decreasing codend circumference
to reduce whiting discards in a Nephrops trawl
Target species:
Nephrops norvegicus
Area, Vessel
The 12 haul quad-rig catch comparison trial took place in the Irish Sea (ICES 7a) on board a 23 m, 328 kW trawler during February 2018.
Nephrops norvegicus
Area, Vessel
The 12 haul quad-rig catch comparison trial took place in the Irish Sea (ICES 7a) on board a 23 m, 328 kW trawler during February 2018.
Gear type:
demersal
Gear modification
The test codend was constructed from 80mm* mesh with a circumference of 80 meshes round. The standard codend was constructed from 80mm* mesh with a circumference of 120 meshes round. A 300 mm square meshed panel was fitted between 9 and 12 m from the codline on both gears. The fishing circle of the quad-rigged Nephrops trawls was 400 X 80mm*. *nominal mesh size
demersal
Gear modification
The test codend was constructed from 80mm* mesh with a circumference of 80 meshes round. The standard codend was constructed from 80mm* mesh with a circumference of 120 meshes round. A 300 mm square meshed panel was fitted between 9 and 12 m from the codline on both gears. The fishing circle of the quad-rigged Nephrops trawls was 400 X 80mm*. *nominal mesh size
Results:
Moderate reductions in catches of whiting below MCRS of 27 cm. Greatest reductions in very small whiting < 20 cm. Total Nephrops catches reduced by 14% (by weight) and 8% (by value).
Moderate reductions in catches of whiting below MCRS of 27 cm. Greatest reductions in very small whiting < 20 cm. Total Nephrops catches reduced by 14% (by weight) and 8% (by value).
Further information:
http://www.bim.ie/our-publications/fisheries/
http://www.bim.ie/our-publications/fisheries/
Citation :
, 2017.
decreasing codend circumference
. In O’Neill, F.G. and Mutch, K. (Eds): Selectivity in Trawl Fishing Gears. Scottish Marine and Freshwater Science Vol 8 No 1.