Historical demographic analyses.

<p>(A) Mismatch distribution computed using the software Arlequin 3.1. Histograms show the observed distribution; lines show the expected distribution under a model of sudden population expansion. (B) Bayesian Skyline Plot, constructed using the software beast 1.6.1. Population size (<i>y</i>-axis) is measured as the product of effective population size per generation length (<i>N</i>_eτ). The solid line is the median estimate, and the grey areas show the 95% Highest Posterior Density (HPD) limits. Time (<b><i>x</i></b> axis) is expressed in years before present (BP).