mean egg size, mean clutch size, mating combat, and parental care behavior in 688 anuran species. SDI = sexual dimorphism index [(female body size/male body size) – 1]. * R = range body size data, M = mean body size data. $ The presence of a trait is coded as “1”, and the absence of a trait is coded as “0”; missing data are represented by “-”.

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