Survey report from the joint Norwegian/Russian Ecosystem Survey in the Barents Sea and the adjacent waters August- December 2022

• Main Authors: Johansen, Geir Odd, Trofimov, Alexander, Ingvaldsen, Randi Brunvær, Prokhorova, Tatiana, Grøsvik, Bjørn Einar, Krivosheya, Pavel, Bagøien, Espen, Lerch, Sarah Joanne, Prokopchuk, Irina, Eriksen, Elena, Husson, Berengere, Skaret, Georg, Johannesen, Edda, Bogstad, Bjarte, Windsland, Kristin, Höffle, Hannes, Wienerroither, Rupert, Hvingel, Carsten, Dolgov, Andrey, Hjelset, Ann Merete, Bakanev, Sergey, Stesko, Aleksei, Jørgensen, Lis Lindal, Øien, Nils Inge, Boehm, Frederike, Strelkova, Natalia, Blinova, Daria, Klepikovskiy, Roman, Fauchald, Per
• Other Authors: Prozorkevich, Dmitry, van der Meeren, Gro Ingleid
• Format: Report
• Language: English
• Published: Havforskningsinstituttet 2023
• Subjects: Barents Sea; Greenland; Norway; Svalbard; Barentshav*; Spitsbergen
• Online Access: https://hdl.handle.net/11250/3101537

The aim of the joint Norwegian/Russian ecosystem survey in the Barents Sea and adjacent waters, August-October (BESS) is to monitor the status and changes in the Barents Sea ecosystem and provide data to support stock advice and research. The survey has since 2004 been conducted annually in the autumn, as a collaboration between the Institute of Marine Research (IMR) in Norway and the Polar branch of the VNIRO (PINRO) in Russia. The general survey plan and tasks were agreed upon at the annual IMR-PINRO Meeting in March 2022. Ship routes and other technical details are agreed on by correspondence between the survey coordinators. BESS aims at covering the entire Barents Sea. Ecosystem stations are distributed in a 35×35 nautical mile regular grid, and the ship tracks follow this design. Exceptions are the area around Svalbard (Spitsbergen), some additional bottom trawl hauls for demersal fish survey indices estimation, and additional acoustic transects for the capelin stock size estimation. Survey start for the Russian vessel was significantly delayed, resulting in REEZ being covered two-three months later than NEEZ. This resulted in reduced area coverage, decrease in the numbers of trawl hauls, and lack of standard pelagic trawl sampling. In NEEZ, RV “Kronprins Haakon” was cancelled due to difficult economic situation, making it necessary to allocate one of the two remaining vessels to the area west and north of Svalbard (Spitsbergen). This resulted in low coverage in this area, and problems with synoptic coverage in north-east of Svalbard (Spitsbergen) and thus increased uncertainty in assessment of demersal fish (e.g. Greenland halibut) and capelin. The 19-th joint Barents Sea autumn Ecosystem Survey (BESS) was carried out in two periods. The Norwegian research vessels “G.O. Sars” and “Johan Hjort” covered NEEZ in the period 16-th August to 03-th October, providing data to stock assessment, 0-group fish abundance indices, and state and changes descriptions which is comparable with earlier survey years in NEEZ. ...