a large 100 mm T90 mesh panel in the extension

to improve trawl selectivity

Target species:
John Dory, hake >36cm, haddock >34cm and monkfish

Area, Vessel
36 pairs of alternate hauls were carried out from June to August 2017 on board 20-24 m bottom trawlers fishing in the Celtic Sea.
Gear type:
demersal

Gear modification
The 120 mm SMP (9 m2) of a standard trawl with a 100 mm diamond mesh codend was replaced with a large (35 m2) 100 mm T90 panel.


Results:
The large T90 mesh panel improves catches of marketable hake and haddock while reducing catches of undersized and first commercial grades of these two species. In addition, the T90 panel allowed a moderate escape of boarfish, the 120mm PMC being already selective. An economic analysis showed that the increase in marketable catches could allow a 74% increase in hake turnover at the scale of the PO fleet studied (+4% of the total business figure).
Further information:
OP COBRENORD 02 96 70 81 04, contact@cobrenord.com http://www.cobrenord.com/2018/07/17/parution-du-rapport-final-du-projet-rejemcelec/




Citation :
, 2017. a large 100 mm T90 mesh panel in the extension . In O’Neill, F.G. and Mutch, K. (Eds): Selectivity in Trawl Fishing Gears. Scottish Marine and Freshwater Science Vol 8 No 1.