RV Cirolana CIR4/83
Cruise summary report
|Ship name (ship code)||RV Cirolana (74CZ)|
|Cruise period||1983-03-16 — 1983-04-12|
|Port of departure||Grimsby, United Kingdom|
|Port of return||Grimsby, United Kingdom|
|Objectives||1. To conduct a plankton survey of the area to assess the abundance of mackerel eggs.
2. To sample mackerel on the spawning grounds using either bottom or midwater trawls, and to sample other groundfish from the bottom trawl.
3. To use the 2m neuston net to sample mackerel larvae at the surface.
4. To rendezvous with the FRV ANTON DOHRN and do comparative hauls between the Lowestoft 53cm samplers and the nackthai net.
5. To take surface water samples for shipboard analysis of chlorophyll 'a' and phaeophytins.
6. To test run the software package for data logging all sensors on the plankton sampler Guildline and to develop programmes as requied for data handling.
7. To obtain fertile eggs of Microchirus variegatus and to rear them at a relevant range of temperature and observe development.
|Chief scientist||John H Nichols (Ministry of Agriculture, Fisheries and Food Lowestoft Fisheries Laboratory)|
|Project||Mackerel Egg Survey|
|Cruise report||(0.33 MB)|
|General||Bay of Biscay|
North East Atlantic Ocean (limit 40W)
|Water bottle stations||Quantity: number of stations = 3|
Description: 110 S surface - see MAFF Fisheries Research Data Report No 17, 1989
|CTD stations||Quantity: number of stations = 110|
|Biology and fisheries|
|Phytoplankton pigs (eg chlorophyll, fluorescence)|
|Phytoplankton||Quantity: number of stations = 110|
|Zooplankton||Quantity: number of stations = 110|
|Neuston||Quantity: number of hauls = 22|
Description: half hour trawls.
|Pelagic fish||Quantity: number of hauls = 2|
|Demersal fish||Quantity: number of hauls = 9|