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Marine Mammal Interactions With The Salmon Drift Gillnet Fishery On The Copper River Delta, Alaska, 1988-1989
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1990
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By Wynne, Kate
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Series: AK-SG ; 90-05
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Description:Coastal pinnipeds have been scavenging netted salmon and damaging fishermen's gillnets for decades in Alaska. Since 1972, when federal protection was granted for marine mammals, their numbers have increased substantially. In 1988 nearly 1% of the ex-vessel dollar value of landed salmon was lost due to conflicts involving northern sea lions, harbor seals, sea otters, and cetaceans in Copper River Delta fisheries. Individual fishermen are aggressively protective of their gear and catch, despite laws that prevent killing marine mammals. This study is part of a much-needed effort to assess the severity of the marine mammal-fishery problem, and find solutions. Increased sea otter/fishery conflicts warrant that fishermen be trained in live-release techniques for removing sea otters from fishing gear. On the positive side, drift net-related incidental killings of pinnipeds decreased between 1978 and 1988. The development of nonlethal deterrents, such as loud noises, is recommended to scare hungry mammals from the gear. The use of at-sea observers has encouraged cooperation with fishermen, and should be continued.
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Sea Grant Document Number:AKU-T-90-002
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Rights Information:Public Domain
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Compliance:Library
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