RV Cirolana CIR3/00

Cruise summary report

Cruise Info. 
Ship name (ship code)RV Cirolana (74CZ)
Cruise identifierCIR3/00
Cruise period2000-04-05 — 2000-04-27
Port of departureLowestoft, United Kingdom
Port of returnLowestoft, United Kingdom
Objectives1. To conduct a plankton survey using a Gulf VII high-speed plankton sampler to determine the distribution and abundance of plaice and cod eggs in the Irish Sea. To ultimately estimate the spawning stock biomass of these two species using the Annual Egg Production method (AEP).
2. Fish eggs were sorted from fresh plankton samples and frozen individually for subsequent species identification using iso-electric focusing.
3. To carry out a population survey and collect biological information and samples of mature plaice and cod using a Portuguese high-leadline trawl.
4. To continuously monitor sub-surface, temperature, salinity and nutrients (3m).
Chief scientistStephen Paul Milligan (Centre for Environment, Fisheries and Aquaculture Science Lowestoft Laboratory)
ProjectEU project DG XIV 98/090
Coordinating bodyDr. M. Armstrong, DARD/QUB, Belfast
Cruise reportRV Cirolana CIR3/00 cruise report ci3_00.pdf (0.23 MB) 
Ocean/sea areas 
GeneralIrish Sea and St. George's Channel
Specificbetween 53deg 00'N and 55deg 00'N
Track chartsRV Cirolana CIR3/00 cruise track — trk4400a.html RV Cirolana CIR3/00 cruise track — trk4400b.html RV Cirolana CIR3/00 cruise track — trk4400c.html
Physical oceanography 
CTD stationsQuantity: number of stations = 153
Description: CTD profiles ('V' shaped) on plankton sampler stations
Subsurface temperature and salinity measurementsQuantity: activity duration in days = 18
Description: 3m depth T & S, measurements. Logged every 15 mins. Of cruise track + every 1 minute while on plankton stations. (Some continuous nutrient data may be available).
Other physical oceanographic measurementsQuantity: number of samples = 75
Description: Surface seawater samples on alternate plankton stations, for subsequent salinity analysis
Chemical oceanography 
NitrateQuantity: number of samples = 153
Description: Frozen surface seawater samples for nutrient analysis (1 from each plankton station)
Biology and fisheries 
PhytoplanktonQuantity: number of samples = 19
Description: Surface seawater samples fixed in Lugals Iodine for subsequent phytoplankton analysis
ZooplanktonQuantity: number of samples = 153
Description: Fine mesh (64 um) net attached to above sampler
Eggs and larvaeQuantity: number of samples = 153
Description: 'V' high-speed plankton hauls - 280um mesh net.
Other biological/fisheries measurementQuantity: number of stations = 50
Description: Demersal and pelagic fish data from Portuguese high-leadline trawl hauls, including total weight of every species, length measurements, otolith collections, assessment of maturity, ovary collection.