RV Cirolana CIR6/92
Cruise summary report
| Cruise Info. | |
| Ship name (ship code) | RV Cirolana (74CZ) |
| Cruise identifier | CIR6/92 |
| Cruise period | 1992-05-21 — 1992-06-15 |
| Status | Completed |
| Port of departure | Lowestoft, United Kingdom |
| Port of return | Lowestoft, United Kingdom |
| Purpose | Research |
| Objectives | 1. To participate in the international mackerel and horse mackerel egg survey of the western stocks, with responsibility for sampling coverage of the area from 48ºN to 52ºN.
2. To sample mackerel with the Danish Foto trawl and with handlines to determine levels of astresia in the female spawning stock. It was decided prior to the cruise that this task would be carried out by from the charter vessel Kings Cross. 3. To use the Danish Foto trawl to investigate the vertical distribution of spawning of mackerel. 4. To investigate the vertical distribution of mackerel egg production using the LHPR sampling system. 5. To measure the low molecular weight hydrocarbons from surface water over the whole egg survey area. Several problems were encountered on the cruise which prevented a full time sampling programme. |
| Chief scientist | John H Nichols (Ministry of Agriculture, Fisheries and Food Lowestoft Fisheries Laboratory) |
| Cruise report |  (0.24 MB) |
| Ocean/sea areas | |
| General | English Channel South East Atlantic Ocean (limit 20W) |
| Specific | Celtic Sea / Western Approaches |
| Track charts |  |
| Measurements | |
| Physical oceanography | |
| Surface measurements underway (T,S) | Quantity: activity duration in days = 25 Description: continuous surface chlorophyl |
| CTD stations | Quantity: number of stations = 132 Description: surface salinity only |
| Biology and fisheries | |
| Phytoplankton pigs (eg chlorophyll, fluorescence) | Quantity: number of stations = 97 |
| Phytoplankton | Quantity: number of stations = 132 Description: Made with the 53cm plankton sampler. |
| Zooplankton | Quantity: number of stations = 132 Description: Made with the 53cm plankton sampler. |
| Meteorology | |
| Other meteorological measurements | Quantity: activity duration in days = 25 Description: continuous irradiance |
