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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 .
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.
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 ocean trout. Steelhead are raised in many countries throughout the world. Since the 1950s, production has grown exponentially, particularly in Europe and recently in Chile.
Salmonidae (/ s æ l ˈ m ɒ n ɪ d iː /, lit. ' salmon-like ') is a family of ray-finned fish that constitutes the only currently extant family in the order Salmoniformes (/ s æ l ˈ m ɒ n ɪ f ɔːr m iː z /, lit. "salmon-shaped"), consisting of 11 extant genera and over 200 species collectively known as "salmonids" or "salmonoids".
Southern California Steelhead depend on rain fed streams for their survival, as well as lagoon/estuary type systems that is typical for some Southern Steelhead. [16] Spawning cycles are not fully understood, and many fish will not return to streams for over five years, while some will return after only one year in an attempt to successfully spawn.
"Wild salmon provides a ton (1570 mg in a 3-ounce serving) of omega-3s ... If you’re looking for the protective benefits of omega-3 for heart and brain health, salmon is the clear winner," says ...
The rainbow trout (Oncorhynchus mykiss) is a species of trout native to cold-water tributaries of the Pacific Ocean in North America and Asia. The steelhead (sometimes called steelhead trout) is an anadromous (sea-run) form of the coastal rainbow trout (O. m. irideus) or Columbia River redband trout (O. m. gairdneri) that usually returns to freshwater to spawn after living two to three years ...
But wild-caught salmon tends to be slightly higher in protein and omega-3 fatty acids, whereas Atlantic salmon is higher in fat and calories, says registered dietitian Frances Largeman-Roth.