The Netherlands Institute for Fisheries Research has been commissioned by the Dutch Fisheries Product Board to carry out a study on the effects of twin trawl fishery on the sustainable exploitation of demersal fish stocks. The twin trawl fishery appears to grow quickly, but there are many uncertainties about the advantages and disadvantages of this fishery on fish stocks. Advantages due to the light type of gear are the low use of fuel, the high quality of landings and the relatively low disturbance of the seabed. Negative effects mentioned are the large surface that is fished, which would result in high catches and large numbers of discards. Moreover, under certain conditions, twin trawlers are allowed to use smaller mesh sizes than beam trawlers, which may result in more discards of undersized fish. This study aims at making an objective and quantitative description of the twin trawl fishery in the Netherlands and consists of three parts: 1) a description of technical and fishery biological aspects; 2) a study on discards (part of the catch returned to the sea) and; 3) an integrated description of the twin trawl fishery and a comparison with the beam trawl fishery. The present report describes the second part: discarding in the twin trawl fishery. This report gives an overview of the discarding practices in the twin trawl fishery in the Netherlands.
|Place of Publication||IJmuiden|
|Number of pages||57|
|Publication status||Published - 2004|
- demersal fisheries
- demersal fishes
- fish stocks
- beam trawling