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Institute of

OF Baltic Sea Fisheries

Project

From a fish sample to the stock assessment

Lead Institute OF Institute of Baltic Sea Fisheries
Involved Institutes SF Institute of Sea Fisheries
© Thünen-Institut/D.Stepputtis

DCF (Data Collection Framework): Stock assessment: Compilation of the national catch statistics and observer data as basis for stock assessments in ICES

Population models want to be fed with numbers of fish caught. However, at the landing site the fisher only report the landed weight, not the numbers of landed fish. Our expertise is to convert landing weights of the fisheries into numbers of herring or cod to provide the stock assessment models with the appropriate data feed.

Background and Objective

The Federal Republic of Germany is obliged to collect fisheries data based on the EU regulation 1543/2000 (Data Collection Framework, DCF). This includes the sampling of commercial fisheries, but also the recreational fisheries. In the Baltic Sea region the Thünen Institute of Batlic Sea Fisheries (OF) is responsible to collection the German data, to process them using fisheries biology standards and to transmit the data to the International Council for the Exploration of the Sea (ICES). In the Baltic Sea we collect data from fish stocks used by the German commercial fisheries including the species cod, herring, sprat, flounder, plaice, turbot, dab, salmon and sea trout.

Approach

The Federal Office of Agriculture and Food (BLE) is the national surveillance authority and regularly provides us with logbook data and landing slips. We merge this information with results from our biological sampling from the commercial fisheries. Observers have collected catch and length composition data on board of German commercial fishing vessels; and we analyse unsorted catch samples from the commercial fisheries. In addition, we sample the catches of the marine recreational fisheries.

Preliminary Results

Our quality-approved national fisheries data are regularly transmitted to data bases of ICES (InterCatch, RDBES). Expert groups involving mainly fisheries scientists use these data, e.g. for stock assessment purposes.

Thünen-Contact

Dr. Uwe Krumme

Telephone
+49 381 66099 148
uwe.krumme@thuenen.de
OF Institute of Baltic Sea Fisheries

Involved Thünen-Partners

Involved external Thünen-Partners

Funding Body

  • Federal Ministry of Food und Agriculture (BMEL)
    (national, öffentlich)
  • European Union (EU)
    (international, öffentlich)

Duration

Permanent task 1.2001 - 11.2027

More Information

Funding program: EMFAF - Europäischer Meeres-, Fischerei- und Aquakulturfonds
Project status: ongoing

Publilcations

  1. 0

    Krumme U, Funk S (2024) Biologie des Dorsches beziehungsweise Kabeljaus. In: Deutscher Angelfischerverband (ed) Fisch des Jahres 2024: Der Dorsch oder Kabeljau (Gadus morhua). Berlin: Deutscher Angelfischerverband eV, pp 33-37

  2. 1

    Höjesjö J, Walker A, Aarestrup K, Alexandre C, Artero C, Austad B, Bajinskis J, Bernas R, Berry M, Davidsen JG, Davidson I, Davison P, de Eyto E, Debowski P, Diserud O, Elliott S, Ensing D, Finstad B, Fitzgerald C, Weltersbach MS, et al (2024) Working Group to Develop and Test Assessment Methods for Sea Trout Populations (anadromous Salmo trutta) (Outputs from 2020-2023 Meetings) (WGTRUTTA). Copenhagen: ICES, iii, 29 p, ICES Sci Rep 6(88), DOI:10.17895/ices.pub.27169515

    https://literatur.thuenen.de/digbib_extern/dn068922.pdf

  3. 2

    Hommik K, Bergenius Nord M, Boje J, Brown E, Bukowski C, Cardinale M, Carlshamre S, Eero M, Gilljam D, Goni N, Haase S, Horbowy J, Kaljuste O, Krumme U, Lövgren J, Mirny Z, Neuenfeldt S, Pönni J, Putnis I, Stötera S, et al (2023) Baltic Fisheries Assessment Working Group (WGBFAS). Copenhagen: ICES, 606 p, ICES Sci Rep 5(58), DOI:10.17895/ices.pub.23123768

    https://literatur.thuenen.de/digbib_extern/dn066388.pdf

  4. 3

    Receveur A, Bleil M, Funk S, Stötera S, Gräwe U, Naumann M, Dutheil C, Krumme U (2022) Western Baltic cod in distress: decline in energy reserves since 1977. ICES J Mar Sci 79(4):1187-1201, DOI:10.1093/icesjms/fsac042

    https://literatur.thuenen.de/digbib_extern/dn064896.pdf

  5. 4

    Håkansson KB, Mugerza E, Adamowicz M, Basterretxea M, Canha A, Christman M, Clarke L, Cloatre T, Couperus B, Craig J, Demaneche S, Dubroca L, Egekvist J, Elson J, Fernandes AC, Gitarakos G, Glemarec G, Krumme U, Stötera S, Wischnewski J, et al (2022) Working Group on Commercial Catches (WGCATCH; outputs from 2020 meeting). Copenhagen: ICES, 95 p, ICES Sci Rep 4(26), DOI:10.17895/ices.pub.19367822

    https://literatur.thuenen.de/digbib_extern/dn064743.pdf

  6. 5

    Bergenius Nord M, Amosova V, Willestofte Berg C, Boje J, Brown E, Cardinale M, Carlshamre S, Eero M, Gilljam D, Gröhsler T, Gutkowska J, Haase S, Hommik K, Horbowy J, Hüssy K, Jounela P, Kaljuste O, Krumme U, Receveur A, Stötera S, et al (2021) Baltic Fisheries Assessment Working Group (WGBFAS). Copenhagen: ICES, 717 p, ICES Sci Rep 3(53), DOI:10.17895/ices.pub.8187

    https://literatur.thuenen.de/digbib_extern/dn063649.pdf

  7. 6

    Kokkalis A, Wall Andersen M, Willestofte Berg C, Cardinale M, Eero M, Funk S, Hommik K, Krumme U, Nielsen A, Bergenius Nord M, Storr-Paulsen M, Theodorsen T (2021) Inter-Benchmark Process on Western Baltic cod (IBPWEB). Copenhagen: ICES, 76 p, ICES Sci Rep 3(87), DOI:10.17895/ices.pub.5257

    https://literatur.thuenen.de/digbib_extern/dn063929.pdf

  8. 7

    Amosova V, Boje J, Brown E, Carlshamre S, Eero M, Gröhsler T, Gutkowska J, Haase S, Hommik K, Horbowy J, Jounela P, Kaljuste O, Karpushevskaia A, Krumme U, Lövgren J, Mirny Z, Neuenfeldt S, Schade FM, Stötera S, Strehlow HV, et al (2020) Baltic Fisheries Assessment Working Group (WGBFAS). Copenhagen: ICES, 643 p, ICES Sci Rep 2(45), DOI:10.17895/ices.pub.6024

  9. 8

    Carbonara P, Coad Davies J, Damme CJG van, Aanestad Godiksen J, Allegaert W, Beier U, Bekaert K, Canha A, Farias I, Follesa MC, Gault M, Gillespie-Mules R, Haase S, Hilvarsson A, Hüssy K, Korta M, Krüger-Johnsen M, Krumme U, Stransky C, Ulleweit J, et al (2020) Working Group on Biological Parameters (WGBIOP). Copenhagen: ICES, 150 p, ICES Sci Rep 2(117), DOI:10.17895/ices.pub.7651

  10. 9

    Amosova V, Berg C, Boje J, Cardinale M, Carlshamre S, Eero M, Gröhsler T, Gutkowska J, Hommik K, Horbowy J, Huwer B, Jounela P, Kaljuste O, Karpushevskiy I, Klinger R, Krumme U, Rodriguez-Tress P, Schade FM, Stötera S, Strehlow HV, et al (2019) Baltic Fisheries Assessment Working Group (WGBFAS). Copenhagen: ICES, 653 p, ICES Sci Rep 1(20), DOI:10.17895/ices.pub.5256

  11. 10

    Gröhsler T, Schaber M (2014) Annex 6: Cruise reports from other acoustic surveys in the area : Annex 6a: Western Baltic acoustic survey ; Survey report for FRV "Solea" ; German Acoustic Autumn Survey (GERAS), 30 September 2013 - 19 October 2013. In: Report of the Working Group of International Pelagic Surveys (WGIPS) ; 20-24 January 2014. Copenhagen: ICES, pp 224-251

  12. 11

    Gröhsler T, Schaber M (2014) Survey Report for FRV "Solea" German Acoustic Autumn Survey (GERAS) 30 September 2013 - 19 October 2013. In: Report of the Baltic International Fish Survey Working Group (WGBIFS) : 24-28 March 2014 ; Gdynia, Poland. Copenhagen: ICES, pp 250-258

  13. 12

    Krumme U, Gröhsler T (2013) Analysis of the questionaires concerning the issue of species misreporting in the mixed pelagic fisheries in the Baltic Sea (sprat-herring mix). In: Report of the benchmark workshop on Baltic multispecies assessments (WKBALT): 4-8 February 2013. Copenhagen: ICES, pp 266-276

  14. 13

    Oeberst R, Gröhsler T, Schaber M, Larson N (2013) Applicability of the Separation Function (SF) in 2011 and 2012. In: Report of the Baltic International Fish Survey Working Group (WGBIFS) : 20-25 March 2013. Copenhagen: ICES, pp 399-405

  15. 14

    Oeberst R, Gröhsler T, Schaber M (2013) Applicability of the stock separation function (SF) on the first period of GERAS in 1994-2004. Working Document WKPELA2. Benchmark workshop on pelagic stocks (WKPELA): 4-8 February 2013. Copenhagen: ICES, 4 p

  16. 15

    Gröhsler T (2013) Assessment input database. In: Report of the benchmark workshop on pelagic stocks (WKPELA): 4-8 February 2013. Copenhagen: ICES, pp 417-437

  17. 16

    Oeberst R, Gröhsler T (2013) Comparison of stock indices based on GERAS estimated with the standard procedure and by the new proposed method : Working document Baltic International Fish Survey Working Group (WGBIFS) 20-25 March 2013. Copenhagen: ICES, 9 p

  18. 17

    Gröhsler T (2013) Die Lage der Fischbestände im Skagerak/Kattegat und in der Ostsee : Stand 27.08.2013. Copenhagen: ICES, 26 p

  19. 18

    Gröhsler T, Oeberst R, Schaber M, Larson N, Kornilovs G (2013) Discrimination of western Baltic spring-spawning and central Baltic herring (Clupea harengus L.) based on growth vs. natural tag information. ICES J Mar Sci 70(6):1108-1117, doi:19.1093/icesjms/fst064

  20. 19

    Gröhsler T, Neuenfeldt S (2013) Exploration of different assessment units. In: Report of the benchmark workshop on Baltic multispecies assessments (WKBALT): 4-8 February 2013. Copenhagen: ICES, pp 249-265

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