Bayesian skyline plots showing effective female population size.

<p>Effective female population size (<i>N_ef</i>), in thousands, multiplied by mean generation time (<i>T</i>), in years. Heavy line is median and lighter lines are 95% highest posterior density (HPD) limits. <i>N_ef x T</i> plotted on log scale for clarity and truncated to median estimate of tMRCA.