FRV Clupea 0307C
Cruise summary report
|Ship name (ship code)||FRV Clupea (74CU)|
|Cruise period||2007-03-01 — 2007-03-10|
|Port of departure||Fraserburgh, United Kingdom|
|Port of return||Fraserburgh, United Kingdom|
1. To use underwater cameras, to obtain estimates of the distribution and abundance of Nephrops, Nephrops burrows and other fauna in Loch Torridon and the Inner Sound areas.
2. To collect sediment samples at each station.
3. To use trawl caught samples of Nephrops to examine biological features at different sites throughout the survey areas.
4. To record benthic fauna interactions with a creel whilst in-situ.
5. To use the TV survey to collect data on other benthic fauna.
6. To carry out similar surveys in neighboring Lochs if weather permits.
A Weetman and P Barkel joined the vessel in Fraserburgh on 1 March, but due to gales, sailing was delayed until 0815 on the 2 March. In transit to the West Coast, the sea state improved.
After arriving off Gairloch in the early hours on the morning of 3 March TV work began at 0730 in breezy conditions. During the initial deployment it became apparent that the TV umbilical was coming into contact with the micro switch housing on the TV winch's guiding on gear and that the vertical tensioning guides on the TV winch were seized. This resulted in a delay of 2½ hours after which the ship's engineers rectified the problem. The remainder of the day was spent completing six TV stations across the North of the survey area, before heading to Gairloch for the night, where J Drewery joined the vessel.
With westerly gales imminent, a route was set to cover stations towards the Isle of Skye and the Sound of Raasay. Eight TV stations were successfully completed during the day with a further two aborted due to either unsuitable substrate or trawler activity creating poor visibility. With a 40 knot South Easterly gale on 5 March the only area where the vessel could safely and effectively carry out TV camera work was in the Sound of Raasay.
|Chief scientist||Adrian Weetman (Fisheries Research Services Aberdeen Marine Laboratory)|
|Cruise report||(0.13 MB)|
Inner Seas off the West Coast of Scotland
|Specific||Gairloch, Skye and Orkney|
|Biology and fisheries|
|Crustaceans||Quantity: number of hauls = 1|
Description: Fishing trawl using a 50 mm prawn trawl BT 149B. Nephrops caught. Carapace length and width, and cutter and crushers claws' length, width and height recorded. The length of the appenix masculina measured for each male.
|Geology and geophysics|
|Grab||Quantity: number of samples = 25|
Description: Sediment samples collected using a Day grab and table. Analysed for particle size in the laboratory
|Bottom photography||Quantity: number of deployments = 1|
Description: Creel Cam.
|Bottom photography||Quantity: number of stations = 3|
Description: Sites surveyed with the camera to examine the extent of suitable Nephrops grounds
|Bottom photography||Quantity: number of images = 34|
Description: Taken with Benthos camera providing a high resolution record of benthic scenes