RV Corystes COR6/02
Cruise summary report
| Cruise Info. | |
| Ship name (ship code) | RV Corystes (74RY) |
| Cruise identifier | COR6/02 |
| Cruise period | 2002-05-28 — 2002-06-12 |
| Status | Completed |
| Port of departure | Lowestoft, United Kingdom |
| Port of return | Lowestoft, United Kingdom |
| Purpose | Research |
| Objectives | 1. To use acoustic and fishing survey methods to estimate the abundance and
distribution of sandeels on sandeel fishing grounds on the western Dogger Bank. 2. To use fishing survey methods to estimate the abundance and distribution of predatory fish feeding on sandeels on the sandeel fishing grounds on the western Dogger Bank. 3. To use QTC View to describe seabed sediment type in relation to sandeel distribution and abundance. 4. To carry out a shipboard experiment to determine gut evacuation rates of sandeels. 5. To recover, service and re-deploy the CEFAS data transmitting sonar buoy on the Indefatigable Bank. 6. To catch and tag cod with coded acoustic pingers and release them in the vicinity of the CEFAS data transmitting sonar buoy on the Indefatigable Bank in order to monitor their subsequent residence within the area. |
| Chief scientist | Julian David Metcalfe (Centre for Environment, Fisheries and Aquaculture Science Lowestoft Laboratory) |
| Cruise report |  (0.71 MB) |
| Ocean/sea areas | |
| General | North Sea |
| Measurements | |
| Physical oceanography | |
| CTD stations | Description: regularly along survey grid |
| Surface drifters/drifting buoys | Quantity: number of deployments = 1 Description: replacement data transmitting sonar buoy |
| Surface drifters/drifting buoys | Quantity: number of recoveries = 1 Description: sonar buoy |
| Biology and fisheries | |
| Phytoplankton | Description: plankton samples |
| Zooplankton | Description: plankton samples |
| Pelagic fish | Quantity: number of species = 26 Description: caught in trawls, including 71% dabs and 10.2% whiting |
| Pelagic fish | Quantity: number of hauls = 52 Description: Granton trawls for sandeel predators |
| Demersal fish | Quantity: number of hauls = 52 Description: Granton trawls for sandeel predators |
| Demersal fish | Quantity: number of species = 26 Description: caught in trawls, including 71% dabs and 10.2% whiting |
| Demersal fish | Quantity: number of specimens = 3921 Description: sandeels taken from 324 dredge tows |
| Taggings | Quantity: number of specimens = 9 Description: cod |
| Other biological/fisheries measurement | Description: sandeel samples frozen and returned to laboratory |
| Other biological/fisheries measurement | Quantity: number of samples = 20 Description: stomach contents of each major predator species in every haul examined |
| Geology and geophysics | |
| Multi-beam echosounding | Quantity: number of surveys = 11 Description: estimate sandeel abundance |
| Other geological/geophysical measurements | Description: QTC View and EK500 surveyed seabed sediment |
