Cruise inventory

RV Corella 6/76

Cruise summary report

Cruise Info. 
Ship name (ship code)RV Corella (74CX)
Cruise identifier6/76
Cruise period1976-04-23 — 1976-05-03
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 fluororneter 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 with 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 6/76 cruise report corella06_76.pdf — access key 'C' (0.32 MB) 
Ocean/sea areas 
GeneralNorth Sea
Track chartsRV Corella 6/76 cruise track — trk1733.html
Physical oceanography 
Surface measurements underway (T,S)Quantity: track kilometres = 1940
Water bottle stationsQuantity: number of stations = 5
Description: surface only; 86 T surface
Transparency (eg transmissometer)Quantity: track kilometres = 1940.896
Optics (eg underwater light levels)Quantity: number of profiles = 3
Description: (spectroradiometer)
Surface drifters/drifting buoysQuantity: number of deployments = 14
Description: bottom
Other physical oceanographic measurementsQuantity: number of observations = 118
Description: sea and swell
Chemical oceanography 
OxygenQuantity: track kilometres = 1940.896
PhosphateQuantity: number of samples = 91
NitrateQuantity: number of samples = 91
NitriteQuantity: number of samples = 91
SilicateQuantity: number of samples = 91
pHQuantity: track kilometres = 1940.896
Biology and fisheries 
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: track kilometres = 1940.896
PhytoplanktonQuantity: number of samples = 111
ZooplanktonQuantity: number of samples = 106
Eggs and larvaeQuantity: number of samples = 106
Description: survey:taxonomy
Pelagic fishQuantity: number of hauls = 12
Incident radiationQuantity: activity duration in days = 9
Description: (quanta meter,solarimeter)