Cruise inventory

RV Corella 10/76

Cruise summary report

Cruise Info. 
Ship name (ship code)RV Corella (74CX)
Cruise identifier10/76
Cruise period1976-07-06 — 1976-07-18
Port of departureLowestoft, United Kingdom
Port of returnLowestoft, United Kingdom
Objectives1. Investigate distribution and abundance of planktonic fish eggs and larvae, zooplankton predators and competitors and the phytoplankton using the Lowestoft multipurpose 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 contributing to this fluorescence, including the preparation of slides for electron microscope analysis.
4. Carry out hauls with the 2 sq metre frame trawl for young fish over the same grid.
5. At selected stations sample the water very near the surface with a neuston net for lobster larvae.
6. Use the changing net sampler to investigate the vertical distribution of fish larvae and other zooplankton, alternating with water bottle casts for phytoplankton, chlorophyll and phaeophytin in relation to temperature and light penetration into the water column over a 26 hour period.
7. Collect samples of fish for stomach content analysis using the young gadoid trawl.
8. Collect samples of fish for heavy metal analysis.
9. Collect live plankton as required.
10. Service the 6 JONSIS current meter stations. At the Tyne station carry out a vertical series for temperature and salinity using standard water bottles and release 100 sea bed drifters.
11. Release 700 sea bed drifters at the 14 standard release points on the grid.
12. Collect a series of water samples off the Tees in the vicinity of the proposed I.C.I. dumping ground for M.E.P.2.
Chief scientistDerek Harding (Ministry of Agriculture, Fisheries and Food Lowestoft Fisheries Laboratory)
Cruise reportRV Corella 10/76 cruise report corella10_76.pdf — access key 'C' (0.33 MB) 
Ocean/sea areas 
GeneralNorth Sea
Track chartsRV Corella 10/76 cruise track — trk1737.html
Physical oceanography 
Surface measurements underway (T,S)Quantity: track kilometres = 1852
Water bottle stationsQuantity: number of stations = 2
Description: 100 surface
CTD stationsQuantity: number of stations = 100
Transparency (eg transmissometer)Quantity: track kilometres = 1852
Optics (eg underwater light levels)Quantity: number of profiles = 2
Surface drifters/drifting buoysQuantity: number of deployments = 800
Description: bottom
Other physical oceanographic measurementsQuantity: number of observations = 162
Description: sea and swell
Chemical oceanography 
OxygenQuantity: track kilometres = 1852
PhosphateQuantity: number of samples = 100
NitrateQuantity: number of samples = 109
NitriteQuantity: number of samples = 109
SilicateQuantity: number of samples = 100
pHQuantity: track kilometres = 1852
Description: )
Biology and fisheries 
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: track kilometres = 1852
PhytoplanktonQuantity: number of samples = 100
ZooplanktonQuantity: number of samples = 100
NeustonQuantity: number of hauls = 30
NektonQuantity: number of hauls = 20
Eggs and larvaeQuantity: number of samples = 100
Description: survey:biomass determination,communities etc.
Pelagic fishQuantity: number of hauls = 3
Incident radiationQuantity: activity duration in days = 13
Description: (solarimeter)