RV Corella 15/81
Cruise summary report
|Ship name (ship code)||RV Corella (74CX)|
|Cruise period||1981-12-01 — 1981-12-15|
|Port of departure||Lowestoft, United Kingdom|
|Port of return||Lowestoft, United Kingdom|
|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)|
|Specific||W. Channel (Lyme Bay)|
|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|