using a flexible grid
to reduce capture of whiting and haddock in a nephrops trawl
Target species:
Nephrops and mixed round and flatfish
Area, Vessel
25 catch comparison hauls took place in the North Sea on board the FV Amity II PD 177 (21m, 400kW) during November 2012.
Nephrops and mixed round and flatfish
Area, Vessel
25 catch comparison hauls took place in the North Sea on board the FV Amity II PD 177 (21m, 400kW) during November 2012.
Gear type:
single trawl
Gear modification
A flexible grid with 45mm bar spacing and with bottom gaps of (i) 315mm and (ii) 200mm was fitted into the extension of a Nephrops trawl
single trawl
Gear modification
A flexible grid with 45mm bar spacing and with bottom gaps of (i) 315mm and (ii) 200mm was fitted into the extension of a Nephrops trawl
Results:
There were no losses of haddock or whiting. Fewer smaller cod (< 78 cm) were caught, but above 78 cm, there was no difference. Monkfish catches were 16% less, but these were all small (< 55cm). Megrim catches were reduced by 43%.
There were no losses of haddock or whiting. Fewer smaller cod (< 78 cm) were caught, but above 78 cm, there was no difference. Monkfish catches were 16% less, but these were all small (< 55cm). Megrim catches were reduced by 43%.
Further information:
Jim Drewery (j.drewery@marlab.ac.uk)
Jim Drewery (j.drewery@marlab.ac.uk)
Citation :
Drewery, J.
, 2017.
using a flexible grid
. In O’Neill, F.G. and Mutch, K. (Eds): Selectivity in Trawl Fishing Gears. Scottish Marine and Freshwater Science Vol 8 No 1.