Cruise inventory

RV Corystes COR3/01

Cruise summary report

Cruise Info. 
Ship name (ship code)RV Corystes (74RY)
Cruise identifierCOR3/01
Cruise period2001-04-05 — 2001-04-18
StatusCompleted
Port of departureLowestoft, United Kingdom
Port of returnLowestoft, United Kingdom
PurposeResearch
ObjectivesThe aims of this cruise were (1) to identify species that are vulnerable to beam trawling disturbance, (2) to describe the impacts of trawling disturbance on the structure and productivity of benthic communities and (3) to examine links between the frequency of trawl tracks in the Silver Pit and satellite and overflight records of trawling activity.
The specific aims of the cruise were:
1. To sample infaunal invertebrates at a series of sites in the Silver Pit that are subject to different levels of trawling disturbance.
2. To survey sites in the Silver Pit with side-scan sonar in an attempt to locate trawl tracks, and to correlate the presence of these tracks with records of trawling activity from other sources (satellite and overflight data).
3. To assess the persistence of trawl tracks on the seabed (subject to beam trawlers working in the Silver Pit area at the time of the cruise).
4. To sample epifauna and fish in the Silver Pit and Hills regions with the 2m beam trawl.
5. To sample epifauna and fish in the Silver Pit and Hills region with the 4m beam trawl.
6. To collect fish and benthic invertebrate species for stable isotope analysis.
7. To collect zooplankton for stable isotope analysis.
8. To collect dabs for bass feeding experiments (C Sweeting).
Chief scientistSimon Jennings (Centre for Environment, Fisheries and Aquaculture Science Lowestoft Laboratory)
Cruise reportRV Corystes COR3/01 cruise report cory3_01.pdf — access key 'C' (0.01 MB) 
Ocean/sea areas 
GeneralNorth Sea
SpecificSilver Pit, Dogger Bank, Hills
Measurements 
Biology and fisheries 
ZoobenthosQuantity: number of hauls = 20
Description: Beam trawl (2m) samples of epibenthos
ZoobenthosQuantity: number of cores = 190
Description: NIOZ cores to 30 cm depth to describe benthic infauna
ZoobenthosQuantity: number of hauls = 12
Description: Beam trawl (4m) samples of epibenthos
ZoobenthosQuantity: number of samples = 36
Description: Anchor dredge samples to describe benthic infauna
Demersal fishQuantity: number of hauls = 12
Description: Beam trawl (4m) samples of epibenthos
Demersal fishQuantity: number of hauls = 20
Description: Beam trawl (2m) samples of epibenthos
MolluscsQuantity: number of cores = 190
Description: NIOZ cores to 30 cm depth to describe benthic infauna
MolluscsQuantity: number of samples = 36
Description: Anchor dredge samples to describe benthic infauna
CrustaceansQuantity: number of samples = 36
Description: Anchor dredge samples to describe benthic infauna
CrustaceansQuantity: number of cores = 190
Description: NIOZ cores to 30 cm depth to describe benthic infauna
Geology and geophysics 
Long/short range side scan sonarQuantity: activity duration in hours = 30
Description: Sidescan images of Silver Pit seabed to identify trawl marks