Cruise inventory

RV Corystes COR3/99

Cruise summary report

Cruise Info. 
Ship name (ship code)RV Corystes (74RY)
Cruise identifierCOR3/99
Cruise period1999-04-09 — 1999-04-26
StatusCompleted
Port of departureLowestoft, United Kingdom
Port of returnLowestoft, United Kingdom
PurposeResearch
Objectives1. To conduct a TV survey of the English NE coast Nephrops grounds using a towed sledge and underwater TV camera to evaluate burrow density and estimate Nephrops biomass in the area 55° 35' - 54° 45' N and 1° 30' - 0° 40' W.
2. To backup the TV survey with a trawl survey to establish the size composition and sex ratio of the Nephrops catch.
3. To collect sediment samples by Day grab to establish the type of substrate most suitable for Nephrops.
4. To deploy an Instrumented Buoy Mooring (AE004) in Outer Gabbard with J. Read (23-26 April).
Chief scientistClive G Brown (Centre for Environment, Fisheries and Aquaculture Science Lowestoft Laboratory)
Cruise reportRV Corystes COR3/99 cruise report co3_99.pdf — access key 'C' (0.09 MB) 
Ocean/sea areas 
GeneralNorth Sea
SpecificEnglish NE Coast
Measurements 
Physical oceanography 
Other physical oceanographic measurementsDescription: Instrumented buoy laid and a short programme of hourly, single depth (2m) niskin bottle casts was performed. Samples for salinity, suspended load, nutrients and chlorophyll were taken.
Chemical oceanography 
PhosphateDescription: Instrumented buoy laid and a short programme of hourly, single depth (2m) niskin bottle casts was performed. Samples for salinity, suspended load, nutrients and chlorophyll were taken.
NitrateDescription: Instrumented buoy laid and a short programme of hourly, single depth (2m) niskin bottle casts was performed. Samples for salinity, suspended load, nutrients and chlorophyll were taken.
Contamination 
Suspended matterDescription: Instrumented buoy laid and a short programme of hourly, single depth (2m) niskin bottle casts was performed. Samples for salinity, suspended load, nutrients and chlorophyll were taken.
Biology and fisheries 
Phytoplankton pigs (eg chlorophyll, fluorescence)Description: Instrumented buoy laid and a short programme of hourly, single depth (2m) niskin bottle casts was performed. Samples for salinity, suspended load, nutrients and chlorophyll were taken.
CrustaceansQuantity: number of hauls = 35
Description: of half hour duration using a Boris 600 prawn trawl to establish the size composition and sex ratio of Nephrops.
Geology and geophysics 
GrabDescription: sediment samples taken using Day grab frozen for future particle size analysis
Bottom photographyQuantity: number of stations = 105
Description: Underwater TV camera for Nephrops burrow counts made over a 10 minute part of the tow.