Fig. 2
From: Specificity of resistance and geographic patterns of virulence in a vertebrate host-parasite system
Sampling sites. Sticklebacks originated from Lake Großer Plöner See, Germany (DE), ~ 25 km from Neustädter Binnenwasser (NST; one of the sampling sites of S. solidus) and Lake Skogseidvatnet, Norway (NO). S. solidus were sampled from nine different locations across Europe and the Pacific (more information in Additional file 1: Table S1). Colors indicate four geographic clusters (pink: Pacific, orange: Atlantic, violet: Baltic, green: European Inland). The map was drawn with the R package maps [77]; colors were chosen from the ColorBrewer palette [76]