Cruise inventory

RV Corystes COR8/92

Cruise summary report

Cruise Info. 
Ship name (ship code)RV Corystes (74RY)
Cruise identifierCOR8/92
Cruise period1992-06-26 — 1992-07-21
Port of departureLowestoft, United Kingdom
Port of returnLowestoft, United Kingdom
Objectives1. To carry out two plankton surveys using a 53cm high speed tow net fitted with the Guildline CTD monitoring system to:
a) locate a patch of crab (Cancer pagurus) larvae in unstratified water in the eastern English Channel
b) locate a patch of crab larvae in stratified water in the western English Channel.
2. To study the vertical distribution of crab larvae in both areas using the LHPR sampler.
3. To obtain stock indices of abundance for pre-recruits and fishable scallops on standard survey grids in the western English Channel, using dredges and underwater cameras.
4. To collect samples from scallop grounds in the eastern English Channel for ageing studies.
5. To test modifications to the underwater sledge.
6. To do a trial survey of the sea bed sediments using the Rox Ann system and underwater camera sledge.
7. To test a new dredge for sampling off-shore clam populations.
8. To continuously monitor the chlorophyll 'a' fluorescence temperature and salinity of sub-surface sea water.
9. To take discrete sub-surface sea water samples for salinity determination at each plankton station and throughout the working area.
10. To collect specimens of molluscs for the Conchological Society and English Heritage.
Chief scientistBrenda M Thompson (Ministry of Agriculture, Fisheries and Food Lowestoft Fisheries Laboratory)
Cruise reportRV Corystes COR8/92 cruise report co8_92.pdf — access key 'C' (0.14 MB) 
Ocean/sea areas 
GeneralEnglish Channel
SpecificEnglish Channel
Track chartsRV Corystes COR8/92 cruise track — trk3811.html
Physical oceanography 
Surface measurements underway (T,S)Quantity: activity duration in days = 25
Description: continuous T & S
Water bottle stationsQuantity: number of stations = 80
Description: surface S only
CTD stationsQuantity: number of stations = 60
Optics (eg underwater light levels)Quantity: activity duration in days = 25
Description: continous light measurements.
Biology and fisheries 
Phytoplankton pigs (eg chlorophyll, fluorescence)Quantity: activity duration in days = 25
Description: continuous fluorescence
PhytoplanktonQuantity: number of stations = 60
ZooplanktonQuantity: number of stations = 60
MolluscsQuantity: number of stations = 113
Description: scallop dredge stations.
Geology and geophysics 
GrabQuantity: number of samples = 30
Other geological/geophysical measurementsQuantity: number of image series = 18
Description: video of seabed type