Sampling sites along altitudinal transects replicated in the Alpine section of three major European drainages. Major drainages are indicated by different shading (medium grey=Rhine; light grey=Po; hatched=Rhone; dark grey=Danube) and river systems within drainages are labelled in italics. Different symbols indicate different altitudinal zones: squares < 500m, circles = 500-1000m, triangles >1000m above sea level. Inset table: Native and current distribution of five major evolutionary trout lineages (based on Largiadèr & Scholl 1995, 1996) corresponding to different haplogroups of Bernatchez (2001) and species (in parentheses) of Kottelat & Freyhof (2007): AT=Atlantic (S. trutta), ME=Mediterranean (S. rhodanensis), AD=Adriatic (S. cenerinus), MA=marble trout (S. marmorata), DA=Danubian (S. labrax).
Keller et al. BMC Evolutionary Biology 2012 12:210 doi:10.1186/1471-2148-12-210