RV Corystes COR12/96
Cruise summary report
|Ship name (ship code)||RV Corystes (74RY)|
|Cruise period||1996-09-20 — 1996-10-04|
|Port of departure||Lowestoft, United Kingdom|
|Port of return||Lowestoft, United Kingdom|
|Objectives||1. To compare the effects of beam trawling and scallop dredging on the benthic community found at the experimental site off Anglesey (ref. 53º 25.5' N; 04º 01.5' W).
2. To photograph scavenging animals attracted to baited cameras on the seabed using various components of the by-catch as a measure of the response of non-target species to damaged or discarded fish and invertebrates from trawl catches.
3. To estimate with baited traps, the effects of predator exclusion by starfish and hermit crabs.
4. To disturb an area of Red Wharf Bay using a 4m beam trawl. Divers will be used to survey this line before and after fishing, operating from a shore based charter vessel.
5. To investigate benthic communities and fishing intensity at commercial fishing grounds in the English Channel and North Sea.
6. To undertake trials with a newly designed 2m beam trawl to assess its performance on different sediment types and efficiency of sampling different benthic communities.
7. To collect live invertebrate scavenger species for experimental feeding and behavioural studies at Conwy as part of an EC collaborative programme to measure how fishing activities my change biodiversity and abundance of the benthic invertebrate communities of the North Sea and Irish Sea.
All the aims were successfully completed.
|Chief scientist||Michel J Kaiser (Ministry of Agriculture, Fisheries and Food Conwy Laboratory)|
|Cruise report||(0.13 MB)|
Irish Sea and St. George's Channel
|Specific||Irish Sea, English Channel, North Sea|
|Biology and fisheries|
|Demersal fish||Quantity: number of stations = 20|
Description: trawl survey
|Demersal fish||Quantity: number of stations = 36|
Description: trawl survey & underwater photos
|Crustaceans||Quantity: number of stations = 20|
Description: scallop survey
|Geology and geophysics|
|Long/short range side scan sonar||Quantity: number of track lines = 6|
Description: six 2 mile legs