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FRV Clupea 0604C

Cruise summary report

Cruise Info. 
Ship name (ship code)FRV Clupea (74CU)
Cruise identifier0604C
Cruise period2004-04-02 — 2004-04-21
StatusCompleted
Port of departureFraserburgh, United Kingdom
Port of returnFraserburgh, United Kingdom
PurposeResearch
ObjectivesTo conduct a 'spring' survey of a suite of sea lochs/voes impacted to various degrees by nutrient releases from fish farming activity. This survey forms part of an ongoing programme of work to assess the potential for eutrophication arising from nutrient 'hotspots' linked to aquaculture. This will be undertaken by measuring the following parameters at multiple stations in each loch:
1. CTD
2. Nutrients (including silicates)
3. Chlorophyll-a
4. Phytoplankton
5. Shoreline macroalgae
6. Organic carbon in sediments
7. Algal toxins in wild shoreline mussels
These determinands will be assessed against criteria as defined by the OSPAR Eutrophication Task Group and used for future eutrophication assessment of Scottish coastal waters. Data will also be compared to that collected during 2002 and will be used to inform estimates of internal mixing within sea lochs/voes to improve laboratory models to predict nutrient enhancement from aquaculture.
Chief scientistMatt Gubbins (Fisheries Research Services Aberdeen Marine Laboratory)
Cruise reportFRV Clupea 0604C cruise report 0604c.pdf (0.24 MB) 
Ocean/sea areas 
GeneralNorth Sea
Inner Seas off the West Coast of Scotland
SpecificWestern Isles; Skye; Edrachillis Bay; Shetland
Measurements 
Physical oceanography 
CTD stationsQuantity: number of profiles = 119
Chemical oceanography 
PhosphateDescription: Survey for nutrients to assess potential for eutrophication.
NitrateDescription: Survey for nutrients to assess potential for eutrophication.
NitriteDescription: Survey for nutrients to assess potential for eutrophication.
SilicateDescription: Survey for nutrients to assess potential for eutrophication.
Biology and fisheries 
Phytoplankton pigs (eg chlorophyll, fluorescence)Description: Survey for nutrients to assess potential for eutrophication.
PhytoplanktonQuantity: number of samples = 90
Description: samples collected using phytoplankton hose.
ZooplanktonQuantity: number of hauls = 29
Benthic bacteria/micro-organismsQuantity: number of samples = 73
Description: macroalgae sites sampled using Zodiak inflatable.
Other biological/fisheries measurementQuantity: number of samples = 45
Description: Toxic phytoplankton samples
Geology and geophysics 
GrabQuantity: number of samples = 138
Description: Day grab sediment samples.