European Directory of Marine Environmental Data (EDMED)

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General
Data set name

Western English Channel offshore scallop surveys (1981-1996)

Data holding centreCentre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory
CountryUnited Kingdom  United Kingdom
Time periodFrom 1981 to 1982; 1984 to 1985; 1990 to 1996
OngoingNo
Geographical area

Western English Channel and Western Approaches

Observations 
Parameters

Sediment grain size parameters; Seabed photography; Sediment water content, porosity and surface area; Zoobenthos taxonomic abundance; Zoobenthos taxonomy-related counts

Instruments

Cameras; sediment grabs; rock dredges

Description 
Summary

Cruises in 1981-1982 with RV Corella were wide ranging dredge surveys of the whole western Channel while those of 1984-1985, using the chartered FV Harm Johannes, concentrated on the grounds between Plymouth and the Lizard out to 12 miles. Since 1990 annual surveys from RV Corystes in July-August have worked 32 of the stations set up in 1984, and since 1993 survey areas south of the Eddystone (25 stations) and in Lyme Bay (20 stations) have been added. Size and age frequency distributions are available for all stations. Some maturity data have also been collected. Underwater CCTV pictures from the survey areas from 1990-1993 are available on video tape, as are a large number of still photographs. ROXANN has been run throughout the survey since 1992 when the system was ground-truthed using a Day Grab. The 1990 and 1991 cruises included an exercise to compare the dredging performance of RV Corystes with commercial vessels. Samples of scallops for growth studies have been collected over a wide area of the Channel and Western Approaches to a depth of 175m.

OriginatorsCentre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory
References

Palmer, D.W. (1996) Surveys of Scallop Stocks in the Western Channel 1990-1996., CEFAS. Shellfish Resource Team Report.; Dare, P.J., Palmer, D.W., Howell, M.L. and Darby, C.D. (1996) Experiments to assess the relative dredging performances of research and commercial vessels for estimating the abundance of scallops (Pecten maximus) in the western English Channel fishery., MAFF Fisheries Research Technical Report, No. 96.

Data web sitehttp://www.cefas.co.uk/
Availability 
OrganisationCentre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory
AvailabilityLicence
ContactContracts Office, CEFAS, Lowestoft
Address

Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory
Pakefield Road
Lowestoft
Suffolk
NR33 OHT
United Kingdom

Telephone+44 1621 562244
Facsimile+44 (0)1502 513865
Administration 
Collating centreBritish Oceanographic Data Centre
Local identifier1029077
Global identifier459
Last revised2009-05-22