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It extends along the Pacific coast of North America from the Eel River in northern California (De Witt 1954) to the Prince William Sound area of southeast Alaska, bounded by Gore Point on the Kenai Peninsula (Sumner 1948, 1972; De Witt 1954; Scott and Crossman 1973; Behnke 1992).
The eastern range of the subspecies rarely extends farther inland than 160 km and is usually less than 100 km.
The eastern range appears to be bounded by the Cascade Mountain Range in California, Oregon, and Washington and by the Coast Range in British Columbia and southeast Alaska (Fig. As pointed out by Trotter (1989) and Trotter et al.
Resident, non-anadromous fish tend to be darker, with a "coppery or brassy" sheen (Behnke 1992). Subspecies of cutthroat trout and their federal and state protection status (modified from Allendorf and Leary 1988).
The eight major subspecies are endemic to large geographical areas (Behnke 1979).
While most anadromous cutthroat trout enter seawater as 2- or 3- year-olds, some may remain in fresh water for up to 5 years before entering the sea (Sumner 1972, Giger 1972).
Other cutthroat trout may never outmigrate at all, but remain as residents of small headwater tributaries.
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Resident fish in the Umpqua River Basin Resident cutthroat trout have been observed in the upper Umpqua River drainage (Roth 1937, FCO and OSGC 1946 , ODFW 1993a), but, until recently, little specific information has been available on them.
In 1992, Waters (1993) radio-tagged what he believed were 25 "resident" cutthroat trout, 154 - 234 mm in length (Table 3), in three tributaries of Rock Creek in the North Umpqua River drainage (Fig.
Unlike other anadromous salmonids, sea-run cutthroat trout do not over-winter in the ocean and only rarely make long extended migrations across large bodies of water.
They migrate in the nearshore marine habitat and usually remain within 10 km of land (Sumner 1972, Giger 1972, Jones 1976, Johnston 1981).
Life-History Forms of Coastal Cutthroat Trout The life history of coastal cutthroat trout is probably the most complex and flexible of any Pacific salmonid (Johnston and Mercer 1976; Johnston 1981; Trotter 1987, 1989).