Report of the International Bottom Trawl Survey Working Group (IBTSWG). 19 - 23 March 2018 Oranmore, Ireland
|Contributor(s)||Sell Anne, Auber Arnaud, Bland Barbara, Lynam Christopher, Stokes David, Foucher Eric, Olsen Erik, Burns Finlay, Baldo Francisco, Velasco Francisco, Travers-Trolet Morgane, Jourdain Natoya, Schuchert Pia, Van Hal Ralf, Kynoch Robert, Soni Vaishav|
The report summarizes the national contributions in 2017–2018 and planning for 2018–2019 for the surveys coordinated by the International Bottom Trawl Survey Working Group (IBTSWG). In the North Sea, the surveys are performed in quarters 1 and 3 while in the Northeast Atlantic the surveys are conducted in quarters 1, 3, and 4 with a suite of 14 national surveys covering shelf areas from north off Scotland to the Gulf of Cádiz. Results achieved during the 3 year cycle are briefly summarized or reference to previ-ous reports is given.
North Sea Q1, 2018: Seven countries using six different vessels participated and per-formed 364 valid GOV hauls and 567 valid MIK hauls in the period between 17th Jan-uary and 28th February. All rectangles were covered by at least 1 GOV haul. There were, however, a number of rectangles, which could not be sampled with the MIK due to technical problems with the Scottish and the German vessel. Consequently, 8 rectan-gles in the northwest of the survey area weren’t sampled at all. This was managed despite poor weather conditions, and required some shifts in stations between coun-tries. In particular, Norway and Denmark did some additional GOV and MIK in rec-tangles, which had originally been allocated to Germany. Denmark and Sweden used both “DANA” and France used “Tridens” for a few days because “Thalassa” was not available in the beginning of the survey. As usual, all countries used their own survey gear. Overall, most of the countries reported small to very small catches with the GOV.