|Ship name (ship code)||Genesis (74GI)|
|Cruise period||2010-01-29 — 2010-02-12|
|Port of departure||Peterhead, United Kingdom|
|Port of return||Peterhead, United Kingdom|
1. To assess the performance of three different large diamond mesh (300mm, 600mm and 800mm) netting panels inserted into the belly sheet of a commercial whitefish trawl in reducing cod by-catches.
Staff and equipment will join Genesis (BF505) at Macduff on 29 January 2010. Staff will then commence modifying one of the vessels commercial whitefish twin trawls, which will be the test net. The other trawl will be left unmodified and act as the standard trawl to allow a comparison to be made against the test trawl.
The test trawl will be modified by inserting a 300mm diamond mesh netting section directly behind the second tearing strip, approximately 4m behind fishingline centre. The 300mm netting section will cover the full width of the belly sheet and be approximately 12m long. This section will replace the existing 120mm x 100 meshes deep netting section. During the cruise three different mesh sizes will be tested all inserted at the same location; 300mm, 600mm and 800mm. Each test case will be fished until sufficient valid hauls have been obtained before it's changed over. Both trawls will be rigged with 120mm (nominal) diamond mesh extensions and codends constructed from 5mm high tenacity single and double twine respectively. Throughout the trials, the twin trawl method will be used to assess the performance of the test trawl compared to the standard trawl. Catch comparison data will be collected for Cod, haddock, whiting, monkfish and any other commercial species as available.
After rigging has been completed the vessel will sail to commercial grounds in the North Sea possibly NE of the Shetland Islands and commence catch comparison hauls. The exact area to be fished will be decided after consultation with the skipper and dependent on the prevailing weather conditions. The cruise will end at Peterhead on 12 February when staff and equipment will return to Aberdeen. Ship's accommodation will be used throughout the cruise
Normal contacts will be maintained with the Laboratory.
|Chief scientist||Robert J Kynoch (Marine Scotland Aberdeen Marine Laboratory)|