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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
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© Thünen-Institut/D.Stepputtis
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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

  • EU - European Maritime, Fisheries and Aquaculture Fund of the European Union (EMFAF)
    (international, öffentlich)

Duration

Permanent task 1.2001 - 11.2027

More Information

Project status: ongoing

Publilcations

  1. 0

    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

  2. 1

    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

  3. 2

    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

  4. 3

    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

  5. 4

    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

  6. 5

    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

  7. 6

    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

  8. 7

    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

  9. 8

    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

  10. 9

    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

  11. 10

    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

  12. 11

    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

  13. 12

    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

  14. 13

    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

  15. 14

    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

  16. 15

    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

  17. 16

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

  18. 17

    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

  19. 18

    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

  20. 19

    Gröhsler T, Neuenfeldt S (2013) Exploration of new M values derived from SMS. In: Report of the benchmark workshop on Baltic multispecies assessments (WKBALT): 4-8 February 2013. Copenhagen: ICES, pp 332-344

  21. 20

    Gröhsler T (2013) Exploration of XSA settings. In: Report of the benchmark workshop on Baltic multispecies assessments (WKBALT): 4-8 February 2013. Copenhagen: ICES, pp 314-331

  22. 21

    Gröhsler T (2013) German herring and sprat fisheries & stock assessment data in the Baltic Sea in 2012. In: Report of the Baltic Fisheries Assessment Working Group (WGBFAS): 10-17 April 2013; Working Document 2. Copenhagen: ICES, pp 735-761

  23. 22

    Gröhsler T (2013) German herring fisheries & stock assessment data in the Western Baltic in 2012. In: Report of the Herring Assessment Working Group (HAWG) . Copenhagen: ICES, pp 806-818

  24. 23

    Gröhsler T, Oeberst R, Schaber M (2013) Implementation of the Stock Separation Function (SF) on German commercial landings. In: Report of the benchmark workshop on pelagic stocks (WKPELA): 4-8 February 2013. Copenhagen: ICES, pp 379-386

  25. 24

    Gröhsler T, Oeberst R, Schaber M (2013) Implementation of the stock separation function (SF) within GERAS in 2005-2011. Working Document WKPELA 1. Benchmark workshop on pelagic stocks (WKPELA): 4-8 February 2013. Copenhagen: ICES, 6 p

  26. 25

    Oeberst R, Gröhsler T, Schaber M (2013) Investigations on quality of Stock Separation Function (SF). Working Document WKPELA4. Benchmark workshop on pelagic stocks (WKPELA): 4-8 February 2013. Copenhagen: ICES, 22 p

  27. 26

    Bartolino V, Gröhsler T, Vitale F, Krischansson B, Johansson M (2013) Maturity at age in the WBSSH herring : motivation of the study and background. In: Report of the benchmark workshop on pelagic stocks (WKPELA): 4-8 February 2013. Copenhagen: ICES, pp 470-475

  28. 27

    Oeberst R, Gröhsler T (2013) Quality of age determination. Working Document WKPELA7. In Benchmark workshop on pelagic stocks (WKPELA), WBSSH 04-08 February 2013. Copenhagen: ICES, 3 p

  29. 28

    Krumme U, Gröhsler T (2013) Sprat (BS)/Central Baltic Herring (CBH): Analysis of the questionnaires concerning the issue of species misreportning 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

  30. 29

    Schaber M, Gröhsler T (2013) Survey Report for FRV "Solea" 2-21 October 2012. In: Report of the Baltic International Fish Survey Working Group (WGBIFS) : Annex 8: Cruise reports of acoustic surveys BASS and BIAS in 2012. Copenhagen: ICES, pp 266-289

  31. 30

    Oeberst R, Velasco A, Mieske B (2012) Measuring the international standard trawl for Baltic demersal surveys (TV3-520 Meshes) : working paper Working group of Baltic International Fish Survey, 26 – 30 March 2012. Copenhagen: ICES, 4 p

  32. 31

    Velasco A, Oeberst R (2012) Ungewöhnliche Gewichtsabnahme von Dorsch im 2. Jahresquartal im Bornholm Becken (ICES-Gebiet 25) und der Arkonasee (ICES-Gebiet 24). Inf Fischereiforsch 59:19-23, DOI:10.3220/Infn59_19-23_2012

    https://literatur.thuenen.de/digbib_extern/dn050368.pdf

  33. 32

    Velasco A (2010) Bericht über die 629. Reise des FFS "Solea" vom 28.10. bis zum 19.11.2010. 8 p

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