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Report of a study to determine the degree to which crude oil and other hydrocarbons would affect fishes (coho salmon (Oncorhynchus kisutch) and sockeye salmon (Oncorhyunchus nerka)) and the mechanisms by which the effects were brought about. Such information becomes essential as the threat of oil pollution increases with the discovery and transport of oil from Alaskas North Slope and Prudhoe Bay.
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Stomach samples of king salmon (Oncorhynchus tshawytscha) and coho salmon (Oncorhynchus kisutch) were collected from the commercial troll fishery of Southeastern Alaska in 1957 and 1958. Herring accounted for the largest percentage of the five organisms eaten most frequently by both species of salmon. The diet of coho salmon was found to be much more varied than that of king salmon. Differences in the salmons' diet between four geographic areas of Southeastern Alaska and differences occurring in relation to the size of the salmon were analyzed and described.