FRV Clupea 1089C
Cruise summary report
| Cruise Info. | |
| Ship name (ship code) | FRV Clupea (74CU) |
| Cruise identifier | 1089C |
| Cruise period | 1989-08-21 — 1989-09-08 |
| Status | Completed |
| Port of return | Aberdeen, United Kingdom |
| Purpose | Research |
| Objectives | 1. To investigate likely herring spawning areas in ICES areas IVa (west) and IVb (west) using a "Day" grab, the ROV "Sea-pup", a commercially available ROV and the sledge-mounted underwater TV system - in an attempt to pinpoint exact herring spawning locations.
2. To carry out TV and bottom substrate surveys in Oil Exploration Blocks 5/24, 5/25, 6/30 and 26/4 which lie in areas identified as extremely important herring spawning grounds. 3. To map and sample quantitatively the herring spawning ground discovered off Rattray Head in August/September 1988 and any other areas of egg deposition that are identified. 4. To assess the usefulness of a commercially available ROV for this type of work. 5. To carry out a limited amount of fishing to obtain biological samples of fish occurring on the spawning grounds. |
| Chief scientist | John A Morrison (Scottish Office Agriculture and Fisheries Department Aberdeen Marine Laboratory) |
| Cruise report |  (0.15 MB) |
| Ocean/sea areas | |
| General | North Sea |
| Specific | off Rattray Head |
| Measurements | |
| Biology and fisheries | |
| Eggs and larvae | Quantity: number of hauls = 2 Description: Dutch Gulf III deployed to collect samples of larvae. |
| Demersal fish | Description: Limited amount of fishing for herring. |
| Geology and geophysics | |
| Grab | Quantity: number of samples = 275 Description: grab samples to characterise bottom substrates observed on video. |
| Bottom photography | Description: Underwater TV to locate herring spawning grounds. |
