Nerka

• (n.) 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.
Found on http://thinkexist.com/dictionary/meaning/nerka/

Nerka

Ner'ka noun [ Russian niarka , probably from native name.] (Zoology) 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
Found on http://www.encyclo.co.uk/webster/N/15

nerka

sockeye salmon
Found on http://phrontistery.info/n.html
No exact match found