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Extended Bayesian Skyline plots of estimated past population dynamics by Bayesian Monte Carlo simulation of coalescent molecular trees based on mitochondrial DNA data. The y-axis indicates the effective relative number of females, while the x-axis is years (×106) before present. The plot lines are as follows: red, median estimate; blue, mean estimate; green, lower 95% limits; and purple, upper 95% limits. Note differing axis assigned to U.S. Welsh pony.
