Fig. 2

Neighbour-joining tree based on the complete mitochondrial D-loop sequence of Iberian Peninsula Salmo trutta under the HKY85 model of evolution (transition:transversion ratio: 2.39). Numbers on branches represent the bootstrap values obtained for 100 replications corresponding to minimum evolution and maximum parsimony, and puzzling steps for 1000 replications corresponding to the maximum likelihood method. Support values under 50% are not represented. Abbreviations correspond to NA, North Atlantic; SA, South Atlantic; DU, Duero; ME, Mediterranean; AN, Andalusian.