RV Corystes COR4/93
Cruise summary report
|Ship name (ship code)||RV Corystes (74RY)|
|Cruise period||1993-04-02 — 1993-04-19|
|Port of departure||Lowestoft, United Kingdom|
|Port of return||South Shields, United Kingdom|
|Objectives||1. To establish a short-term/long-term experimental site to measure the effect of fishing with a commercial 4m beam trawl fitted with chain mat on the sea bed and on commercial and non-commercial benthic species.
2. To beam trawl an area of the site using an experimental design to measure two levels of fishing intensity (x10 and x20) and frequency (fished only once and then x2 per year) relative to unfished controlled areas.
3. To measure food preference and movement of predators (using pots baited with different components of the by-catch and the benthos dredge) into an area fished with a beam trawl.
4. To observe feeding activity (from stomach contents) of dogfish (Scyliorhinus canicula) and gurnards (Triglidae) sampled before and after an interval of beam trawling.
5. To film predators attracted by a baited camera frame on the sea bed using various components of the by-catch.
6. To estimate the survival of animals caught in the cod-end using the on-board survival system over a prolonged period
|Chief scientist||B E Spencer (Ministry of Agriculture, Fisheries and Food Conwy Laboratory)|
|Cruise report||(0.41 MB)|
|General||Irish Sea and St. George's Channel|
|Specific||Irish Sea, East of Anglesey, Liverpool Bay|
|Biology and fisheries|
|Demersal fish||Quantity: number of hauls = 66|
|Geology and geophysics|
|Dredge||Quantity: number of deployments = 29|
|Grab||Quantity: number of samples = 83|
|Long/short range side scan sonar|
|Other geological/geophysical measurements||Description: sea bed composition using Roxanne|