FRV Clupea 7/70
Cruise summary report
| Cruise Info. | |
| Ship name (ship code) | FRV Clupea (74CU) |
| Cruise identifier | 7/70 |
| Cruise period | 1970-06-23 — 1970-07-09 |
| Status | Completed |
| Port of departure | Buckie, United Kingdom |
| Port of return | Buckie, United Kingdom |
| Objectives | To survey the North Sea area from the Scottish coast to 1° E and between 55° 30'N and 57° 30'N, using sonar and the fish echo counter, with associated fish sampling by pelagic trawl. All hauls contained a large number of medusae which comprised the bulk of the catch. |
| Chief scientist | Sinclair T Forbes (Department of Agriculture and Fisheries for Scotland Aberdeen Marine Laboratory) |
| Cruise report |  (0.13 MB) |
| Ocean/sea areas | |
| General | North Sea |
| Specific | Aberdeen Bay, Scurdy Ness, east of Bell Rock, off St Abb's Head, Burghead Bay |
| Measurements | |
| Biology and fisheries | |
| Pelagic fish | Quantity: number of hauls = 13 Description: 1-hour hauls using a midwater trawl with a 1/2 mesh codend. A net sounder was used with most of these to determine the depth of the net. Sprats were common in 2 hauls exclusively composed of 1-group fish. Herring were taken in 6 hauls, sandeels composed of 0-group and A. marinus were taken in all hauls |
| Demersal fish | Quantity: number of hauls = 13 Description: 1-hour hauls using a midwater trawl with a 1/2 mesh codend. A net sounder was used with most of these to determine the depth of the net. Haddock were taken in 9 hauls, saithe occurred in 7 hauls, 0-group T.esmarki in 5 hauls, whiting were rarely caught, and cod were also caught. 2 hauls contained T.minutus and another contained grey gurnards |
| Moorings, landers, buoys | |
| Geology and geophysics | |
| Long/short range side scan sonar | 57° 16' 59" N 1° 53' 59" W — Aberdeen Bay. Simrad SK3 sonar used in side scan mode and as an echosounder to count fish schools transerve to the ship's track. |
| Long/short range side scan sonar | 56° 38' 59" N 2° 15' 0" W — Scurdy Ness. Simrad SK3 sonar used in side scan mode and as an echosounder to count fish schools transerve to the ship's track. |
| Long/short range side scan sonar | 57° 0' 0" N 0° 15' 0" E — Additional Bottom traces seen. Simrad SK3 sonar used in side scan mode and as an echosounder to count fish schools transerve to the ship's track. |
| Long/short range side scan sonar | 56° 0' 0" N 2° 0' 0" W — St Abb's Head. Simrad SK3 sonar used in side scan mode and as an echosounder to count fish schools transerve to the ship's track. |
| Long/short range side scan sonar | 56° 22' 59" N 2° 12' 59" W — Bell Rock. Simrad SK3 sonar used in side scan mode and as an echosounder to count fish schools transerve to the ship's track. |
