RRS Frederick Russell FR7/84

Cruise summary report

Cruise Info. 
Ship name (ship code)RRS Frederick Russell (74GG)
Cruise identifierFR7/84
Cruise period1984-04-18 — 1984-05-01
Port of departureFalmouth, United Kingdom
Port of returnPlymouth, United Kingdom
ObjectivesTo investigate benthic invertebrate community structure (macrobenthos and meiobenthos) across the Shelf break and down the Continental Slope, as it relates to production and sedimentation processes in the water column.
(a) To collect and process a series of replicate benthic samples from eight stations between 170 and 4,500m depth for subsequent analysis in the laboratory on return to Plymouth.
(b) To measure in situ and on deck primary production at seven stations and to partition production into different size-classes of phytoplankton: to measure the abundance and vertical distribution of phytoplankton, bacteria and flagellates: to measure bacterial production throughout the water column. To obtain concentrated samples for culturing of cyanobacteria and for TEM examination.
(c) To deploy and recover sediment traps at two stations at the Shelf break, and to service a sediment trap array off Plymouth.
(d) To test the Undulating Oceanographic Recorder sensor and recording packages: to modify servo control logic: to adjust servo gain circuitry/crank arm leverage: to continue bridal/wing configuration trials: to run a standard sampling transect for environmental parameters and fish eggs across the Shelf edge and Great Sole Bank.
Additionally, to obtain undisturbed cores of deep-sea sediment for analysis of distribution of natural radionuclides (for E I Hamilton, IMER) and to obtain living specimens of the sipunculans Aspidosiphon muelleri and Phascolion strombi for chemical analysis of body fluids (for P Gibbs, MBA).
Chief scientistRichard Warwick (Institute of Marine Environmental Research, Plymouth)
Cruise reportRRS Frederick Russell FR7/84 cruise report frederick_russell7_84.pdf (0.23 MB) 
Ocean/sea areas 
GeneralNorth East Atlantic Ocean (limit 40W)
SpecificWestern Approaches/ Porcupine Sea Bight
Track chartsRRS Frederick Russell FR7/84 cruise track — trk3292.html
Biology and fisheries 
Primary productivityQuantity: number of stations = 7
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: number of stations = 7
Sediment trapsQuantity: number of deployments = 2
PhytoplanktonQuantity: number of stations = 7
Pelagic bacteria/micro-organismsQuantity: number of stations = 7
ZoobenthosQuantity: number of stations = 7
Description: survey:distribution,biomass determination,energy transfers,population
Geology and geophysics 
GrabQuantity: number of samples = 30
Description: day grab,for biological studies
Core - soft bottomQuantity: number of cores = 16
Description: box corer,physical analysis for biological studies