External Organisations

  • Danish Fishermen's Association, Denmark
  • Cosmos Trawl A/S, Denmark
  • Johann Heinrich von Thünen-Institute, Germany

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The aim of the project was to develop and test a selective topless trawl to improve selectivity of cod in the demersal mixed species fishery in the northern North Sea.

The design idea was based on utilizing behavioral differences between the species, specifically that most fish stay low in the trawl, and that gadoids, like cod, raise further aft in the tapered section of the gear and can escape above the cut-back headline. An improved species selectivity of cod in the North Sea can allow and economically feasible mixed fishery without further exhausting the cod stocks.

In addition to the topless design, a SELTRA sorting box was installed in codend to compare the selective effect between a relatively large design modification in the forward part of the trawl with a relative small change in codend where the behavioral differences between species is less expressed.

The project is coordinated by DTU Aqua.


  • Research area: Fisheries Technology
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ID: 2287043