using rigid Swedish grids
to reduce the capture of fish species in a Nephrops trawl
Target species:
Nephrops
Area, Vessel
31 twin trawl catch comparison hauls were carried out in the North Sea and east of Shetland on board the Fruitful Bough PD 109 (522kW) during 2010.
Nephrops
Area, Vessel
31 twin trawl catch comparison hauls were carried out in the North Sea and east of Shetland on board the Fruitful Bough PD 109 (522kW) during 2010.
Gear type:
twin trawl
Gear modification
Two Swedish grids were tested in a standard nephrops trawl. They had (i) 35 mm bar spacing and (ii) 40 mm bar spacing. The catches were compared with those in a 40 mm codend which estimates the population on the fishing grounds
twin trawl
Gear modification
Two Swedish grids were tested in a standard nephrops trawl. They had (i) 35 mm bar spacing and (ii) 40 mm bar spacing. The catches were compared with those in a 40 mm codend which estimates the population on the fishing grounds
Results:
Both grids eliminated catches of large fish. There was a loss of smaller Nephrops(< 41-45 mm carapace length) due to their selection from the 80mm codend. There was no significant loss of larger Nephrops.
Both grids eliminated catches of large fish. There was a loss of smaller Nephrops(< 41-45 mm carapace length) due to their selection from the 80mm codend. There was no significant loss of larger Nephrops.
Further information:
Jim Drewery (j.drewery@marlab.ac.uk) Drewery J., 2011. 35 and 40mm Swedish grids in a Scottish Nephrops trawl fishery. Scottish Marine and Freshwater Science Vol 02 No 04.
Jim Drewery (j.drewery@marlab.ac.uk) Drewery J., 2011. 35 and 40mm Swedish grids in a Scottish Nephrops trawl fishery. Scottish Marine and Freshwater Science Vol 02 No 04.
Citation :
Drewery J.
, 2017.
using rigid Swedish grids
. In O’Neill, F.G. and Mutch, K. (Eds): Selectivity in Trawl Fishing Gears. Scottish Marine and Freshwater Science Vol 8 No 1.