Pinniped and seabird predation: implications for recovery of threatened stocks of salmonids in Oregon under the Oregon Plan for Salmon and Watersheds Public Deposited

http://ir.library.oregonstate.edu/concern/technical_reports/j9602070t

This report was written by the Independent Multidisciplinary Science Team of the Oregon Plan for Salmon and Watersheds.

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  • The Independent Multidisciplinary Science Team (IMST) was directed to evaluate the extent of predatory impacts of marine mammals and seabirds on salmonids and to recommend actions to mitigate impacts. IMST focused on the Oregon Department of Fisheries and Wildlife Action Plans because they provide the programmatic direction for the State of Oregon in the context of the Oregon Plan for Salmon and Watersheds (Oregon Plan). Marine mammals and seabirds have been considered detrimental to salmon production for a long time, and extensive control programs are part of the history of salmon management. Unfortunately Oregon have not invested in enough research to accurately define the dimensions of the problem. Uncertainty regarding predators of salmonids by pinnipeds and birds is expressed in five science questions addressed in the report. IMST concludes that California sea lion, Pacific harbor seal, Caspian tern and cormorant populations along the Oregon coast have all increased in recent years, coinciding with historical lows in salmonid abundance. Predation by these species may be a factor in the lack of recoveries of some depressed salmonid stocks but there is no compelling scientific evidence that predation has been a primary cause for recent decline of salmonids. No comprehensive studies have been conducted to evaluate the importance of predation on escapement of wild stocks relative to other factors.
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  • Independent Multidisciplinary Science Team. 1998. Pinniped and Seabird Predation: Implications for Recovery of Threatened Stocks of Salmonids in Oregon Under the Oregon Plan for Salmon and Watersheds. Technical Report 1998-2. Governor's Natural Resources Office. Salem, OR.
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  • description.provenance : Made available in DSpace on 2009-09-08T17:23:14Z (GMT). No. of bitstreams: 1 1998-2.pdf: 93046 bytes, checksum: bd3a0c0314f0d35a34a687203b9504d2 (MD5) Previous issue date: 1998-12-22
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