Source : Webster's Revised Unabridged Dictionary (1913)

Nerka \Ner"ka\, n. [Russ. niarka, prob. fr. native name.]
   (Zo["o]l.)
   The most important salmon of Alaska ({Oncorhinchus nerka}),
   ascending in spring most rivers and lakes from Alaska to
   Oregon, Washington, and Idaho; -- called also {red salmon},
   {redfish}, {blueback}, and {sawqui}.