Fig. 2From: Sex determination systems in reptiles are related to ambient temperature but not to the level of climatic fluctuationClimate and climatic fluctuations in reptiles with temperature-dependent and genotypic sex determination systems (n = 213 species). Boxplots representing (a) seasonality in temperature, and b interannual fluctuation in temperature, and c ambient temperatures for species with either TSD or GSD systems, based on annual (annual) and breeding seasons (breed) data. d-f Similar to a-c) but for precipitation data. Significant differences (Phylogenetic Generalized Least Squares test): exact P values are indicated. Error bars, maximum and minimum values, excluding outliers. See Additional file 2: Tables S1 and S2 for details. Temperature is given in Celsius. Precipitation refers to ml units of rainBack to article page