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Sökning: id:"swepub:oai:DiVA.org:his-11755" > Report of the Balti...

  • Bergenius, MikaelaSwedish University of Agricultural Sciences, Department of Aquatic Resources, Institute of Marine Research, Lysekil, Sweden (författare)

Report of the Baltic Fisheries Assessment Working Group (WGBFAS) : 14-21 April 2015, ICES HQ, Copenhagen, Denmark

  • BokEngelska2015

Förlag, utgivningsår, omfång ...

  • Copenhagen :International Council for the Exploration of the Sea,2015
  • 814 s.
  • printrdacarrier

Nummerbeteckningar

  • LIBRIS-ID:oai:DiVA.org:his-11755
  • https://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-11755URI

Kompletterande språkuppgifter

  • Språk:engelska
  • Sammanfattning på:engelska

Ingår i deldatabas

Klassifikation

  • Ämneskategori:vet swepub-contenttype
  • Ämneskategori:rap swepub-publicationtype

Serie

  • ICES CM ;2015/ACOM:10

Anmärkningar

  • The ICES Baltic Fisheries Assessment Working Group (WGBFAS) met 14-21 April 2015 (Chair: Mare Storr-Paulsen, Denmark), with 28 participants and 9 countries represented. The objective of WGBFAS was to assess the status of the following stocks:1 ) Sole in Division IIIa, SDs 20-222 ) Cod in Kattegat, Cod in SD 22-24, Cod in SD 25-323 ) Herring in SD 25-27, 28.2, 29 and 32, Herring in SD 28.1 (Gulf of Riga), Herring in SD 30, Herring SD 31.4 ) Sprat in SD 22-325 ) Plaice 21-23, Plaice 24256 ) Flounder 22-23; 24-25; 26+28 and 27+29-32, Brill 2232, Dab 2232, and Turbot 2232 (survey trends)WGBFAS also identified the data needed, for next year’s data call with some suggestions for improvements in the data call as well as in InterCatch. The report contains an introduction with the summary of other WGs relevant for the WGBFAS, country specific fishery description, the methods used, and ecosystem considerations. The results of the analytical stock assessment or survey trends for the species listed above are then presented with all the stocks with the same species in the same sections. The report ends with references, list of Working Documents, recommendations and Stock Annexes. In first quarter 2015 the Baltic cod stocks and the plaice stocks were benchmarked. As a result the Baltic cod stocks now have to apply a splitting key in SD 24 were both stocks are present. This has changed the assessment from being an area based assessment to now being a stock based assessments and has implications for the advice. The principle analytical models used for the stock assessments were XSA and SAM. For most flatfishes, CPUE trends from bottom trawl surveys were presented (except plaice 2425 and her31 using relative SSB from SAM and XSA, respectively). Ecosystem changes have been analytically considered in the following stock assessments: Herring in SD 25-27, 28.2, 29 and 32, and Sprat in SD 22-32, in form of cod predation mortality. Last year a very large retrospective pattern in the Eastern Baltic cod stock caused that the WG rejected the analytic assessment. Several uncertainties in the data lead to this conclusion i.a age reading problems with large inconsistency between and within nations as well as a change in growth and natural mortality. However, even though a data compilation workshop and a benchmark have been conducted in the intermediate time it was not possible to solve the main issue on growth. The lack of knowledge on growth caused to that even the length based data required in the data call was very uncertain for the models and in the end the WG was not able to produce a better model than was presented last year which is based on survey trends. The Her-30 (Herring in the Botnian Sea) was by the working group down scaled from a category 1 stock to a category 3 stock due to the commercial tuning fleet used in the assessment having very uncertain estimates in the last couples of years. However, during the Baltic ADG an alternative assessment was suggested were the stock is still considered a category 1 stock but the last 8 years of the commercial tuning fleet was terminated. This assessment was conducted after the working group but has been included in the report.

Ämnesord och genrebeteckningar

Biuppslag (personer, institutioner, konferenser, titlar ...)

  • Boje, JesperThe National Institute of Aquatic Resources Section for Fisheries Advice, Charlottenlund, Denmark (författare)
  • Casini, MicheleSwedish University of Agricultural Sciences, Department of Aquatic Resources, Institute of Marine Research, Lysekil, Sweden (författare)
  • Degel, HenrikThe National Institute of Aquatic Resources Section for Fisheries Advice, Charlottenlund, Denmark (författare)
  • Eero, MargitThe National Institute of Aquatic Resources Section for Management Systems, Charlottenlund, Denmark (författare)
  • Florin, Ann-BrittSwedish University of Agricultural Sciences, Department of Aquatic Resources, Institute of Coastal Research, Öregrund, Sweden (författare)
  • Gasyukov, PavelAtlantNIRO, Kaliningrad, Russian Federation (författare)
  • Grygiel, WlodzimierzSea Fisheries Institute, Gdynia, Poland (författare)
  • Gröhsler, TomasThünen Institute of Baltic Sea Fisheries (TI-OF), Rostock, Germany (författare)
  • Hjelm, JoakimSwedish University of Agricultural Sciences, Institute of Marine Research, Sweden (författare)
  • Horbowy, JanSea Fisheries Institute, Gdynia, Poland (författare)
  • Holmgren, NoélHögskolan i Skövde,Institutionen för biovetenskap,Forskningscentrum för Systembiologi,Ekologisk modellering, Ecological modeling(Swepub:his)holn (författare)
  • Norrström, NiclasHögskolan i Skövde,Institutionen för biovetenskap,Forskningscentrum för Systembiologi,Ekologisk modellering, Ecological modeling(Swepub:his)nori (författare)
  • Kaljuste, OlaviSwedish University of Agricultural Sciences, Department of Aquatic Resources, Institute of Coastal Research, Öregrund, Sweden (författare)
  • Karpushevskiy, IgorAtlantNIRO, Kaliningrad, Russian Federation (författare)
  • Karpushevskaia, AnastasiiaAtlantNIRO, Kaliningrad, Russian Federation (författare)
  • Kornilovs, GeorgsLatvian Fish Resources Agency, Riga, Latvia (författare)
  • Krumme, UweThünen Institute of Baltic Sea Fisheries (TI-OF), Rostock, Germany (författare)
  • Luzenczyk, AnnaNational Marine Fisheries Research Institute, Gdynia, Poland (författare)
  • Lövgren, JohanSwedish University of Agricultural Sciences, Department of Aquatic Resources, Institute of Marine Research, Lysekil, Sweden (författare)
  • Pönni, JukkaFinnish Game and Fisheries Research, Institute Kotka Unit, Kotka, Finland (författare)
  • Oeberst, RainerThünen Institute of Baltic Sea Fisheries (TI-OF), Rostock, Germany (författare)
  • Raid, TiitEstonian Marine Institute, University of Tartu, Tallinn, Estonia (författare)
  • Raitaniemi, JariFinnish Game and Fisheries Research Institute Turku Game and Fisheries Research, Turku, Finland (författare)
  • Statkus, RomasDivision of fishery research and science, Fishery service under Ministry of Agriculture, Klaipeda, Lithuania (författare)
  • Stoetera, SvenThünen Institute of Baltic Sea Fisheries (TI-OF), Rostock, Germany (författare)
  • Storr-Paulsen, MarieDTU Aqua - National Institute of Aquatic Resources Section for Fisheries Advice, Charlottenlund, Denmark (författare)
  • Ustups, DidzisInstitute of Food Safety, Animal Health and Environment (BIOR), Fish Resources Research Department, Riga, Latvia (författare)
  • Walther, YvonneSwedish University of Agricultural Sciences, Institute of Marine Research, Karlskrona, Sweden (författare)
  • Swedish University of Agricultural Sciences, Department of Aquatic Resources, Institute of Marine Research, Lysekil, SwedenThe National Institute of Aquatic Resources Section for Fisheries Advice, Charlottenlund, Denmark (creator_code:org_t)

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