RV Cirolana CIR7/85

Cruise summary report

Cruise Info. 
Ship name (ship code)RV Cirolana (74CZ)
Cruise identifierCIR7/85
Cruise period1985-08-13 — 1985-09-11
Port of departureLowestoft, United Kingdom
Port of returnLowestoft, United Kingdom
Objectives1. To carry out a groundish survey of the North Sea using a standard Granton trawl in order to obtain information on:
(i) the distribution and abundance of all fish species caught in the trawl.
(ii) the length and age distributions of commercially important gadoids.
(iii) the distribution and fish in relation to environmental parameters.
(iv) the distribution and relative abundance of macro benthos.
(v) gadoid interactions through collections of stomachs from cod and whiting for the ICES programme on stomach analysis.
(vi) the distribution of caesium in fish flesh via trawl samples of fish for analysis at Lowestoft.
2. Collect water samples for caesium analysis from the pumped water supply and using Niskin bottles.
3. Sample the environment using electronic sensors either in the pumped water supply or by deploying the instruments in a sampling frame.
4. Examine benthos using:
a) the Granton trawl
b) an Agassiz trawl with meter wheel filled to give distance measurements
c) a Day grab at selected stations. No records from the Day grab which was damaged beyond repair on the first haul.
5. All biological data will be entered on the computer to create a database for this cruise and summarise results before the cruise ends.
6. All electronic instruments will be data logged and programmes used to extract and present results in graphics format. No graphics output was possible.
7. Collect live specimens of fish for Mr Scholes including Myxine, 20 adult female dabs, 10 small cod (<20cm) and 5 soles (<20cm).
8. Collect whiting samples for a research project on Lernaeocera branohialis based at Kings College, London.
9. Release drift indicators for Turbot larvae off the NE Coast.
10. Collect a small halibut (10-100cm) for the archaeology unit at Cambridge University. Not achieved.
Chief scientistDerek Harding (Ministry of Agriculture, Fisheries and Food Lowestoft Fisheries Laboratory)
Cruise reportRV Cirolana CIR7/85 cruise report ci7_85.pdf (0.22 MB) 
Ocean/sea areas 
GeneralNorth Sea
SpecificNorth Sea
Track chartsRV Cirolana CIR7/85 cruise track — trk3119.html
Physical oceanography 
CTD stationsQuantity: number of stations = 70
Chemical oceanography 
RadioactivityQuantity: number of samples = 50
Biology and fisheries 
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: number of stations = 70
Description: chlorophyll "A" profile
PhytobenthosQuantity: number of samples = 46
ZoobenthosQuantity: number of samples = 46
Demersal fishQuantity: number of hauls = 74