FRV Explorer 5/80

Cruise summary report

Cruise Info. 
Ship name (ship code)FRV Explorer (74EX)
Cruise identifier5/80
Cruise period1980-04-14 — 1980-04-30
Port of returnLeith, United Kingdom
Objectives1) To undertake monitoring surveys at Bell Rock and St Abbs Head sludge dumping grounds
2) To measure the productivity of the outer reaches of the Moray Firth
3) To investigate the status of the offshore benthic communities in the northen North Sea
4) Trials of the underwater TV sledge took place
5) Trials of the Reineck and Craib corers were carried out in Lerwick Bay
6) Additional benthic stations along the coast between the Firth of Forth and Stonehaven were introduced and successfully sampled
7) Samples of fish for bacteriological analysis were obtained by trawling

Crew shortages delayed departure until the 14/04/1980. The ship remained stormbound in Stavanger from the 19/04/1980 till the 21/04/1980
Chief scientistAnastasios Eleftheriou (Department of Agriculture and Fisheries for Scotland Aberdeen Marine Laboratory)
Cruise reportFRV Explorer 5/80 cruise report explorer5_80.pdf (1.26 MB) 
Ocean/sea areas 
GeneralNorth Sea
SpecificMoray Firth, Orkney, Stavanger, Norwegian coast, Bergen to Shetland area, Lerwick Bay, Moray Firth, Firth of Forth, St Abbs Head, Bell Rock
Track chartsFRV Explorer 5/80 cruise track — explorer5_80track.pdf (1.13 MB) 
Physical oceanography 
Water bottle stationsQuantity: number of stations = 3
Chemical oceanography 
NitrateQuantity: 3
Total - NQuantity: 3
Other chemical oceanographic measurementsQuantity: 3
Description: chlorinity
Trace metalsQuantity: 92
Description: physical analysis of sediments
Bottom depositsQuantity: 34
Description: For macrobenthos, meiobenthos, and sediment for particle size analysis, carbon content, heavy metals and organic pesticide residues. The epibenthos was assessed by Agassiz trawl, GOV trawl and underwater TV
Contaminants in organismsQuantity: 18
Biology and fisheries 
Primary productivityQuantity: 92
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: 92
Particulate organic matter (inc POC, PON)Quantity: 92
ZoobenthosQuantity: 92
Demersal fishQuantity: number of hauls = 5
Description: survey:taxonomy,biomass determination
Other biological/fisheries measurementQuantity: 16
Description: TV
Other biological/fisheries measurementQuantity: 92
Description: Agassiz trawls
Geology and geophysics 
Bottom photographyQuantity: 16
Description: motion picture