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FRV Clupea 0901C

Cruise summary report

Cruise Info. 
Ship name (ship code)FRV Clupea (74CU)
Cruise identifier0901C
Cruise period2001-07-06 — 2001-07-20
StatusCompleted
Port of departureFraserburgh, United Kingdom
Port of returnFraserburgh, United Kingdom
Objectives1. To undertake plankton tows for sea lice naupllii and copepodid stages in Loch Torridon.
2. To conduct CTD and water sampling surveys in the Loch Torridon area.
3. To collect sedimetn samples in Loch Duich for studies of nitrogen cycling in sea loch sediments.
4. To collect sediment samples in Loch Duich for studies of ammonia-oxidising bacteria at fish farms.
5. To recover hydrographic moorings from Loch Torridon and adjacent coastal waters.
Chief scientistIan M Davies (Fisheries Research Services Aberdeen Marine Laboratory), Phil A Gillibrand (Fisheries Research Services Aberdeen Marine Laboratory)
Ocean/sea areas 
GeneralInner Seas off the West Coast of Scotland
SpecificLoch Torridon, North Minch
Measurements 
Physical oceanography 
CTD stationsQuantity: number of profiles = 45
Description: Seabird SBE25 CTD temperature and conductivity profiles (depth profiles)
Biology and fisheries 
ZooplanktonQuantity: number of samples = 45
Description: Zooplankton samples collected by Neuston net and/or sub-surface pump. Cod-end mesh = 95 mirco metres. Samples collected for identification of sea lice nauplii and copepodid stages.
Geology and geophysics 
GrabQuantity: number of samples = 36
Description: Grab samples collected along transects adjacent to fish farm cages for delta 15N analysis.
Core - soft bottomQuantity: number of cores = 12
Description: Sediment cores collected using a sholhovitz and box corer. Samples processed for delta 15N incubation experiments, sediment microbiology and whole sediment chemistry.
Core - soft bottomQuantity: number of samples = 16
Description: Pore water samples were collected using conventional extraction techniques, diffusion equilibralian thin film gels and diffusion gradient thin samples collected for the determination of diagentic processes and benthic fluxes
Moorings, landers, buoys 
Physical oceanography 
Current meters57° 38' 21" N  5° 56' 30" W — Two Aanderaa RCM-7 meters, deployed at 30 and 95 m in 105m of water, recovered on 17/7/01 after deployment on 5/4/01. Measuring velocity, temperature and conductivity.
Current meters57° 31' 0" N  5° 40' 0" W — Sontek Argonaunt current meter deployed at 3m depth in 28m of water, recovered on 18/7/01 after deployment on 5/4/01. Measured current speed and direction.
Sea level (inc. bot. press., inverted echosounder)57° 34' 59" N  5° 58' 0" W — Aanderaa WLR-5 bottom pressure sensor deployed at RONA. Recovered on 17/7/01 after deployment on 9/4/01. Measured seabed pressure and temperature.
Sea level (inc. bot. press., inverted echosounder)57° 43' 59" N  5° 47' 59" W — Aanderaa WLR-5 bottom pressure sensor deployed near Gairloch. Recoverded on 18/7/01 after deployment on 9/4/01. Measured seabed pressure and temperature.