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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 are also larger and less colorful than rainbow trout. Steelhead can weigh up to 55 lb (25 kg) and reach 45 in (110 cm) in length. They can live up to 11 years and spawn multiple times. [4] The body of the steelhead trout is silvery and streamlined with a rounder head. This silver color and round head is what gives the steelhead its ...
The Sportsman Gazetteer in 1877 touted Stevens Creek as a trout fishing destination. [13] Six physical specimens were collected in 1893 by Stanford Biology Professor W. W. Thoburn and are in the California Academy of Sciences collection. [14] In 1898 John Otterbein Snyder collected steelhead trout specimens in Stevens Creek. [15]
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A 1952 California Department of Fish and Game document stated that substantial steelhead runs had not been seen in Los Gatos Creek since 1937, when agricultural pumps lowered the water table throughout the Santa Clara Valley and dewatered the lower reach. However, Central California Coast steelhead/rainbow trout populations remain in the ...
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.
The San Gabriel River historically supported large populations of native fish, including the largest runs of steelhead in Southern California. [43] Steelhead once migrated over 60 miles (97 km) upriver from the Pacific Ocean to spawn, and it was known as one of the "best steelhead fishing rivers in the state". [44] Irrigation development that ...
The Russian River is the largest river in the Central California Coast steelhead trout (Oncorhynchus mykiss) distinct population segment. Natural waterfalls and the two major dams, Warm Springs (built in 1982) and Coyote (built in 1959), have isolated anadromous steelhead from its non-oceangoing rainbow trout form above the impassable barriers ...