The effect of a divided codend
on the discard survival of undersized plaice in the Danish Norway lobster fishery
Target species:
European plaice (Pleuronectes platessa)
Area, Vessel
Fishing trials took place in the Skagerrak (ICES IIIa) on board S84 Ida-Katrine (15.1 m, 221 kW)
European plaice (Pleuronectes platessa)
Area, Vessel
Fishing trials took place in the Skagerrak (ICES IIIa) on board S84 Ida-Katrine (15.1 m, 221 kW)
Gear type:
demersal
Gear modification
A commercial twin rig trawl gear was fished. A standard 90 mm diamond mesh codend was attached to one net, and a horizontally divided codend with 120mm square mesh in the upper panel and 60mm square mesh in the lower panel was attached to the other. The trials took place during the winter when targeting Norway lobster. The catch was sorted on deck following usual commercial practise. and u Undersized plaice that would have previously been discarded, were placed in specially designed holding tanks.
demersal
Gear modification
A commercial twin rig trawl gear was fished. A standard 90 mm diamond mesh codend was attached to one net, and a horizontally divided codend with 120mm square mesh in the upper panel and 60mm square mesh in the lower panel was attached to the other. The trials took place during the winter when targeting Norway lobster. The catch was sorted on deck following usual commercial practise. and u Undersized plaice that would have previously been discarded, were placed in specially designed holding tanks.
Results:
There was no difference in survival probability of undersized plaice between the lower compartment of the modified codend and the standard codend after 14 days in captivity. There was an indication of higher survival of undersized plaice in the upper compartment of the modified codend.
There was no difference in survival probability of undersized plaice between the lower compartment of the modified codend and the standard codend after 14 days in captivity. There was an indication of higher survival of undersized plaice in the upper compartment of the modified codend.
Further information:
Citation :
, 2017.
The effect of a divided codend
. In O’Neill, F.G. and Mutch, K. (Eds): Selectivity in Trawl Fishing Gears. Scottish Marine and Freshwater Science Vol 8 No 1.