Optimal sustainable exploitation of Nephrops norvegicus in Kattegat and Skagerrak (38909)

Project Details


The scientific advice on management of fisheries is primarily aiming at avoiding overfishing of the fish and shellfish stocks and only to a very limited extend addresses how the utilisation of the resources can be optimised within a sustainable ecosystem framework. An example is the regulation of the demersal trawl fisheries in the Skagerrak and the Kattegat which to protect the cod stock is sub-optimal in relation to the utilisation of the Norway lobster (Nephrops) stocks. The project takes a new approach to the management and aims at optimising the utilisation of Nephrops stocks without compromising the protection of cod.

The Nephrops fishery is one of the economically most important fisheries in Denmark. In the Kattegat and Skagerrak, Nephrops catches accounted in 2010 for 53 % and 25 %of the total value of fish and shellfish, respectively, landed by Danish fishermen. Cod is taken as by-catch in the Nephrops fishery and it has been necessary to introduce measures to limit the by-catches of cod, which is currently below agreed reference points for stock size. These measures have had a negative impact on Nephrops catches.

The project addressed four objectives:
1. development of advice on the fishing mortality for the Nephrops stocks, which is consistent with maximum sustainable yield.
2. mapping of the distribution of Nephrops in Skagerrak and Kattegat.
3. development of a new trawl concept optimising the catchability on Nephrops while limiting the by-catches of cod and impact on the sea bed.
4. evaluating alternative fishing methods for Nephrops including fishing with pots.

The project was coordinated by DTU Aqua and funded by the Danish Ministry of Food, Agriculture and Fisheries through the Green Development and Demonstration Program (GUDP).

Research area: Fisheries Management
Research area: Fisheries Technology
Research area: Marine Living Resources
Effective start/end date01/01/201131/12/2014


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