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Dungeness Crab Pot Survey and Spatial Monitoring of Sea Otter Bycatch in Ugak Bay, the Trinity Islands, and Alitak Bay in the Kodiak Area, 2014

Carrie L. WortonPhilip TschersichRob BaerKelly NesvacilVerena A. Gill

出版	Alaska Department of Fish and Game, Division of Sport Fish, Research and Technical Services, 2016
URL	http://books.google.com.hk/books?id=lkQSDAEACAAJ&hl=&source=gbs_api

註釋Alaska Department of Fish and Game (ADF & G) conducted a pot survey for Dungeness crab Metacarcinus magister in the Kodiak Area during August - September 2014 and collaborated with U.S. Fish and Wildlife Service (USFWS) to evaluate sea otter Enthydra lutris kenyoni bycatch in the Kodiak Area Dungeness crab fishery by concurrently performing transect surveys for sea otters and monitoring their presence and interaction with survey pot gear. A total of 650 pot lifts were performed using commercial Dungeness crab pots fished in 3 areas important for the Kodiak Area commercial Dungeness crab fishery: Ugak Bay (300 pot lifts), Alitak Bay (250 pot lifts), and the Trinity Islands (100 pot lifts). One-half of the pots fished in each area were fished with the escape rings closed. A total of 3,272 Dungeness crab were captured during the pot survey. Catch per pot lift (CPUE) of sublegal males and females by pots with closed escape rings was significantly (P = 0.004) higher than by pots with open escape rings; the effect of escape ring configuration on CPUE of legal males was not significant (P = 0.337). The CPUE of each sex-size class varied significantly (P