RV Clione CLI11B/87
Cruise summary report
|Ship name (ship code)||RV Clione (74CN)|
|Cruise period||1987-08-25 — 1987-09-07|
|Port of departure||Lowestoft, United Kingdom|
|Port of return||Lowestoft, United Kingdom|
|Objectives||1. To carry out an acoustic survey for spawning herring concentrations off the north east coast of England, concentrating on the Yorkshire coast grounds. This will involve the use of a towed body fitted with a 38 kHz transducer, and Simrad echo-integration equipment.
2. To obtain biological samples of herring using a pelagic trawl for age, maturity and fecundity studies.
3. To collect samples of spawning herring for lipid studies, involving preservation of eyes and portions of ovaries (University of Bergen).
4. To follow through the aggregation, spawning and dispersal phases of individual spawning concentrations using acoustic methods supplemented by underwater TV/camera sled observations. CTD observations will also be made on the spawning grounds.
|Chief scientist||P O Johnson (Ministry of Agriculture, Fisheries and Food Lowestoft Fisheries Laboratory)|
|Cruise report||(0.10 MB)|
|Specific||W. Central N. Sea|
|Water bottle stations||Description: A limited number of temperature and salinity observations were made with the CTD unit and water bottle sampler on spawning sites.|
|CTD stations||Description: A limited number of temperature and salinity observations were made with the CTD unit and water bottle sampler on spawning sites.|
|Other physical oceanographic measurements||Quantity: track kilometres = 2529.832|
Description: acoustic stations
|Biology and fisheries|
|Pelagic fish||Quantity: number of hauls = 13|
Description: Engel pelagic trawl hauls made for herring.
|Acoustic reflection on marine organisms.||Quantity: track kilometres = 2529.832|
Description: acoustically integrated using the Simrad QMII and QD systems