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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).
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 ...
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.
Due to the extended periods of drought throughout their range, Southern California steelhead are most commonly seen during periods of increased rainfall, such as El Niño events. [2] Declared federally endangered in 1997, [3] the geographic range of the DPS when first listed extended from the Santa Maria River south to Malibu Creek.
Chinook salmon are known to range as far north as the Mackenzie River and Kugluktuk in the central Canadian arctic, [46] and as far south as the Central Californian Coast. [47] Chum salmon (Oncorhynchus keta) is known as dog salmon or calico salmon in some parts of the US, and as keta in the Russian Far East.
Beginning near Klamath Falls in the Oregon high desert, it flows west through the Cascade Range and Klamath Mountains before reaching the temperate rainforest of California's North Coast, where it empties into the Pacific Ocean. The Klamath River is the third-largest salmon and steelhead producing river on the west coast of the contiguous ...
The Stillaguamish River and its tributaries are known for their salmon runs. Eight salmonid species use the streams for spawning , including Chinook, coho, chum, pink, and sockeye salmon, steelhead trout, sea-run cutthroat, and bull trout.
The Dolly Varden trout (Salvelinus malma) is a species of salmonid ray-finned fish native to cold-water tributaries of the Pacific Ocean in Asia and North America.Despite the name "trout" (which typically refers to freshwater species from the genera Salmo and Oncorhynchus), it belongs to the genus Salvelinus (chars), which includes 51 recognized species, the most prominent being the brook ...