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On the survival of plaice and sole discards in the otter trawl and beam trawl fisheries in the North Sea
Van Beek, F.A.; van Leeuwen, P.I.; Rijnsdorp, A.D. (1989). On the survival of plaice and sole discards in the otter trawl and beam trawl fisheries in the North Sea. CM Documents - ICES, C.M. 1989(G:46). International Council for the Exploration of the Sea: Copenhagen. 6 + tables + figures pp.
Part of: ICES CM Documents - ICES. ICES: Copenhagen. ISSN 1015-4744

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Keywords
    Escapement
    Gear selectivity > Mesh selectivity
    Nets > Fishing gear > Fishing nets > Trawl nets > Bottom trawls
    Survival
    Pleuronectes platessa Linnaeus, 1758 [WoRMS]; Solea solea (Linnaeus, 1758) [WoRMS]
    Marine/Coastal

Authors  Top 
  • Van Beek, F.A.
  • van Leeuwen, P.I.
  • Rijnsdorp, A.D., more

Abstract
    This paper summarizes the results of survival experiments with plaice and sole discards caught by commercial beam trawl vessels and a research vessel fishing with an otter trawl, and with soles that escaped through the meshes in covered cod-end experiments. In the commercial beam trawl fishery the survival of both plaice and sole discards is estimated to be less than 10%. The survival of soles that escape through the meshes is estimated at 60%. The survival of discards is negatively affected by the catching process. During the catching process mortality is caused through the action of the tickler chains and the injuries imposed during the stay in the net. Under present day commercial practice the processing of the catch on deck hardly reduce the survival of discards.

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