using a sorting grid
to change the size selectivity of Gadus morhua
Target species:
Cod (Gadus morhua)
Area, Vessel
The trial took place in the Western Baltic Sea (SD 24) on board FFS Solea (42,4 m, 1780 kW).
Cod (Gadus morhua)
Area, Vessel
The trial took place in the Western Baltic Sea (SD 24) on board FFS Solea (42,4 m, 1780 kW).
Gear type:
demersal
Gear modification
The sorting grid (42.5 mm and 50 mm) prevents very large cod passing through to the codend and guides them to an upper escapement outlet which is masked with small-meshed netting. Medium and small cod pass through the grid and the selection of small cod occurs in the codend (105 mm and 120 mm).
demersal
Gear modification
The sorting grid (42.5 mm and 50 mm) prevents very large cod passing through to the codend and guides them to an upper escapement outlet which is masked with small-meshed netting. Medium and small cod pass through the grid and the selection of small cod occurs in the codend (105 mm and 120 mm).
Results:
It was possible to reduce the number of small and very large cod in the catch. The specific size distribution of the catch is determined by the grid bar spacing and the codend mesh size. The contact probability should be improved.
It was possible to reduce the number of small and very large cod in the catch. The specific size distribution of the catch is determined by the grid bar spacing and the codend mesh size. The contact probability should be improved.
Further information:
Stefanie Haase (stefanie.haase@thuenen.de)
Stefanie Haase (stefanie.haase@thuenen.de)
Citation :
, 2017.
using a sorting grid
. In O’Neill, F.G. and Mutch, K. (Eds): Selectivity in Trawl Fishing Gears. Scottish Marine and Freshwater Science Vol 8 No 1.