Populations of sockeye salmon from the Kvichak River drainage. Location in southwest Alaska appears in rectangle of upper left insert. Numbers correspond to populations within Alagnak (1 - 9) and Kvichak (10 - 31) subdrainages. Population legends--tributaries: squares; mainland beaches: triangles; and island beaches: circles. Grey crosses indicate two waterfalls that may represent velocity barriers for migrating adults.
Gomez-Uchida et al. BMC Evolutionary Biology 2011 11:48 doi:10.1186/1471-2148-11-48