Figure 3 : Survival of bowhead whale lineages during the Pleistocene–Holocene transition.

From: Ancient DNA reveals that bowhead whale lineages survived Late Pleistocene climate change and habitat shifts

Figure 3

A haplotype network illustrates the survival of the lineages of bowhead whales found south of 59°N during the Late Pleistocene through to the early Holocene, when bowhead whales were found in their current Arctic range. The haplotype network is stratified into two time periods: the top network (blue) indicates data from the Late Pleistocene and the lower network (green) indicates data from the Early Holocene22. Vertical lines link haplotypes found in both time periods. Circles are proportional to haplotype frequency in that time period. White circles indicate haplotypes found in one time period, but not the other; black circles indicate inferred haplotypes.