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Overlap of North Pacific albatrosses with the U.S. west coastgroundfish and shrimp fisheries Public Deposited

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Abstract
  • We used a combination of seabird data (both fishery-dependent and fishery-independent) and fishing-effort data to evaluate the relative fisheries risk of five west coast groundfish fisheries and oneshrimp fishery to black-footed (Phoebastria nigripes), short-tailed (P. albatrus) and Laysan albatrosses(P. immutabilis). To assess risk, an overlap index was derived as the product of total fishing effort andat-sea survey density of black-footed albatross. This index was used as the primary tool to estimate over-lap with the endangered, relatively rare short-tailed albatross, which show similar habitat utilizationfrom satellite telemetry tracks. Telemetry data indicate Laysan albatross primarily occur offshore beyondobserved fishing effort. Black-footed and short-tailed albatross-fishery overlap was highest at the shelf-break (201–1000 m) north of 36◦N. Overlap and reported albatross mortality indicate that the sablefish(Anoplopoma fimbria) longline and Pacific hake (Merluccius productus) catcher-processor fisheries posethe greatest risk to these species; the near-shore rockfish (Seabastes spp.) longline, pink shrimp (Pandalusjordani) trawl, California halibut (Paralichthys californicus) trawl, and non-hake groundfish trawl fisheriespose relatively little risk. Implementing proven seabird bycatch-reduction measures will likely minimizealbatross mortality in the highest-risk fishery, sablefish longline.
  • Keywords: Demersal longline fisheries, Seabird bycatch, Trawl fisheries, Risk assessment, North Pacific albatrosses
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  • Guy, T., Geernaert, T., Henry, R., Hester, M., Hyrenbach, K., Jahncke, J., . . . Deguchi, T. (2013). Overlap of north pacific albatrosses with the US west coast groundfish and shrimp fisheries. Fisheries Research, 147, 222-234. doi:10.1016/j.fishres.2013.06.009
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  • 147
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  • Funding for analysis and writing of this manuscript was provided by the NOAA Northwest Fisheries Science Center, NMFS Northeast Regional Office, and NOAA Fisheries National Seabird Program, and from Washington Sea Grant, University of Washington. The Pacific States Marine Fisheries Commission and the Oregon State University, Cooperative Institute for Marine Resources Studies provided administrative support for R. Suryan. We are also very grateful to the many sources of funding that supported the collection of data used in our analyses of which there are too many to list here. Please see references of individual datasets for full acknowledgments.
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