Fishery Responses to Changes in Oceanic Climates: The Case of the Oregon Ocean Shrimp Fishery Public Deposited

http://ir.library.oregonstate.edu/concern/conference_proceedings_or_journals/d217qq555

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  • Oregon ocean shrimp annual harvest relies on the successful recruitment and growth of age one shrimp. Changes in oceanic conditions appear to have major impacts on recruitment, spatial abundance and growth rates. Successful recruitment has been identified with the timing and strength of the spring transition generating oceanic conditions favorable for advection of shrimp to settling grounds. Similarly, changes in individual shrimp growth rates can be traced to decadal variability in Pacific environmental indicators. In turn, this environmental variability affects shrimp value as processors and markets seek larger and uniform shrimp. This paper examines how variable recruitment subject to environmental forcing influences the ocean shrimp, Pandalus jordani, fishery. Given the historical importance of this fishery to Oregon, opportunities to improve harvest value despite abundance variability are explored through alternative management strategies focusing on efficiency and stability. An optimization model analyses harvest strategies to achieve alternative sets of fishery objectives using a 22-year environmentally driven recruitment index, a 22-year commercial growth series, an ex-vessel size-price relationship, and fishery survey information. Environmentally driven and fishery driven stock recruitment are incorporated into the model to determine optimal dynamic seasonal and annual harvest patterns. Implications for long-term management of the fishery are discussed.
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  • Gallagher, Charmaine Marie, Gil Sylvia and Robert W. Hannah. 2006. Fishery Responses to Changes in Oceanic Climates: The Case of the Oregon Ocean Shrimp Fishery. In: Proceedings of the Thirteenth Biennial Conference of the International Institute of Fisheries Economics & Trade, July 11-14, 2006, Portsmouth, UK: Rebuilding Fisheries in an Uncertain Environment. Compiled by Ann L. Shriver. International Institute of Fisheries Economics & Trade, Corvallis, Oregon, USA, 2006. CD ROM. ISBN 0-9763432-3-1
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  • description.provenance : Made available in DSpace on 2013-10-29T17:30:56Z (GMT). No. of bitstreams: 1 289.pdf: 194029 bytes, checksum: 9974cd836214a0f212fbca477dcb082f (MD5) Previous issue date: 2006-11

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