SELECT 3
| Type | Oceanographic cruise |
|---|---|
| Ship | Gwen Drez |
| Ship owner | Ifremer |
| Dates | 13/06/2009 - 25/06/2009 |
| Chief scientist(s) | MEILLAT Marc |
IFREMER STATION DE LORIENT 8, rue Francois Toullec 56100 LORIENT +33 (0)2.97.87.38.00 |
|
| DOI | 10.17600/9050060 |
| Objective | Improving selectivity of bottom trawls in mixed Nephrops/hake fisheries in the Bay of Biscay. In the framework of reducing discards in the mixed Nephrops/hake fishery, the cruise's objective was to validate the influence of the mesh openings of a trawl codend on selectivity. In fact, the only regulations concern the mesh size, without taking account of the way the open under the effect of various parameters entering into play during the trawl haul. No mesh, even large-sized, will be selective if it is completely closed. So the idea was to test two ways of opening the netting of a codend: - assemble the codend on short ropes (75% of the full stretched length) to force the meshes to open; - reversing the direction of the net from the direction of the lacing of the netting, to obtain the so-called T90 assembly. To test this, the twin-rig trawl technique was used to obtain qualitative and quantitative comparisons of catches between the select trawl and the reference trawl. The interest of this method is to obtain comparative data for each haul. This was part of the TECOS project. |
