FRV Clupea 7/68
Cruise summary report
| Cruise Info. | |
| Ship name (ship code) | FRV Clupea (74CU) |
| Cruise identifier | 7/68 |
| Cruise period | 1968-07-01 — 1968-07-20 |
| Status | Completed |
| Port of departure | Buckie, United Kingdom |
| Port of return | Buckie, United Kingdom |
| Purpose | Fisheries |
| Objectives | 1. To carry out an echo-sounding survey off south-east Shetlands in order to estimate the abundance and distribution of herring shoals.
2. To obtain plankton samples from the same area for the Scottish Marine Biological Association at Edinburgh. |
| Chief scientist | John A Urquhart (Department of Agriculture and Fisheries for Scotland Aberdeen Marine Laboratory) |
| Cruise report |  (0.05 MB) |
| Ocean/sea areas | |
| General | North Sea |
| Specific | Shetlands |
| Measurements | |
| Biology and fisheries | |
| Seston | Quantity: activity duration in days = 14 Description: During the echo search, plankton samples were taken with a plankton indicator every hour from 6pm (B.S.T) to 6am (B.S.T) |
| Pelagic fish | Quantity: activity duration in days = 14 Description: An echo search plan was carried out in the second and thrid week |
| Acoustic reflection on marine organisms. | Quantity: activity duration in days = 14 Description: An echo search plan was carried out in the second and thrid week |
