Fladen experimental fishing impact recovery data - 4m Beam Trawl
Summary
Total count and biomass in grams of taxa identified from 4m beam trawl samples of the seabed, with associated station information. Samples were collected from three experimental treatment boxes only using two 4m beam trawls in parallel to simulate commercial beam trawling operations during the first of two research surveys on the RV Cefas Endeavour in April 2015.
Categories
Keywords
N/A
Use limitation statement
There are no public access constraints to this data. Use of this data is subject to the licence identified.
Licence
Open Government LicenceAttribution statement
See Cefas Data Portal for details – link to dataset below.
Technical information
Update frequency
notPlanned
Lineage
The sampling gear consisted of a commercially rigged (1989 style) 4m beam trawl (measured between inside edges of shoes) fitted with a chain mat, flip-up ropes, and a 40mm cod-end liner. One hundred percent of all three Treatment boxes was trawled in North South tow lines, against the tide between Time 0 and Time 1 only. Tow distance was measured from the time that the beam trawl had settled on the seabed to the time that hauling of the trawl began. The amount of wire paid out was three times the water depth. Tow speed was maintained at 4 knots (speed over ground). A GIS navigation system was used throughout fishing operations to log the position of the tow every 5 seconds. On surfacing, the net was cleaned by being gently towed behind the vessel prior to landing the catch on-board. The total catch was sorted into taxon/species using up to date literature and the individual weight of all taxa were recorded for all specimens.
Spatial information
Coordinate reference system
N/A
Geographic extent
- Latitude from: 58 to 58.25
- Longitude from: 0 to 0.5
Metadata information
Language
English
Metadata identifier
5bfef73f-7d57-4b62-8dd3-9037639794d2
Published by
Centre for Environment, Fisheries & Aquaculture Science
Contact publisher
data.manager@cefas.gov.ukDataset reference dates
Creation date
18 March 2019
Revision date
17 May 2023
Publication date
04 April 2019
Period
- From: 21 April 2015
- To: 24 April 2015
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