Institute of

Baltic Sea Fisheries


Marie Austerhoff
Institut für Ostseefischerei

Alter Hafen Süd 2
18069 Rostock
Phone: +49 381 66099 102
Fax: +49 381 66099 199

Dr. Tomas Gröhsler

Dr. Tomas  Gröhsler
Alter Hafen Süd 2
18069 Rostock
+49 381 66099 104
+49 381 66099 199

Fields of activity

  • Coordination of fisheries research of pelagic fish species (e.g. herring and sprat) in the Baltic Sea
  • Active member of the ICES assessment working group on:

   - Herring Assessment WG for the Area South of 62° N (HAWG)
   - Baltic Fisheries Assessment WG (WGBFAS)

  • Contribution to: 

   - Baltic International Fisheries Surveys WG (WGBIFS)
   - Working Group of International Pelagic  Surveys (WGIPS, ehemals PGHERS/PGIPS)

Research interests

Assessment of fish stocks, Separation of fish stocks, ICES advice, German autumn acoustic survey (GERAS), data bases and analysis

Scientific background

2016-2018: Chair of the Baltic Fisheries Assessment Working Group (WGBFAS)

2008-2010: (Co-)Chair of the Herring Assessment Working South of 62° N (HAWG)

2004-2006: Chair of the Baltic Fisheries Assessment Working Group (WGBFAS)

2001-2006: Institute’s (and German alternate) representative at the Advisory Committee for Fisheries Management (ACFM)

Since 1994: Senior Scientist at the Thünen Insitute of Baltic Sea Fisheries in Rostock, Head of the pelagic WG, Participation in GERAS, Active member of the ICES: ‚Baltic Fisheries Assessment Working Group (WGBFAS) and ‚Herring Assessment Working Group for the Area South of 62° N (HAWG)‘

1991-1993: Scientist at the University of Hamburg, Analysis of haddock stomach contents within the ‘Stomach sampling Project 1991’ in the North Sea. 1991 Scientist at the Environment Office in Hamburg ‘ Reconstruction of small water areas in the city’

1987-1989: D. Sc. study financed by the ‘Deutsche Forschungsgemeinschaft (DFG) 1987-1992: D. Sc. study/ D. Sc. degree in April 1992/ D. Sc. thesis: Feeding Ecology of Antarctic Fish around Elephant Island with Emphasis on the Austral Winter.

1983-1987: Main study of biology in Kiel/Master of science (Diplom) in March 1987/ Master of science thesis: Feeding Biology of Dab in the Kiel Bay.

1979-1983: Basic study of biology in Hamburg/Bachelor (Vordiplom) in January 1983


Results 1 - 10 of 200

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  1. 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/
    pdf document (limited accessibility) 42137 kb
  2. Polte P, Gröhsler T, Kotterba P, Nordheim L von, Moll D, Santos J, Rodriguez-Tress P, Zablotski Y, Zimmermann C (2021) Reduced reproductive success of Western Baltic herring (Clupea harengus) as a response to warming winters. Front Mar Sci 8:589242, DOI:10.3389/fmars.2021.589242
    pdf document (limited accessibility) 3767 kb
  3. Polte P, Gröhsler T (2020) 2019 Western Baltic spring spawning herring recruitment monitored by the Rügen Herring Larvae Survey. ICES Sci Rep 2(60):1041-1043
  4. 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/
  5. Gröhsler T (2020) German herring & sprat : fisheries & stock assessment input data in the Baltic Sea in 2019. ICES Sci Rep 2(45):568-590
  6. Gröhsler T (2020) German herring fisheries & stock assessment data in the Western Baltic in 2019. ICES Sci Rep 2(60):1026-1040
  7. Bartolino V, Ball J, Berg F, Berges B, Campbell N, Damme CJG van, van Deurs M, Egan A, Gras M, Gröhsler T, Henriksen O, Hakansson KB, Hintzen N, Johnsen E, Kloppmann MHF, Kvamme C, Loots C, Lundy M, Maersk Lusseau S, Rohlf N, et al (2020) Herring Assessment Working Group for the Area South of 62° N (HAWG). Copenhagen: ICES, 1151 p, ICES Sci Rep 2(60), DOI:10.17895/
  8. Bogstad B, Bergenius M, Eero M, Fischer S, Gröhsler T, Horbowy J, Taylor MH (2020) Inter-Benchmark Process on Baltic Sprat (Sprattus sprattus) and Herring (Clupea harengus) (IBPBash). Copenhagen: ICES, 44 p, ICES Sci Rep 2(34), DOI:10.17895/
  9. Moyano M, Illing B, Polte P, Kotterba P, Zablotski Y, Gröhsler T, Hüdepohl P, Cooke SJ, Peck M (2020) Linking individual physiological indicators to the productivity of fish populations: A case study of Atlantic herring. Ecol Indic 113:106146, DOI:10.1016/j.ecolind.2020.106146
    pdf document (limited accessibility) 876 kb
  10. Schaber M, Gröhsler T (2020) Survey report for FRV "Solea" SB768: German Acoustic Autumn Survey (GERAS) 01 October - 21 October 2019. ICES Sci Rep 2(56):190-220

Results 1 - 10 of 200

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