FRV Clupea 1089C
Cruise summary report
|Ship name (ship code)||FRV Clupea (74CU)|
|Cruise period||1989-08-21 — 1989-09-08|
|Port of return||Aberdeen, United Kingdom|
|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)|
|Specific||off Rattray Head|
|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.|