increasing codend mesh size from 80 to 90mm
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 and extension piece were constructed from 90mm* diamond mesh with 100 meshes in circumference. The standard codend and extension piece were constructed from 80mm* diamond mesh. with 120 meshes in circumference. 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 and extension piece were constructed from 90mm* diamond mesh with 100 meshes in circumference. The standard codend and extension piece were constructed from 80mm* diamond mesh. with 120 meshes in circumference. 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:
Substantial reductions in catches of whiting below MCRS of 27 cm. Greatest reductions in very small whiting < 20 cm. Total Nephrops catches reduced by 33 % (by weight) and 23 % (by value).
Substantial reductions in catches of whiting below MCRS of 27 cm. Greatest reductions in very small whiting < 20 cm. Total Nephrops catches reduced by 33 % (by weight) and 23 % (by value).
Further information:
http://www.bim.ie/our-publications/fisheries/
http://www.bim.ie/our-publications/fisheries/
Citation :
, 2017.
increasing codend mesh size from 80 to 90mm
. In O’Neill, F.G. and Mutch, K. (Eds): Selectivity in Trawl Fishing Gears. Scottish Marine and Freshwater Science Vol 8 No 1.