CEFAScbde560c-ba55-4267-ad93-8ac8b89daaab 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 2024-07-12T12:56:33 EPSG Geodetic Parameter Registry 2022-01-07 revision WGS 84 Fladen experimental fishing impact recovery data - Seabed imagery analysis 2019-04-04 publication 2024-07-12 revision 2018-09-12 creation CEFAS19337 https://data.cefas.co.uk Total counts and derived abundance codes of individual taxa identified from video files & still photographs of the seabed and total counts of nephrops burrows identified from video files, with associated station information. The digital video and still photographs were acquired from cameras mounted on a camera sledge frame at sampling stations located within six experimental boxes (three treatments and three control) 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 Seabed photography SeaDataNet P02 parameter discovery vocabulary 2011-03-25 revision Benthos GEMET, version 1.0 2008-06-01 publication 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 2015-04-17 2015-11-27 Delimited Geographic Information System Unknown https://data.cefas.co.uk/view/19337 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 Two camera sledge tows were positioned diagonally across each of the six experimental boxes. The camera sledge system comprised a Kongsberg 208 video camera with still image capability. Illumination was provided by four high intensity LED lights and a dedicated flash unit. The camera was orientated to provide a forward oblique view of the seabed and was fitted with a four-spot (red) laser-scaling device which projected the corners of a 17cm x 17cm square along the axis of the lens onto the seabed. Set-up and operation followed the MESH ‘Recommended Operating Guidelines (ROG) for underwater video and photographic imaging techniques. A video overlay was used to provide station metadata, time and position (of the GPS antenna) in the recorded video image. The camera sledge was towed at ~ 0.3 knots and still images were captured at one-minute intervals. The position of the sledge was derived from a High Precision Acoustic Positioning (HiPAP) beacon which was continuously logging at 10 second intervals throughout the tow. Video and still photographs were analysed to identify the broadscale habitats within the video record, to provide abundance and the Marine Nature Conservation Review (MNCR) Abundance Scales (SACFOR) data on the species present and to quantify the number of nephrops burrows present. Identification of taxa was limited to a level that could be confidently achieved from the available image. Quality was managed through a quality control system in place by the contracting laboratory undertaking the seabed imagery processing and by Cefas. MEDIN 3.1.1