Planned maintenance — 18th January 2018 12:00 to 22nd January 2018 09:00 [more]

Cruise inventory

RV Corella 2B/76

Cruise summary report

Cruise Info. 
Ship name (ship code)RV Corella (74CX)
Cruise identifier2B/76
Cruise period1976-01-28 — 1976-02-11
Port of departureLowestoft, United Kingdom
Port of returnLowestoft, United Kingdom
Objectives1. Investigate the distribution and abundance of planktonic fish eggs
and larvae, zooplankton predators and competitors and phytoplankton
using the Lowestoft multipurpose plankton sampler.
2. Monitor the sub-surface water continuously for temperature, salinity,
transparency and chlorophyll 'a'.
3. Collect water samples from the pump for salinity and nutrient analyses;
calibrate the fluorometer with chlorophyll 'a' extracts; measure
phaeophytin; and identify phytoplankton contribution to chlorophyll
'a' fluorescence, including the preparation of slides for electron
microscope examination of micro flagellates.
4. Carry out replicate hauls with the Multipurpose plankton sampler
near a parachute drogue to estimate sampling errors.
5. Test the possibility of carrying out alternate hauls with the high
speed plankton sampler and the Boothbay Net.
6. Collect samples with the changing net sampler to investigate vertical
distribution of fish eggs and larvae and zooplankton; alternating
with water bottle casts for phytoplankton, chlorophyll 'a' and
phaeophytin in relation to temperature and light penetration into
the water column over a 26 hours period.
7. Collect samples of fish for stomach content analysis using the
young gadoid trawl in mid-water.
8. Collect live plankton and fish eggs as required.
Chief scientistDerek Harding (Ministry of Agriculture, Fisheries and Food Lowestoft Fisheries Laboratory)
Cruise reportRV Corella 2B/76 cruise report corella02b_76.pdf — access key 'C' (0.28 MB) 
Ocean/sea areas 
GeneralNorth Sea
Track chartsRV Corella 2B/76 cruise track — trk1729.html
Physical oceanography 
Surface measurements underway (T,S)Quantity: track kilometres = 2129
Water bottle stationsQuantity: number of stations = 70
Description: surface only
Transparency (eg transmissometer)Quantity: track kilometres = 2129.8
Optics (eg underwater light levels)Quantity: number of profiles = 1
Surface drifters/drifting buoysQuantity: number of deployments = 700
Description: bottom
Chemical oceanography 
OxygenQuantity: track kilometres = 2129.8
PhosphateQuantity: number of stations = 70
NitrateQuantity: number of stations = 70
NitriteQuantity: number of stations = 70
SilicateQuantity: number of stations = 70
pHQuantity: track kilometres = 2129.8
Biology and fisheries 
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: track kilometres = 2129.8
PhytoplanktonQuantity: number of stations = 70
ZooplanktonQuantity: number of hauls = 75
Eggs and larvaeQuantity: number of hauls = 75
Description: distribution,biomass determination,communities
Pelagic fishQuantity: number of hauls = 3
Incident radiationQuantity: activity duration in days = 14