Marine_Scotland_FishDAC_1934 eng dataset Scottish Government (Marine Scotland) +44 (0)300 244 4000 marinescotland@gov.scot pointOfContact 2017-08-09 MEDIN Discovery Metadata Version 2.3.7 urn:ogc:def:crs:EPSG::4326 OGP Trials to Assess the Effects of Bobbin Groundgear and a 200 mm Square Mesh Panel to Reduce Unwanted By-Catches in the Commercial Nephrops Fishery Scottish Marine and Freshwater Science Vol 8 No 3 2017-06-15 publication Marine_Scotland_FishDAC_1934 The Gear Innovation and Technology Advisory Group (GITAG) funded trials to assess whether the unwanted by-catch of round and flatfish could be reduced in the Nephrops trawl fishery using a modified Nephrops trawl incorporating 200mm bobbins and a 200mm square mesh panel. Catches of Nephrops and monkfish remained consistent with that of a standard commercial Nephrops trawl. There were significant reductions in relative catch rates of cod and larger haddock (>25cm) and whiting (>28cm). There was no significant difference between the two trawls for haddock below 24cm and for whiting below 27cm. There was a significant reduction in the quantities of smaller common dab (<19cm) and long rough dab (<21cm) that were caught when using the modified trawl. However, significantly more larger plaice above 30cm were retained by the modified trawl. Scottish Government (Marine Scotland) +44 (0)300 244 4000 Mailpoint 11, Area 1B South, Victoria Quay Edinburgh EH6 6QQ United Kingdom marinescotland@gov.scot pointOfContact Scottish Government (Marine Scotland) +44 (0)300 244 4000 Mailpoint 11, Area 1B South, Victoria Quay Edinburgh EH6 6QQ United Kingdom marinescotland@gov.scot custodian Scottish Government (Marine Scotland) +44 (0)300 244 4000 Mailpoint 11, Area 1B South, Victoria Quay Edinburgh EH6 6QQ United Kingdom marinescotland@gov.scot distributor Marine Scotland +44 (0)300 244 4000 1B South, Victoria Quay Edinburgh EH6 6QQ United Kingdom marinescotland@gov.scot originator Not Planned Marine Environmental Data and Information Network Fisheries SeaDataNet Agreed Parameter Groups 2010-10-23 revision Fishing by-catch BODC Parameter Discovery Vocabulary 2011-03-25 revision Commercial fish and shellfish populations are healthy Marine Strategy Framework Directive descriptors 2010-11-11 revision Open Government License (http://www.nationalarchives.gov.uk/doc/open-government-licence/) otherRestrictions no limitations to public access 55000.00 eng biota -1.669922 3.251953 57.62188 59.26588 SeaDataNet vertical extent keywords 2010-01-01 revision The correct value is not known to, and not computable by, the sender of this data. However, a correct value probably exists. 2016-05-24 2016-05-31 https://dx.doi.org/10.7489/1934-1 DOI:https://dx.doi.org/10.7489/1934-1 http://dx/doi.org/10.7489/1934-1 download http://dx.doi.org/10.7489/1934-1 download http://dx.doi.org/10.7489/1934-1 download http://dx.doi.org/10.7489/1934-1 download http://dx.doi.org/10.7489/1934-1 download dataset The Zenith BF106, a 24.85m 500kW, twin rig stern trawler was chartered for the selectivity trials. The charter ran for 7 days from 24th to 31st of May 2016. Catch comparison trials, using the twin trawl method, were carried out on commercial fishing and Nephrops grounds 50 miles north of Fraserburgh in the North Sea (ICES area IVa). The species mix at the fishing grounds consisted of haddock, whiting, cod, a variety of flatfish and Nephrops.