Cruise inventory

RV Corystes COR4/94

Cruise summary report

Cruise Info. 
Ship name (ship code)RV Corystes (74RY)
Cruise identifierCOR4/94
Cruise period1994-04-07 — 1994-04-26
Port of departureLowestoft, United Kingdom
Port of returnLowestoft, United Kingdom
Objectives1. To survey the sea bed and sample benthos at the experimental site off Anglesey (ref. 53.25.539N; 04.01548W) fished intensively with a beam-trawl fitted with chain mat in October 1993.
2. To beam trawl and sample the experimental site along the four lines designated for frequent fishing disturbance (two times per year) using two intensities of fishing (x10 and x20 tows).
3. To estimate the survival of animals caught in the cod-end using the on-board survival system over a prolonged period.
4. To estimate presence and activity of predators over trawled tracks using diver observations.
5. To film predators attracted to a baited camera frame on the sea bed using various components of the by-catch.
6. To quantify the number of macroepibenthic animals moving onto trawled tracks by sampling with a 3m beam trawl.
7. To measure the survival of animals which pass through the mesh of the beam trawl.
8. To measure the variance of sampling with the benthos dredge.
Chief scientistB E Spencer (Ministry of Agriculture, Fisheries and Food Conwy Laboratory)
Cruise reportRV Corystes COR4/94 cruise report co4_94.pdf — access key 'C' (0.14 MB) 
Ocean/sea areas 
GeneralIrish Sea and St. George's Channel
SpecificIrish Sea
Track chartsRV Corystes COR4/94 cruise track — trk4028.html
Biology and fisheries 
PhytobenthosDescription: benthos survey on site fished intensively by beam trawl
Demersal fishQuantity: number of hauls = 107
Description: beam trawl tows.
Other biological/fisheries measurementDescription: diver observations for presence of predators
Geology and geophysics 
DredgeQuantity: number of deployments = 44
GrabQuantity: number of samples = 144
Description: experimental sites for effects. Surival experiments
Bottom photographyDescription: for predators attracted to a baited camera frame
Long/short range side scan sonarQuantity: number of deployments = 20