ICES Journal of Marine Science: Journal du Conseil Advance Access originally published online on March 9, 2007
ICES Journal of Marine Science: Journal du Conseil 2007 64(4):718-722; doi:10.1093/icesjms/fsm011
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When control rules collide: a comparison of fisheries management reference points and IUCN criteria for assessing risk of extinction
Department of Fisheries and Oceans, 200 Kent Street, Ottawa, Ontario, Canada K1A 0E6
Correspondence to J. C. Rice: tel: +1 613 9900288; fax: +1 613 9540807; e-mail: ricej{at}dfo-mpo.gc.ca
Rice, J. C., and Legacè, È. 2007. When control rules collide: a comparison of fisheries management reference points and IUCN criteria for assessing risk of extinction. – ICES Journal of Marine Science, 64: 718–722.The quantitative criteria used by the International Union for the Conservation of Nature (IUCN) to assess risk-of-extinction are compared with reference points used by ICES and other fisheries organizations for advising on fisheries management. Criteria based on numbers of individuals and geographic range appear to be in harmony with limit reference points and control rules used in fisheries management, with reference points indicating that fisheries should be closed well before there is any risk of extinction. However, there is huge potential for conflict between fisheries and risk-of-extinction approaches when considering the extent of population declines. Of 89 species examined, the decline criterion suggested a serious risk-of-extinction in 87%, whereas most of the stocks were still within a zone that allowed fisheries management reference points to indicate that exploitation could continue. Much of the conflict seems rooted in different types of tolerance to risk between the two disciplines. The conservation-biology community acknowledges a high tolerance for "false alarms", to keep the probability of a "miss" very low, whereas tolerance in fisheries management is comparable for both types of error.
Keywords: fisheries, harvest control rules, reference points, risk of extinction, risk tolerance
Received 17 July 2006; accepted 19 December 2006; advance access publication 9 March 2007.