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Review article - Peer-reviewed, 2016

Reducing flatfish bycatch in roundfish fisheries

Santos, Juan; Herrmann, Bent; Mieske, Bernd; Stepputtis, Daniel; Krumme, Uwe; Nilsson, Hans


Flatfish bycatch is a concern in many demersal trawl fisheries around the world, especially for fisheries operating under discard-ban regulations. We introduce and assess the performance of FRESWIND (Flatfish Rigid EScape WINDows), a concept for a selection device that reduces flatfish bycatch in roundfish-directed fisheries. The new concept was tested for the first time in the Baltic cod-directed fishery, using a commercial twin trawler. The vessel was rigged with two trawls; one standard trawl gear and one incorporating the experimental FRESWIND. Comparison of the catches from both trawls exhibited up to similar to 68% reduction in flatfish bycatch for the trawl with FRESWIND mounted. In addition, the catch of undersized cod was reduced by similar to 30%, whereas losses of marketable cod were relatively minor (similar to 7%). Further simulations predicted that, in the commercial fishery, a reduction of more than 50% in flatfish bycatch could be achieved if FRESWIND were adopted. Given these promising results, FRESWIND may also provide a method that significantly reduces flatfish bycatch in other fisheries. (C) 2015 Elsevier B.V. All rights reserved.


FRESWIND; Selectivity; Mixed fishery; Flatfish; Roundfish; Contact probability; Discard ban; Choke species; Baltic Sea

Published in

Fisheries Research
2016, Volume: 184, pages: 64-73

    UKÄ Subject classification

    Fish and Aquacultural Science

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