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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 | ![]() |
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. |