RV Cirolana CIR4/01
Cruise summary report
| Cruise Info. | |
| Ship name (ship code) | RV Cirolana (74CZ) |
| Cruise identifier | CIR4/01 |
| Cruise period | 2001-04-24 — 2001-05-20 |
| Status | Completed |
| Port of departure | Lowestoft, United Kingdom |
| Port of return | Lowestoft, United Kingdom |
| Purpose | Research |
| Objectives | Plankton survey for mackerel and horse mackerel eggs. Part of an ICES coordinated international survey conducted every 3 years to provide an estimate of spawning stock biomass for both mackerel and horse mackerel. Fishing to estimate fecundity and atresia of mackerel. |
| Chief scientist | Stephen Paul Milligan (Centre for Environment, Fisheries and Aquaculture Science Lowestoft Laboratory) |
| Project | ICES Tri-ennial Mackerel and Horse mackerel survey - WGMEGS |
| Coordinating body | ICES |
| Cruise report |  (0.08 MB) |
| Ocean/sea areas | |
| General | North Atlantic Ocean |
| Specific | Across the Continental Shelf from West of Ireland to Northern Biscay, including the Celtic Sea |
| Track charts | (0.06 MB) |
| Measurements | |
| Physical oceanography | |
| Surface measurements underway (T,S) | Description: Continuous measurement (every 10 mins) of surface (3m) salinity and temperature using a Chelsea instruments CTD |
| Subsurface temperature and salinity measurements | Quantity: number of stations = 150 Description: Double oblique tows with a GULF III type, high-speed plankton sampler, fitted with a 270 micro mesh net + CTD which continually logged temperature and salinity |
| Biology and fisheries | |
| Zooplankton | Quantity: number of stations = 150 Description: Double oblique tows with a GULF III type, high-speed plankton sampler, fitted with a 270 micro mesh net + CTD which continually logged temperature and salinity |
| Eggs and larvae | Quantity: number of stations = 150 Description: Double oblique tows with a GULF III type, high-speed plankton sampler, fitted with a 270 micro mesh net + CTD which continually logged temperature and salinity |
| Pelagic fish | Quantity: number of stations = 11 Description: Large peleagic FOTO trawl fished at the surface in the dark to capture populations of spawning mackerel |
| Pelagic fish | Quantity: number of stations = 9 Description: Rods, lines and feathers to catch mackerel alive for subsequent histological examination |
