RV Corystes COR9C/98

Cruise summary report

Cruise Info. 
Ship name (ship code)RV Corystes (74RY)
Cruise identifierCOR9C/98
Cruise period1998-09-30 — 1998-10-06
Port of departureLiverpool, United Kingdom
Port of returnLowestoft, United Kingdom
Objectives1. To conduct a TV survey of the English W Coast Irish sea Nephrops grounds using a towed sledge and underwater TV camera to evaluate burrow density and estimate Nephrops biomass in the area 53° 48' - 54° 39' N and 3° 22' - 3° 59' 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 retrieve CTD rosette lost during 9b part of the cruise.
5. To rendezvous with FV Royal Sovereign in the area of the Hastings Shingle Bank to investigate effects of dredging on crab pots being worked in the area.
Chief scientistClive G Brown (Centre for Environment, Fisheries and Aquaculture Science Lowestoft Laboratory)
Cruise reportRV Corystes COR9C/98 cruise report co9c_98.pdf (0.11 MB) 
Ocean/sea areas 
GeneralIrish Sea and St. George's Channel
SpecificIrish Sea east
Track chartsRV Corystes COR9C/98 cruise track — co9c_98trk.pdf (0.05 MB) 
Physical oceanography 
CTD stations
Biology and fisheries 
CrustaceansQuantity: number of hauls = 4
Description: made with the Boris 600 prawn trawl.
Geology and geophysics 
GrabDescription: sediment samples taken by Day grab,
Bottom photographyQuantity: number of deployments = 54
Description: with the sledge-mounted TV camera were made over the full extent of the Nephrops fishing grounds.