Figure 4 The distributions of genetic distances within and
among species overlap. (a) Distribution of genetic distances at
different taxonomic levels in the shearwaters (upper panel: within
species, middle panel: among species and lower panel: among genera)
according to current taxonomy. Vertical bars show proposed orientative
limits to assist visualisation across panels for values within
subspecies, among subspecies, among species and among genera from left
to right. (b) Zoom-in of the distributions of genetic distances within
and among species. Comparisons between P. mauretanicus andP. yelkouan and between A. carneipes and A.
creatopus fall in the within subspecies range, and comparisons betweenP. baroli and P. boydi and between the three AtlanticCalonectris species fall in the among subspecies range.
Table 1 Comparison of models of ancestral range estimation for
the shearwaters. Models with and without the founder event parameter (j)
are shown separately and for each case the model with the highest AICc
weight is shown in bold.