RV Corella 15/81
Cruise summary report
| Cruise Info. | |
| Ship name (ship code) | RV Corella (74CX) |
| Cruise identifier | 15/81 |
| Cruise period | 1981-12-01 — 1981-12-15 |
| Status | Completed |
| Port of departure | Lowestoft, United Kingdom |
| Port of return | Lowestoft, United Kingdom |
| Purpose | Research |
| Objectives | 1. To carry out an acoustic survey for sprat within the western Channel between about 2-4ºW, offshore to 50ºN, concentrating on Lyme Bay.
2. To sample and identify any major pelagic shoal concentrations with a mid-water trawl and plot their distributions in finer detail. 3. To run a series of repeat surveys over the main areas of sprat concentration to estimate repeatability errors, particuarly day/night comparisons. 4. To carry out an in situ target strength measurements on sprat using the narrow beam transducer. |
| Chief scientist | P O Johnson (Ministry of Agriculture, Fisheries and Food Lowestoft Fisheries Laboratory) |
| Cruise report |  (0.16 MB) |
| Ocean/sea areas | |
| General | English Channel |
| Specific | W. Channel (Lyme Bay) |
| Track charts |  |
| Measurements | |
| Physical oceanography | |
| Surface measurements underway (T,S) | |
| CTD stations | Description: Guildluine CTD system run throughout the survey. |
| Biology and fisheries | |
| Pelagic fish | Quantity: number of hauls = 14 Description: hauls made with the pelagic Engel Trawl. |
| Acoustic reflection on marine organisms. | |
| Gear research | Description: SIMRAD QD integrator was tested during this cruise |
