Cruise inventory

RV Corella 13/76

Cruise summary report

Cruise Info. 
Ship name (ship code)RV Corella (74CX)
Cruise identifier13/76
Cruise period1976-09-28 — 1976-10-10
Port of departureLowestoft, United Kingdom
Port of returnLowestoft, United Kingdom
Objectives1. To carry out a survey for herring larvae in the western half of the central North Sea, as part of an international surevy of the abundance and distribution of autumn-spawned herring larvae in the North Sea and adjacent waters, using the Lowestoft multi-purpose plankton sampler.
2. To investigate the abundance and distribution of planktonic fish eggs and larvae, zooplankton predators and competitors and the phytoplankton.
3. Monitor sub-surface water continuously along the ship's track for temperature, salinity, transparency and chlorophyll 'a'.
4. Collect water samples from the pump for salinity and nutrient analysis; calibrate the fluoromoeter 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.
5. Carry out hauls with the 2 sq m Lowestoft frame trawl to sample young fish.
6. Carry out hauls with the 2 m diameter ring net within 10 miles of the coast, to sample lobster larvae.
7. Use the changing net sampler to investigate the vertical distribution ofherring larvae and other zooplankton.
8. Continue estimating sampling variance by carrying out replicate hauls with the multi-pupose plankton sampler.
9. Collect live plankton as required.
10. To release 700 sea bed drifters at 14 standard stations on the plankton survey grid.
Chief scientistC Timothy Macer (Ministry of Agriculture, Fisheries and Food Lowestoft Fisheries Laboratory)
Cruise reportRV Corella 13/76 cruise report corella13_76.pdf — access key 'C' (0.21 MB) 
Ocean/sea areas 
GeneralNorth Sea
Track chartsRV Corella 13/76 cruise track — trk1741.html
Physical oceanography 
Surface measurements underway (T,S)Quantity: track kilometres = 3657
Water bottle stationsQuantity: number of stations = 130
Description: surface only
Transparency (eg transmissometer)Quantity: track kilometres = 3657.7
Optics (eg underwater light levels)Quantity: number of profiles = 1
Surface drifters/drifting buoysQuantity: number of deployments = 700
Description: bottom
Other physical oceanographic measurementsQuantity: number of observations = 165
Description: sea and swell
Chemical oceanography 
OxygenQuantity: track kilometres = 3657.7
PhosphateQuantity: number of samples = 78
NitrateQuantity: number of samples = 78
NitriteQuantity: number of samples = 78
SilicateQuantity: number of samples = 78
pHQuantity: track kilometres = 3657.7
Biology and fisheries 
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: track kilometres = 3657.7
PhytoplanktonQuantity: number of samples = 130
ZooplanktonQuantity: number of samples = 130
Eggs and larvaeQuantity: number of samples = 130
Description: survey:taxonomy etc.
Pelagic fishQuantity: number of samples = 28
Incident radiationQuantity: activity duration in days = 13