RV Cirolana CIR5/02
Cruise summary report
| Cruise Info. | |
| Ship name (ship code) | RV Cirolana (74CZ) |
| Cruise identifier | CIR5/02 |
| Cruise period | 2002-08-08 — 2002-09-07 |
| Status | Completed |
| Port of departure | Lowestoft, United Kingdom |
| Port of return | Lowestoft, United Kingdom |
| Purpose | Research |
| Objectives | This cruise is in two parts. Part A: 08-23 August; Part B: 24 August to 07 September.
1. To carry out a groundfish survey of the North Sea as part of the ICES co-ordinated IBTS, using a standard GOV trawl in order to obtain information on: a) distribution, size composition and abundance of all fish species caught; b) age - length distribution of selected species; c) distribution of fish in relation to their environment; d) distribution of macrobenthos and anthropogenic debris; e) surface and bottom temperature and salinity data using CTD; f) length, weight and maturity information using individual fish measurements, in support of the EU Data Regulation. 2. To collect acoustic data at two operating frequencies (38 kHz and 120 kHz) continuously throughout the cruise. Data recorded from the 38 kHz transducer will be combined with GOV trawl data and an estimate of total abundance made for groundfish species. This work will form part of a three year project (CATEFA) aimed at examining the relationships between trawl catches and acoustic data. 3. To calibrate the 38 kHz transducer. 4. To collect material for fish identification courses (T. Watson, CEFAS, Lowestoft). 5. To preserve material from diseased fish (S. Feist, CEFAS, Weymouth). 6. To collect fish white muscle and queen scallop tissue for stable isotope analysis, as part of an ongoing study on the effects of fishing in the North Sea (S. Jennings, FEFAS, Lowestoft). J7. To obtain ageing material and biological information from horse mackerel (Trachurus trachurus) from the southern North Sea (G. Eltink, RIVO, for the horse mackerel assessment working group). |
| Chief scientist | Trevor W Boon (Centre for Environment, Fisheries and Aquaculture Science Lowestoft Laboratory) |
| Project | International Bottom Trawl Surveys - North Sea |
| Coordinating body | ICES |
| Cruise report |  (0.17 MB) |
| Ocean/sea areas | |
| General | North Sea |
| Track charts | (0.08 MB) |
| Measurements | |
| Physical oceanography | |
| CTD stations | Quantity: number of stations = 67 Description: Micro CTD profiles |
| Chemical oceanography | |
| Radioactivity | Quantity: number of stations = 38 Description: Water samples (surface) analysed for caesium 137 |
| Biology and fisheries | |
| Pelagic fish | Quantity: number of stations = 75 Description: GOV trawl catches of all fish species |
| Demersal fish | Quantity: number of stations = 75 Description: GOV trawl catches of all fish species |