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Cite as: Mangel M, B. Marinovic, C. Pomeroy, D.A. Croll. 2001. Requiem for Ricker: Unpacking MSY. Marine Research. In Press.
Marc Mangel 1,2 , Baldo Marinovic 2 , Caroline Pomeroy 2 and Donald Croll 2,3 1) Department of Environmental Studies, 2) Institute of Marine Sciences, and 3) Department of Ecology and Evolutionary Biology, University of California, Santa Cruz, CA 95064
Much like the Cornucopia myth of the 19th and early 20th centuries, MSY as a management tool simply won't go away, regardless of evidence that managing for MSY has not been effective. Consequently, we investigate Ricker's definition of MSY, focusing on words such as average catch, continuously taken, and existing environmental conditions. To do this, we develop a model for the squid fishery in California; this is probably the last great open access fishery on the west coast of the US. By constructing the model in a step-wise fashion, one is able to illustrate particular points. Insight from the model leads to a deeper understanding of the definition of MSY, particularly that different methods of averaging and explicitly including risk to the stock in MSY may allow MSY to be used in the context of precautionary fishery management. Finally, we summarize results from the Third Mote Symposium that also shed light on this issue. Click here to view entire paper
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