Abstract:
Twenty-two steelhead trout (Salmo gairdneri) containing coded wire tags (CWT's) were
captured in gillnets fished by the Oshoro-Maru in the Gulf of Alaska and along 180 during
1982-85. These fish originated from North American streams and hatcheries in British
Columbia, Idaho, and Washington. One fish was age 0.1, 16 were age 1.1 and 5 were age 1.2.
In 1985, 17% of the steelhead caught had missing adipose fins but did not contain tags. This
high proportion of marked hatchery fish and the known fresh water ages of marked fish
indicated that many of the steelhead caught by the Oshoro-Maru and other vessels in the
Northeast Pacific originated from North American hatcheries.
