Does life history shape sexual size dimorphism in anurans? A comparative analysis.

ABSTRACT:

Background

The evolution of sexual size dimorphism (SSD) is likely constrained by life history. Using phylogenetic comparative methods, we examined correlations between SSD among anurans and their life history traits, including egg size, clutch size, mating combat, and parental care behaviour. We used sexual dimorphism index (SDI = Body-size(female) /Body-size(male) -1) as the measurement for SSD. Body size, life history and phylogenetic data were collected from published literature. Data were analysed at two levels: all anuran species and within individual families.

Results

Female-biased SSD is the predominant form in anurans. SSD decreases along with the body size increase, following the prediction of Rensch's rule, but the magnitude of decrease is very small. More importa

SUBMITTER: Han X 

PROVIDER: S-EPMC3570426 | biostudies-literature | 2013 Jan

REPOSITORIES: biostudies-literature