Fig. 1
From: Investigating the frequency of triploid Atlantic salmon in wild Norwegian and Russian populations
Map of 80 rivers in this study. Rivers are marked with black dots. The river Vikja, where a triploid individual was identified, is marked with a red square. Remaining named rivers, marked with blue squares, were those where trisomic individuals were discovered. The map was based on data from the United States National Imagery and Mapping Agency (NIMA) (http://gis-lab.info/qa/vmap0-eng.html) released into the public domain