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

Cruise inventory

RV Corella 7/76

Cruise summary report

Cruise Info. 
Ship name (ship code)RV Corella (74CX)
Cruise identifier7/76
Cruise period1976-05-10 — 1976-05-20
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 a frame net 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. Collect live plankton as required.
8. Collect fish samples (frozen) for metal analysis.
Chief scientistDerek Harding (Ministry of Agriculture, Fisheries and Food Lowestoft Fisheries Laboratory)
Cruise reportRV Corella 7/76 cruise report corella07_76.pdf — access key 'C' (0.29 MB) 
Ocean/sea areas 
GeneralNorth Sea
Track chartsRV Corella 7/76 cruise track — trk1734.html
Physical oceanography 
Surface measurements underway (T,S)Quantity: track kilometres = 2222
Water bottle stationsQuantity: number of stations = 5
Description: 114 S surface 95 surface ICES
Transparency (eg transmissometer)Quantity: track kilometres = 2222.4
Optics (eg underwater light levels)Quantity: number of profiles = 3
Description: (spectral radiometer)
Surface drifters/drifting buoysQuantity: number of deployments = 800
Description: bottom
Other physical oceanographic measurementsQuantity: number of observations = 127
Description: sea and swell
Chemical oceanography 
OxygenQuantity: track kilometres = 2222.4
PhosphateQuantity: number of samples = 114
NitrateQuantity: number of samples = 114
NitriteQuantity: number of samples = 114
SilicateQuantity: number of samples = 105
pHQuantity: track kilometres = 2222.4
Biology and fisheries 
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: track kilometres = 2222.4
PhytoplanktonQuantity: number of samples = 93
ZooplanktonQuantity: number of samples = 93
Eggs and larvaeQuantity: number of samples = 93
Description: survey:taxonomy
Pelagic fishQuantity: number of hauls = 13
Incident radiationQuantity: track kilometres = 2222.4
Description: (solarimeter)