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FRV Clupea 0503C

Cruise summary report

Cruise Info. 
Ship name (ship code)FRV Clupea (74CU)
Cruise identifier0503C
Cruise period2003-03-21 — 2003-03-30
StatusCompleted
Port of departureFraserburgh, United Kingdom
Port of returnFraserburgh, United Kingdom
PurposeResearch
Objectives1. To conduct a hydrographic survey along a transect offshore of Stonehaven. At pre-selected locations, the Seabird CTD sampler and the dual Bongo net will be deployed using a vertical dip. Water samples will be collected for salinity, nutrient and phytoplankton analysis. The 1 m plankton net will be deployed using a double oblique tow between selected stations along the transect.
2. To investigate the density distribution of sandeels buried in the sediment by carrying out a nocturnal stratified random Day grab survey across the Wee Bankie/Marr Bank study area. All sandeels caught will be measured, weighed and have their otoliths collected.
3. To investigate variation in sandeel population age structure at different locations on the Wee Bankie and Marr Bank from samples collected using the Sandeel dredge.
4. To determine spatial variation in water temperature and salinity across the Wee Bankie/Marr Bank study area using a Seabird CTD sampler. Approximately 40 vertical dip stations will be sampled, utilising as far as possible the day grab survey stations.
Chief scientistSimon Greenstreet (Fisheries Research Services Aberdeen Marine Laboratory)
Ocean/sea areas 
GeneralNorth Sea
SpecificStonehaven, Wee Bankie/Marr Bank
Measurements 
Physical oceanography 
Water bottle stationsQuantity: number of samples = 52
Description: Water samples
CTD stationsQuantity: number of stations = 51
Description: CTD stations
Chemical oceanography 
PhosphateQuantity: number of samples = 11
Description: Phosphate samples
NitrateQuantity: number of samples = 11
Description: Nitrate samples
AmmoniaQuantity: number of samples = 11
Description: Ammonia samples
SilicateQuantity: number of samples = 11
Description: Silicates
Biology and fisheries 
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: number of samples = 52
Description: Chlorophyll samples