Cruise inventory

FRV Alba Na Mara 1315A

Cruise plan

Cruise Info. 
Ship name (ship code)FRV Alba Na Mara (74NM)
Cruise identifier1315A
Cruise period2015-09-01 — 2015-09-10
StatusCompleted
Port of departureFraserburgh, United Kingdom
Port of returnFraserburgh, United Kingdom
PurposeResearch
ObjectivesObjectives

1. Testing a range of light emitting devices to assess whether they withstand the trawling process at a variety of positions on the trawl.
2. Live capture of haddock for fish behaviour work back at the lab by trawling with a live fish codend and deployment of fish traps.
3. Testing durability of the rigid grid fitted into the extension of the trawl. Assessing the effect that separator bar height and lights attached to the grid has on catch composition.
4. Camera footage of a range of light emitting devices, separator panel operations and rigid grid deployments.

Procedure

Alba na Nara will depart Fraserburgh on 1 September and steam to a suitable nearby fishing ground. Trials will be carried out to allow light-emitting battery powered devices to be attached to different parts of the trawl and their ability to withstand the trawling process assessed. At the end of each working day, and for the first four days of the survey the vessel will return to Fraserburgh overnight. On the morning of 5 September D. Watson will disembark the vessel and J Mair will join for the remainder of the survey. Once the testing of the light emitting devices is complete, work will focus on the collection of live haddock by trawling with the BT 201 with the live fish codend. Fish traps will be deployed for retrieval at a later date. The length of deployment and depth at which the traps are set will be based on success rates of initial deployments at different depths and different soak times. The live fish capture will require slow retrieval of the trawl and fish traps to ensure the best quality of fish possible. Trials will also be carried out using the BT 201 where the separator panel has been removed and a rigid grid inserted into the extension. These modifications will take place on-board Alba na Mara. Trials will be carried out to identify any necessary modifications required to optimise fishing with this device. Trials will be carried out within the Moray Firth on prawn grounds and if possible anchoring overnight. The vessel will return to Fraserburgh on the evening of 9 September and the scientific personnel and equipment will be unloaded the following day.
Chief scientistKeith Summerbell (Marine Scotland Aberdeen Marine Laboratory)
Ocean/sea areas 
GeneralNorth Sea
SpecificMoray Firth