RV Cirolana CIR6/83

Cruise summary report

Cruise Info. 
Ship name (ship code)RV Cirolana (74CZ)
Cruise identifierCIR6/83
Cruise period1983-05-24 — 1983-06-20
Port of departureGrimsby, United Kingdom
Port of returnGrimsby, United Kingdom
Objectives1. To conduct a plankton survey of the area to assess the abundance of mackerel eggs and larvae.
2. To sample mackerel and other pelagic species on the spawning grounds using either bottom or midwater trawls and to sample other groundfish.
3. To use the 2m neuston net to sample mackerel larvae at the surface.
4. To take surface water samples for shipboard analysis of chlorophyll 'a' and phaeophytins.
5. To rendezvous with RV CHALLENGER (SIC S Coombs) at Great Sole Bank and carry out comparative hauls with them using the UOR (undulating oceanographic recorder).
Chief scientistB C Bedford (Ministry of Agriculture, Fisheries and Food Lowestoft Fisheries Laboratory)
ProjectMackerel Egg Survey
Coordinating bodyICES
Cruise reportRV Cirolana CIR6/83 cruise report ci6_83.pdf (0.33 MB) 
Ocean/sea areas 
GeneralIrish Sea and St. George's Channel
North East Atlantic Ocean (limit 40W)
SpecificContinental Slope - West of Ireland, Celtic Sea, North Biscay
Track chartsRV Cirolana CIR6/83 cruise track — trk2937.html RV Cirolana CIR6/83 cruise track — trk2937a.html
Physical oceanography 
Water bottle stationsQuantity: number of stations = 8
Description: See MAFF Fisheries Research Data Report No 17, 1989
Biology and fisheries 
PhytoplanktonQuantity: number of hauls = 151
Description: hauls made with the 53cm plankton sampler.
ZooplanktonQuantity: number of hauls = 151
Description: hauls made with the 53cm plankton sampler.
NeustonQuantity: number of stations = 33
Description: The two metre Neuston net was towed for half an hour at the surface at approximately noon and midnight each day.
Pelagic fishQuantity: number of hauls = 10
Description: one hour hauls were made using the Portuguese high headline trawls.