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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.
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 ...
The Lake Washington watershed steelhead runs were placed in a vulnerable position when the locks were completed, as fish in each run were bottlenecked by the fish ladder. . Additionally, the fish would spend several days resting in the estuarine area directly below the locks while undergoing the metabolic changes needed for the shift from salt to fresh water
Endangered and Threatened Species DPS and ESU U.S. range for Steelhead and Salmon. The National Oceanic and Atmospheric Administration, in cooperation with the U.S. Fish and Wildlife Service and Environmental Protection Agency, groups steelhead and salmon into distinct population segments (DPS).
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 ...
Redband trout populations have been declining across its range as a result of habitat changes or destruction, the introduction of alien and hatchery-raised fish species, and seasonal drought. However, as of 2000, the population of Great Basin redband trout was not a candidate for listing as threatened or endangered by the standards established ...
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