CEFASbcbf829d-5811-4447-877b-b730ba6d54cd 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 2022-08-15T05:59:54 EPSG Geodetic Parameter Registry 2022-01-07 revision WGS 84 Net Grid Trials in the Farne Deeps Nephrops Trawl Fishery 2020-2021 - Fisheries Science Partnership Report 69 Net Grid Trials in the Farne Deeps Nephrops Trawl Fishery 2020-21 2022-08-15 publication 2022-08-15 revision 2022-01-21 creation CEFAS21407 https://data.cefas.co.uk Catch data (quantities and sizes by species) from trials of a selective Net Grid trawl. This work was carried out as part of the Fisheries Science Partnership (FSP) programme and continues previous studies conducted during 2019/20 (`https://data.cefas.co.uk/view/20927`_). The aim of this project was to further develop a selective Net Grid trawl with two cod ends to improve performance and enable skippers to better match their catch compositions to their quota allocations. The information from the trials will help skippers adapt to the Landing Obligation by avoiding unwanted fish in a fishery identified as having relatively high discard rates and will demonstrate to managers the level of selectivity improvement that is currently achievable to help formulate Discard Plans. This trial sought to collect catch data on an upper cod end construction designed to retain commercially sized fish and test the effect on the level of separation of fish between the upper and lower cod ends when using different mesh sizes (100mm vs 200mm) in the incline separation panel. Also examined was the effect of using artificial lights around inclined panel to assess the effect on the level of separation. At each station sampled, shot and haul, positional and times information were recorded, and for all species of fish length distribution data were taken. .. _`https://data.cefas.co.uk/view/20927`: https://data.cefas.co.uk/view/20927 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 notPlanned Fish Biota abundance, biomass and diversity Fisheries SeaDataNet P03 parameter discovery vocabulary 2011-03-25 revision Species distribution GEMET - INSPIRE themes, version 1.0 2008-06-01 publication Water column 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 **Publicly available data licensed under the Open Government Licence v3.0 (`https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/)`_ – Please note the applicable attribution statement is as follows: ‘includes Crown copyright, Cefas 2022'** .. _`https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/)`: https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/ English biota -2.00 0.00 54.50 55.25 2020-11-15 2020-12-03 Binary Unknown https://data.cefas.co.uk/view/21407 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: Binary download. 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 The trawler *LUC SN36 *was chartered to undertake trials in a *Nephrops * (*Nephrops norvegicus*) fishery on the selective Net Grid trawl. Sixteen days of fishing trials were conducted in the Farne Deeps (FU6: IVb; 38E8 and 39E8) fishing grounds off the North-East coast of England in November and December 2020. A total of 32 hauls were completed, with 30 valid for analyses. A fixed routine for handling and sorting the catch was maintained throughout the trials. Catches from the two cod ends were always kept separate. The net was drawn up to the vessel’s stern and the upper cod end emptied into boxes for processing. The lower cod-end was then delivered into the vessel’s hopper for processing. The crew sorted the catch as they would normally; with the exception that all material usually discarded was retained in baskets for sampling as the “discard fraction”. Processed wanted catch and unwanted catch from each cod end were kept separate till all quantities and details had been recorded. Cefas observers sampled using standard techniques. For each haul, all fish species caught were measured to the nearest cm below. Sub sampling was necessary on occasions when the fish catch was large, but sub samples reflected the total catch composition and raising factors were calculated. MEDIN 3.1.1