FRV Mara 9/69
Cruise summary report
| Cruise Info. | |
| Ship name (ship code) | FRV Mara (74MR) |
| Cruise identifier | 9/69 |
| Cruise period | 1969-08-04 — 1969-09-12 |
| Status | Completed |
| Port of departure | Buckie, United Kingdom |
| Purpose | Research |
| Objectives | 1) Observation and photography of the behaviour of round and flatfish during the process of seine netting
2) Observation and recording of the changes of shapes of the gear and sinking rates of the seine ropes 3) Underwater photometry for studies of underwater visibility in relation to fish behaviour 4) Underwater tagging during the second part of the trip 5) Surface studies were made of warp divergence and depression angles, and the speed of the gear through the water Onshore winds or fog prevented work on 7 working days of the cruise |
| Chief scientist | C C Hemmings (Department of Agriculture and Fisheries for Scotland Aberdeen Marine Laboratory) |
| Cruise report |  (0.11 MB) |
| Ocean/sea areas | |
| General | North Sea |
| Specific | Spey Bay, 'Bellings' Ground, NE of Buckie |
| Measurements | |
| Biology and fisheries | |
| Demersal fish | Quantity: number of specimens = 66 Description: Plaice. Released in the path of the net for study of recapture rates |
| Taggings | Quantity: number of specimens = 271 Description: Haddock from 9 hauls were tagged and released at a depth of approximately 12 fathoms |
| Gear research | Quantity: number of hauls = 57 Description: Seine shots. 44 commentries |
