Fig. 8. Maximum likelihood phylogenetic tree estimated from 12S mitochondrial rRNA sequences and the trait values for the final number of fast muscle fibres (FN_max) for the notothenioid fishes studied using Phylip. Values are means ± S.E.M. (number of individuals). The bootstrap support values obtained from the Phylip analysis are shown italicised in parentheses by the nodes (see text for details). The branch lengths and node heights for the tree are given in the Appendix. The size of the fish gives some indication of their relative sizes, but they are not drawn to scale. The locomotory habit of each species is also shown: D, demersal; D/P, demerso-pelagic and P, pelagic. The colours on the right-hand side show the geographical zone of capture for each species: Beagle Channel (green), Shag Rocks, South Georgia (light blue) and Antarctic Peninsula (dark blue). The colours on the left-hand side indicate the current taxonomic families, some of which are not monophyletic.

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