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

Cruise inventory

RV Corella 8/76

Cruise summary report

Cruise Info. 
Ship name (ship code)RV Corella (74CX)
Cruise identifier8/76
Cruise period1976-05-27 — 1976-06-06
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 the phytoplankton using the Lowestoft Multi-purpose plankton sampler. Including replicate hauls for variance estimates.
2. Monitor sub-surface water continuously along the ship's track 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 the phytoplankton contribution to chlorophyll 'a' fluorescence, including the preparation of slides for electron microscope examination of the micro flagellates.
4. Carry out hauls with the 2 sq m Lowestoft frame trawl to sample young fish.
5. Use the changing net sampler to investigate the vertical distribution of fish larvae and other zooplankton, alternating with water bottle casts for phytoplankton, chlorophyll 'a' and phaeophytin in relation to temperature and light penetration in the water column over a 26-hour period.
6. Collect samples of fish for stomach content analysis, using the young gadoid midwater trawl.
7. To continue estimating sampling variation by carrying out replicate hauls and replicate grids with the multi-purpose plankton sampler.
8. Collect live plankton as required.
9. Collect fish samples (frozen) for metal analysis.
Chief scientistJohn H Nichols (Ministry of Agriculture, Fisheries and Food Lowestoft Fisheries Laboratory)
Cruise reportRV Corella 8/76 cruise report corella08_76.pdf — access key 'C' (0.30 MB) 
Ocean/sea areas 
GeneralNorth Sea
Track chartsRV Corella 8/76 cruise track — trk1735.html
Physical oceanography 
Surface measurements underway (T,S)Quantity: track kilometres = 2114
Description: (survey grid)
Water bottle stationsQuantity: number of stations = 4
Description: 93 S surface 93 surface, ICES
Transparency (eg transmissometer)Quantity: track kilometres = 2114.984
Description: (survey grid)
Optics (eg underwater light levels)Quantity: number of profiles = 6
Description: (spectral radiometer)
Surface drifters/drifting buoysQuantity: number of deployments = 800
Description: bottom
Other physical oceanographic measurementsQuantity: number of observations = 131
Description: sea and swell
Chemical oceanography 
OxygenQuantity: track kilometres = 2114.984
Description: (survey grid)
PhosphateQuantity: number of samples = 93
NitrateQuantity: number of samples = 93
NitriteQuantity: number of samples = 93
SilicateQuantity: number of samples = 93
pHQuantity: track kilometres = 2114.984
Description: (survey grid)
Biology and fisheries 
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: track kilometres = 2114.984
Description: (survey grid)
PhytoplanktonQuantity: number of samples = 93
ZooplanktonQuantity: number of samples = 100
Eggs and larvaeQuantity: number of samples = 100
Description: survey:taxonomy etc.
Pelagic fishQuantity: number of hauls = 16
Incident radiationQuantity: activity duration in days = 10
Description: (solarimeter)