© 2004 by ICES/CIEM International Council for the Exploration of the Sea/Conseil International pour l'Exploration de la Mer
From single-species advice to mixed-species management: taking the next step
a Danish Institute for Fishery Research, Department of Marine Fisheries Charlottenlund Slot, DK-2920 Charlottenlund, Denmark
b European Commission, Directorate-General Fisheries Rue de la Loi 200, B-1049 Bruxelles, Belgium
*Correspondence to S. A. Reeves: tel: +45 3396 3467; fax: +45 3396 3333. e-mail: sar{at}dfu.min.dk.
Fishery management advice has traditionally been given on a stock-by-stock basis. Recent problems in implementing this advice, particularly for the demersal fisheries of the North Sea, have highlighted the limitations of the approach. In the long term, it would be desirable to give advice that accounts for mixed-fishery effects, but in the short term there is a need for approaches to resolve the conflicting management advice for different species within the same fishery, and to generate catch or effort advice that accounts for the mixed-species nature of the fishery. This paper documents a recent approach used to address these problems. The approach takes the single-species advice for each species in the fishery as a starting point, then attempts to resolve it into consistent catch or effort advice using fleet-disaggregated catch forecasts in combination with explicitly stated management priorities for each stock. Results are presented for the groundfish fisheries of the North Sea, and these show that the development of such approaches will also require development of the ways in which catch data are collected and compiled.
Keywords: mixed fisheries, North Sea groundfish, technical interactions
Received 16 December 2003; accepted 19 August 2004.
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