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Report of the Baltic Fisheries AssessmentWorking Group (WGBFAS): 19-26 April 2017, Copenhagen, Denmark
SLU, Sweden.
DTU Aqua, Denmark.
Morski Instytut Rybacki, Poland.
DTU Aqua, Denmark.
Vise andre og tillknytning
2017 (engelsk)Rapport (Annet vitenskapelig)
Abstract [en]

The ICES Baltic Fisheries Assessment Working Group (WGBFAS) met 19-26 April 2017(Chair: Tomas Gröhsler, Germany and Co-chair: Michele Casini, Sweden), with 41 participants and 9 countries represented. The objective of WGBFAS was to assess the status of the following stocks: Sole in Division 3.a, SDs 20–24; Cod in Kattegat, Cod in SDs 22–24, Cod in SDs 25–32; Herring in SDs 25–27, 28.2, 29 and 32, Herring in SD 28.1 (Gulf of Riga), Herring in SDs 30-31 (Gulf of Bothnia); Sprat in SDs 22–32; Plaice in SDs 21–23, Plaice in SDs 24–25; Flounder in SDs 22–23, in SDs 24–25, in SDs 26+28 and SDs 27+29–32; Brill in SDs 22–32, Dab in SDs 22–32 and Turbot in SDs 22–32. WGBFAS also identified the data needed for next year’s data call with some suggestions for improvements in the data call, and stock-specific research needs.The report contains an introduction with the summary of other WGs relevant for the WGBFAS, 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, recommendations, links to Stock Annexes and list of Working Documents.The principle analytical models used for the stock assessments were XSA and SAM. For most flatfishes and cod in SDs 25–32 (data limited stocks), CPUE trends from bottomtrawl surveys were used in the assessment (except plaice in SDs 24–25 for which relative SSB from SAM was used). For the data limited stocks, reference points based on length-based indicators were estimated (except cod in SDs 25-32 for which relative reference points were estimated using the SPiCT model). For cod in SDs 25–32, intersessional work was planned to hopefully allow returning to an analytical stock assessment in the near future. 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.

sted, utgiver, år, opplag, sider
Copenhagen: International Council for the Exploration of the Sea , 2017.
Serie
ICES CM 2017/ACOM:11
HSV kategori
Forskningsprogram
Ekologisk modellering; INF502 Biomarkörer
Identifikatorer
URN: urn:nbn:se:his:diva-13959OAI: oai:DiVA.org:his-13959DiVA, id: diva2:1129792
Forskningsfinansiär
Swedish Research Council Formas, 2012-1330Tilgjengelig fra: 2017-08-07 Laget: 2017-08-07 Sist oppdatert: 2018-06-08bibliografisk kontrollert

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https://www.ices.dk/sites/pub/Publication%20Reports/Expert%20Group%20Report/acom/2017/WGBFAS/01%20WGBFAS%20Report%202017.pdf

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