moving a square mesh panel (smp) closer to the codline
to reduce discards of haddock and whiting in a whitefish trawl
Target species:
Haddock and whiting.
Area, Vessel
20 catch comparison twin trawl hauls took place in the North Sea on board the Challenge UL33 (27.69 m, 731 kW) during 2001
Haddock and whiting.
Area, Vessel
20 catch comparison twin trawl hauls took place in the North Sea on board the Challenge UL33 (27.69 m, 731 kW) during 2001
Gear type:
twin trawl
Gear modification
The effect of inserting a 90 mm smp panel at 3 different positions; 3 - 6 m, 6 - 9 m, and 9 - 12 m, in a 100 mm codend is investigated.
twin trawl
Gear modification
The effect of inserting a 90 mm smp panel at 3 different positions; 3 - 6 m, 6 - 9 m, and 9 - 12 m, in a 100 mm codend is investigated.
Results:
Inserting a 90 mm square mesh panel at any of the three positions reduces the number of discards. More fish escaped through the panel positioned 3 – 6 m from the codline than through those positioned 6 - 9 m or 9 - 12 m from the codline.
Inserting a 90 mm square mesh panel at any of the three positions reduces the number of discards. More fish escaped through the panel positioned 3 – 6 m from the codline than through those positioned 6 - 9 m or 9 - 12 m from the codline.
Further information:
Graham, N. et al., 2003. Square mesh panels in demersal trawls: further data relating haddock and whiting selectivity to panel position. Fish Res. 62, 361-375
Graham, N. et al., 2003. Square mesh panels in demersal trawls: further data relating haddock and whiting selectivity to panel position. Fish Res. 62, 361-375
Citation :
Graham, N. et al.
, 2017.
moving a square mesh panel (smp) closer to the codline
. In O’Neill, F.G. and Mutch, K. (Eds): Selectivity in Trawl Fishing Gears. Scottish Marine and Freshwater Science Vol 8 No 1.