Comparison between demographic histories. On the left in green is PSMC [13], run on the entire genome for a subset of the data (n = 20).

In blue is our history from the first line of Table 7. On the right in red is the history from Duchen et al. [3] (note the change in the y-axis scale). The difference between our estimates and these previous estimates is likely due in large part to their assumption of a very short (1000 generations) bottleneck. Given this timing constraint, only a very severe bottleneck could fit the data. A more gradual bottleneck seems more realistic, although we do not have a simple explanation for why there was a bottleneck at all.