Cruise inventory

RV Corella 4/76

Cruise summary report

Cruise Info. 
Ship name (ship code)RV Corella (74CX)
Cruise identifier4/76
Cruise period1976-03-08 — 1976-03-18
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 multipurpose plankton sampler.
2. Monitor the 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 Boothbay-net to sample young fish.
5. Use the changing net sampler to investigate vertical distribution
of fish eggs and larvae and the zooplankton, alternating with water
bottle casts for phytoplankton, chlorophyll 'a' and phaeophytin in
relation to temperature and light penetration into the water column over a 26 hour period.
6. Collect samples of fish for stomach content analysis using the
young gadoid trawl in midwater.
7. Collect live plankton and fish eggs as required.
Chief scientistGeoffrey P Arnold (Ministry of Agriculture, Fisheries and Food Lowestoft Fisheries Laboratory)
Cruise reportRV Corella 4/76 cruise report corella04_76.pdf — access key 'C' (0.23 MB) 
Ocean/sea areas 
GeneralNorth Sea
Track chartsRV Corella 4/76 cruise track — trk1731.html
Physical oceanography 
Surface measurements underway (T,S)Quantity: track kilometres = 2037
Water bottle stationsQuantity: number of stations = 88
Description: surface only
Transparency (eg transmissometer)Quantity: track kilometres = 2037.2
Optics (eg underwater light levels)Quantity: number of profiles = 1
Surface drifters/drifting buoysQuantity: number of deployments = 650
Description: bottom
Other physical oceanographic measurementsQuantity: number of observations = 97
Description: sea and swell
Chemical oceanography 
OxygenQuantity: track kilometres = 2037.2
PhosphateQuantity: number of samples = 88
NitrateQuantity: number of samples = 88
NitriteQuantity: number of samples = 88
SilicateQuantity: number of species = 88
pHQuantity: track kilometres = 2037.2
Biology and fisheries 
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: number of samples = 88
PhytoplanktonQuantity: number of samples = 88
ZooplanktonQuantity: number of samples = 93
Eggs and larvaeQuantity: number of samples = 93
Description: spatial and temporal distribution
Pelagic fishQuantity: number of hauls = 4
Description: spatial and temporal distribution
Incident radiationQuantity: activity duration in days = 10