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In the summer of 1992, about 482,000 sockeye salmon seemed to disappear on their way to the spawning grounds in the Fraser River system... sockeye yield high returns to commercial fishermen — some $250 million annually, half the total value of British Columbia’s commercial salmon fishery.

Peter H. Pearse, Managing Salmon on the Fraser: Report to the Minister of Fisheries and Oceans on the Fraser River Salmon Investigation, November 1992