Test and demonstration of a selective topless trawl in the North Sea (38699-2)

Project Details


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 and funded by the Danish Ministry of Food, Agriculture and Fisheries and the European Fisheries Fund (EFF).

Research area: Fisheries Technology
Effective start/end date01/01/200931/12/2011

Collaborative partners

  • Technical University of Denmark (lead)
  • Cosmos Trawl A/S (Project partner)
  • Johann Heinrich von Thunen Institute (Project partner)
  • Danish Fishermen's Association (Project partner)


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