RV Cirolana CIR5/84

Cruise summary report

Cruise Info. 
Ship name (ship code)RV Cirolana (74CZ)
Cruise identifierCIR5/84
Cruise period1984-05-22 — 1984-06-17
Port of departureGrimsby, United Kingdom
Port of returnGrimsby, United Kingdom
Objectives1. Acoustic range trials.
2. To repeat standard trawl hauls on the Smalls Ground.
3. To carry out a series of transects across the NW Irish Sea front with a High Speed Tow Net and echo integrator.
4. To fish for potential predators on fish and Nephrops larvae, using a midwater trawl and high headline bottom trawl.
5. To fish for cod over a 24h period in order to investigate whether diel variations in feeding on adult Nephrops can be used to estimate consumption rates.
6. To carry out detailed sampling of Nephrops larvae distributions using HSTN and other gear.
7. To produce vertical profiles of particle size using water bottle samples and HIAC counter.
8. To produce verticle profiles of plankton distributions in areas of high density of fish and Nephrops larvae, using a Longhurst-Hardy Plankton Recorder.
9. To carry out a survey of fish and benthos across the position of the NW Irish Sea Front (using a bottom trawl with headline camera and an Agassiz trawl).
10. To produce a photographic index of common epibenthic species.
Chief scientistKeith M Brander (Ministry of Agriculture, Fisheries and Food Lowestoft Fisheries Laboratory)
Cruise reportRV Cirolana CIR5/84 cruise report ci5_84.pdf (0.27 MB) 
Ocean/sea areas 
GeneralIrish Sea and St. George's Channel
Bristol Channel
SpecificIrish Sea
Track chartsRV Cirolana CIR5/84 cruise track — trk3048.html RV Cirolana CIR5/84 cruise track — trk3048a.html RV Cirolana CIR5/84 cruise track — trk3048b.html
Physical oceanography 
CTD stationsQuantity: number of stations = 19
Biology and fisheries 
PhytoplanktonQuantity: number of samples = 143
ZooplanktonQuantity: number of samples = 143
Pelagic fishQuantity: number of hauls = 15
Description: using the Portuguese high headline trawl.
Pelagic fishQuantity: number of stations = 16
Description: worked using Isaacs Kidd trawl.
Pelagic fishQuantity: number of hauls = 8
Description: Engel hauls
Demersal fishQuantity: number of hauls = 13
Description: Agassiz trawls.