Figure 6.

Mitochondrial protein sequence variation within and among northern (Maine and Maryland fresh-water) and Georgia populations. Blue hatch bars represent synonymous mutations that are variable within population (Variable-S), blue solid bars represent synonymous mutations that are fixed between populations (Fixed-S), red hatch bars represent amino acid replacement mutations that are variable within population (Variable-R), and red solid bars represent amino acid replacement mutations that are fixed between populations (Fixed-R).