Fig. 2.

Demographic history of B. microlepis. a Mismatch distribution. Black columns represent the observed frequency of pairwise differences. Gray lines refer to the expected distribution based on parameter estimates and their 95% confidence limits simulated under a model of population growth. Sum of squared differences (SSD) and raggedness index (rg) and their respective P values are given to describe the fit of the observed mismatch distribution to the expectations based on growth parameter estimates. b GMRF skyride plot of past population size trajectories. The skyride plot shows the product of female effective population size (fN_e) and mutation rate (μ) through time, assuming substitution rates of 5.7 and 3.24% per site per MY (Genner et al., 2007, 2010a; Koblmüller et al., 2009). The thick black line represents the median values; the thin gray lines denote 95% highest posterior density (HPD) intervals