Median-joining network of brown trout mtDNA CR haplotypes. Previously described haplotypes that were not detected in this study are represented by grey circles of the same size. For haplotypes detected in the Panjica hatchery broodstock, the size of the cirlces reflects the frequency of each haplotype, and they are color coded (red – DA, blue – AT lineage). Mutations are represented by slashes crossed with the network branches. The black circle indicates an extinct, ancestral or unsampled haplotype.