CEFAS76d581e1-7522-4da7-8a46-347012ed721f English dataset Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS) Cefas Lowestoft Laboratory Pakefield Road Lowestoft Suffolk NR33 0HT UK data.manager@cefas.co.uk pointOfContact 2024-07-12T12:57:19 EPSG Geodetic Parameter Registry 2022-01-07 revision WGS 84 Fladen experimental fishing impact recovery data 2015 - 2m Beam Trawl 2019-03-28 publication 2024-07-12 revision 2019-03-18 creation CEFAS19704 https://data.cefas.co.uk Total count and biomass in grams of taxa identified from 2m beam trawl samples of the seabed, with associated station information. Samples were collected using a 2m scientific beam trawl at sampling stations located within three experimental boxes (treatment boxes only) during a fishing impact recovery survey within the Fladen Grounds. Data were collected at three time points (before impact (time 0), immediately after impact (time 1) and 8 months after impact (time 2) during two research surveys on the RV Cefas Endeavour in April 2015 and November 2015. Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS) Cefas Lowestoft Laboratory Pakefield Road Lowestoft Suffolk NR33 0HT UK data.manager@cefas.co.uk originator Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS) Cefas Lowestoft Laboratory Pakefield Road Lowestoft Suffolk NR33 0HT UK data.manager@cefas.co.uk custodian Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS) Cefas Lowestoft Laboratory Pakefield Road Lowestoft Suffolk NR33 0HT UK data.manager@cefas.co.uk distributor Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS) data.manager@cefas.co.uk owner notPlanned Benthos GEMET, version 1.0 2008-06-01 publication Biota abundance, biomass and diversity SeaDataNet P03 parameter discovery vocabulary 2011-03-25 revision Species distribution GEMET - INSPIRE themes, version 1.0 2008-06-01 publication Sediment SeaVoX Vertical Co-ordinate Coverages 2010-05-18 revision Marine Environmental Data and Information Network MEDIN metadata record availability 2012-01-11 publication data.gov.uk MEDIN metadata record availability 2012-01-11 publication otherRestrictions noLimitations otherRestrictions Public data - no limitations to reuse English biota 0.00 0.50 58.00 58.25 2015-04-21 2015-12-03 Delimited Geographic Information System Unknown https://data.cefas.co.uk/view/19704 Cefas Data Portal download The Cefas Data Portal contains metadata records and data sets available to download and connect to in support of our commitment to open science. Data is available in the following formats: CSV, ESRI Shapefile. The data can also be accessed via the WFS and WMS protocols. dataset INSPIRE Data Specification on Species Distribution – Technical Guidelines 2013-12-10 publication false See the referenced specification Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services 2010-12-08 publication true See the referenced specification Three 2m scientific beam trawls, spaced a minimum of 16m apart, were collected a North South orientation against the tide in Treatment boxes only. The 2m beam trawl is designed to sample epibenthic megafauna and is comprised of a heavy-duty steel beam, and a 4mm knotless mesh liner is used in the cod-end to retain smaller organisms. The chain mat, which is used to prevent the collection of large boulders, was removed to prevent the net from filling with the soft sediment. Tow distance was measured from the time that the beam trawl settled on the seabed to the time that hauling of the trawl began. The amount of wire paid out was 3x the water depth. Tow speed was maintained between 0.5 and 1.0 knots (speed over ground). A GIS navigation system was used throughout fishing operations to log the position of the tow every 10 seconds. On surfacing, the net was cleaned by gently towing it behind the vessel before landing the catch on-board. The net was inspected to ensure there were no signs of gear damage before the cod-end was emptied directly into large fish boxes. The contents of the fish boxes were washed on a benthos sorting table (5mm mesh) before being sorted on a sheet-steel table. The catch was sorted into taxon/species and the individual weight for all taxa were recorded for all specimens. Hermit crabs were weighed without shells and highly numerous species were sub-sampled. This involved measuring the individual weights of one quarter of the species total weight and then the whole catch was then calculated by ‘raising’ the number and weight in the known sub-sample volume. Taxa were identified using standard reference texts and a photographic reference collection was produced to aid rapid identification. MEDIN 3.1.1