Effect of codend circumference, mesh size & lastridge ropes
on cod selectivity in the Baltic Sea
Target species:
Cod (Gadus morhua)
Area, Vessel
The trial took place in the Baltic Sea (ICES Divisions 27.3.d.24 and 27.3.d.25) on board R218 Judith Bechmann (25.9 m, 485 kW)
Cod (Gadus morhua)
Area, Vessel
The trial took place in the Baltic Sea (ICES Divisions 27.3.d.24 and 27.3.d.25) on board R218 Judith Bechmann (25.9 m, 485 kW)
Gear type:
demersal
Gear modification
A T90 codend with 110 mm mesh size, a circumference of 92 meshes and lastridge ropes was compared with a standard T90 codend with 120 mm mesh size, 50 meshes in circumference and with no lastridge ropes.
demersal
Gear modification
A T90 codend with 110 mm mesh size, a circumference of 92 meshes and lastridge ropes was compared with a standard T90 codend with 120 mm mesh size, 50 meshes in circumference and with no lastridge ropes.
Results:
The modified codend significantly increased the retention of cod under 47 cm, but also increased the retention of undersized cod (at least 2 times more 30 cm cod). For individuals over 47 cm there is no significant difference in catch rates between the two codends.
The modified codend significantly increased the retention of cod under 47 cm, but also increased the retention of undersized cod (at least 2 times more 30 cm cod). For individuals over 47 cm there is no significant difference in catch rates between the two codends.
Further information:
Jordan Feekings (jpfe@aqua.dtu.dk)
Jordan Feekings (jpfe@aqua.dtu.dk)
Citation :
, 2017.
Effect of codend circumference, mesh size & lastridge ropes
. In O’Neill, F.G. and Mutch, K. (Eds): Selectivity in Trawl Fishing Gears. Scottish Marine and Freshwater Science Vol 8 No 1.