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There are currently 15 DPS for steelhead (Oncorhynchus mykiss) and 31 evolutionarily significant units (ESU) for five species of Pacific salmon Oncorhynchus. The boundaries of these areas are used to determine whether specific populations of a species should be designated threatened or endangered species under the Endangered Species Act.
The coho salmon (Oncorhynchus kisutch; Karuk: achvuun [1]) is a species of anadromous fish in the salmon family and one of the five Pacific salmon species. Coho salmon are also known as silver salmon (or "silvers") and is often sold as medium red salmon. [2] The scientific species name is based on the Russian common name kizhuch (кижуч).
In 1989, steelhead were reclassified into the Pacific trout as Oncorhynchus mykiss from the former binominals of Salmo gairdneri (Columbia River redband trout) and S. irideus (coastal rainbow trout). Steelhead are an anadromous form of rainbow trout that migrate between lakes and rivers and the ocean, and are also known as steelhead salmon or ...
Coho salmon numbers have exploded in the Upper Willamette Basin to the delight of anglers and confusion of biologists.
One difficult question for state fish biologists is whether coho might be bad for native salmon and steelhead. They are technically an invasive species, former ODFW deputy inland fish chief Bruce ...
Oncorhynchus is a genus of ray-finned fish in the subfamily Salmoninae of the family Salmonidae, native to coldwater tributaries of the North Pacific basin. The genus contains twelve extant species, namely six species of Pacific salmon and six species of Pacific trout, all of which are migratory (either anadromous or potamodromous) mid-level predatory fish that display natal homing and ...
The steelhead is a rainbow trout that — unlike its freshwater little brother — grows up in the ocean. And it grows up really big, to 2 or 3 feet. And it grows up really big, to 2 or 3 feet ...
Steelhead in 1924 illustration using the original taxonomic name, Salmo gairdneri The freshwater form of the steelhead is the rainbow trout (Oncorhynchus mykiss).The difference between these forms of the species is that steelhead migrate to the ocean and return to freshwater tributaries to spawn, whereas non-anadromous rainbow trout do not leave freshwater.