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Dr. Tomas Gröhsler

Institute of Baltic Sea Fisheries

Email
tomas.groehsler@thuenen.de

Retired since August1st, 2022

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

Projects

Involved in

ongoing projects

    completed projects

    • Herring data fish factory

    Publications

    1. 0

      Moll D, Polte P, Jochum KP, Gröhsler T, Bekkevold D, McQuinn IH, Möllmann C, Zimmermann C, Kotterba P (2025) Direct evidence of natal homing in an Atlantic herring metapopulation. Sci Adv 11(44):eadz6746, DOI:10.1126/sciadv.adz6746

      https://literatur.thuenen.de/digbib_extern/dn070280.pdf

    2. 1

      Moyano M, Illing B, Akimova A, Alter K, Bartolino V, Börner G, Clemmesen C, Finke A, Gröhsler T, Kotterba P, Livdane L, Mittermayer F, Moll D, Nordheim L von, Peck M, Schaber M, Polte P (2023) Caught in the middle: bottom-up and top-down processes impacting recruitment in a small pelagic fish. Rev Fish Biol Fisheries 33(1):55-84, DOI:10.1007/s11160-022-09739-2

      https://literatur.thuenen.de/digbib_extern/dn065680.pdf

    3. 2

      Bekkevold D, Berg F, Polte P, Bartolino V, Ojaveer H, Mosegaard H, Farrell ED, Fedotova E, Hemmer-Hansen J, Huwer B, Trijoulet V, Moesgaard Albertsen C, Fuentes-Pardo AP, Gröhsler T, Pettersson M, Jansen T, Folkvord A, Andersson L (2023) Mixed-stock analysis of Atlantic herring (Clupea harengus): a tool for identifying management units and complex migration dynamics. ICES J Mar Sci 88(1):173-184, DOI:10.1093/icesjms/fsac223

      https://literatur.thuenen.de/digbib_extern/dn065969.pdf

    4. 3

      Bergenius M, Hommik K, Berg CW, Boje J, Brown E, Carlshamre S, Eero M, Finke A, Gilljam D, Goni N, Gröhsler T, Gutkowska J, Haase S, Horbowy J, Kaljuste O, Krumme U, Lövgren J, Mirny Z, Neuenfeldt S, Stötera S, et al (2022) Baltic Fisheries Assessment Working Group (WGBFAS). Copenhagen: ICES, 659 p, ICES Sci Rep 4(44), DOI:10.17895/ices.pub.19793014

      https://literatur.thuenen.de/digbib_extern/dn064915.pdf

    5. 4

      Gröhsler T (2022) German herring and sprat fisheries & stock assessment data in the Baltic Sea in 2021. ICES Sci Rep 4(44):637-667

      https://literatur.thuenen.de/digbib_extern/dn065015.pdf

    6. 5

      Egan A, Kvamme C, Ball J, Bartolino V, Bekkevold D, Berg F, Berges B, Brazier A, Campbell N, van Deurs M, Farrell E, Finke A, Griffiths C, Gröhsler T, Håkansson KB, Henriksen O, Huwer B, Johnsen E, Kloppmann MHF, Rohlf N, et al (2022) Herring Assessment Working Group for the Area South of 62° N (HAWG). Copenhagen: ICES, 745 p, ICES Sci Rep 4(16), DOI:10.17895/ices.pub.10072

      https://literatur.thuenen.de/digbib_extern/dn065587.pdf

    7. 6

      Cardinale M, Winker H, Moesgaard Albertsen C, Bartolino V, Bergenius Nord M, Cerviño S, van Deurs M, Dingsør GE, Duplisea D, Fall J, Garcia D, Gilljam D, Goni N, Gras M, Gröhsler T, Hommik K, Horbowy J, Howell D, Stötera S, Taylor MH, et al (2022) Workshop on ICES reference points (WKREF1). Copenhagen: ICES, 70 p, ICES Sci Rep 4(2), DOI:10.17895/ices.pub.9749

      https://literatur.thuenen.de/digbib_extern/dn064741.pdf

    8. 7

      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

    9. 8

      Gröhsler T (2021) German herring and sprat fisheries & stock assessment data in the Baltic Sea in 2020. ICES Sci Rep 3(53):659-681

      https://literatur.thuenen.de/digbib_extern/dn064091.pdf

    10. 9

      Gröhsler T (2021) German herring fisheries & stock assessment data in the Western Baltic in 2020. ICES Sci Rep 3(12):764-779

      https://literatur.thuenen.de/digbib_extern/dn064095.pdf

    11. 10

      Egan A, Kvamme C, Ball J, Bartolino V, Berg F, Berges B, Håkansson KB, Campbell N, Gröhsler T, Henriksen O, Huwer B, Johnsen E, Kloppmann MHF, Loots C, Lundy M, Mackinson S, Maersk Lusseau S, McLeod E, Mosegaard H, Nash RDM, et al (2021) Herring Assessment Working Group for the Area South of 62° N (HAWG). Copenhagen: ICES, 779 p, ICES Sci Rep 3(12), DOI:10.17895/ices.pub.8214

      https://literatur.thuenen.de/digbib_extern/dn064093.pdf

    12. 11

      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

      https://literatur.thuenen.de/digbib_extern/dn063306.pdf

    13. 12

      Schaber M, Gröhsler T (2021) Survey Report for FRV SOLEA/German Acoustic Autumn Survey (GERAS) 1 - 21 October 2020. ICES Sci Rep 3(40):189-223, DOI:10.17895ices.pub.8055_193-223

      https://literatur.thuenen.de/digbib_extern/dn064092.pdf

    14. 13

      Polte P, Gröhsler T (2021) Western Baltic spring spawning herring recruitment monitored by the Rügen Herring Larvae Survey. ICES Sci Rep 3(12):760-763

      https://literatur.thuenen.de/digbib_extern/dn064094.pdf

    15. 14

      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

    16. 15

      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

    17. 16

      Gröhsler T (2020) German herring & sprat : fisheries & stock assessment input data in the Baltic Sea in 2019. ICES Sci Rep 2(45):568-590

    18. 17

      Gröhsler T (2020) German herring fisheries & stock assessment data in the Western Baltic in 2019. ICES Sci Rep 2(60):1026-1040

    19. 18

      Bartolino V, Ball J, Berg F, Berges B, Campbell N, Damme CJG van, van Deurs M, Egan A, Gras M, Gröhsler T, Henriksen O, Håkansson 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/ices.pub.6105

    20. 19

      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/ices.pub.5971

    21. 20

      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

      https://literatur.thuenen.de/digbib_extern/dn062349.pdf

    22. 21

      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

    23. 22

      Andersen M, Bartolino V, Beauchamp B, Benoit H, Benson Ashleen, Campbell N, Coull K, Döring R, Gras M, Gröhsler T, Kempf A, Levontin P, Lordan C, MacDonald P, Mackinson S, Methot RD, Mosegaard H, Pastoors MA, Payne MR, Pinto C, et al (2020) Workshop on guidelines and methods for the evaluation of rebuilding plans (WKREBUILD). Copenhagen: ICES, 79 p, ICES Sci Rep 2(55), DOI:10.17895/ices.pub.6085

    24. 23

      Polte P, Gröhsler T (2019) 2018 Western Baltic spring spawning herring recruitment monitored by the Rügen Herring Larvae Survey. ICES Sci Rep 1(2):929-933, DOI:10.17895/ices.pub.5460

    25. 24

      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

    26. 25

      Gröhsler T (2019) German herring & sprat fisheries & stock assessment input data in the Baltic Sea in 2018. ICES Sci Rep 1(20):555-576

    27. 26

      Gröhsler T (2019) German herring fisheries & stock assessment data in the Western Baltic in 2018. ICES Sci Rep 1(2):934-946, DOI:10.17895/ices.pub.5460

    28. 27

      Bartolino V, Bekkevold D, Berg F, Berges B, Baagoe Buch T, Damme CJG van, van Deurs M, Egan A, Gras M, Gröhsler T, Henriksen O, Håkansson KB, Johnsen E, Jacobsen JA, Kloppmann MHF, Kvamme C, Loots C, Lundy M, Maersk Lusseau S, Rohlf N, et al (2019) Herring Assessment Working Group for the Area South of 62° N (HAWG). Copenhagen: ICES, 971 p, ICES Sci Rep 1(2), DOI:10.17895/ices.pub.5460

    29. 28

      Villamor B, Carbonara P, Abaunza P, Aldanondo N, Bolle LJ, Delfs G, Garcia Santamaria MT, Gröhsler T, Hernandez C, Jurado-Ruzafa A, Navarro MR, Soares E, Ramos F, Riveiro I, Rohlf N, Tornero J, Ulleweit J, Uriarte A, Worsoe Clausen L, Vitale F (2019) Small- and medium-sized pelagic species. ICES Coop Res Rep 346:59-102

    30. 29

      Casini M, Tian H, Hansson M, Grygiel W, Strods G, Statkus R, Sepp E, Gröhsler T, Orio A, Larson N (2019) Spatio-temporal dynamics and behavioural ecology of a "demersal" fish population as detected using research survey pelagic trawl catches: the Eastern Baltic Sea cod (Gadus morhua). ICES J Mar Sci 76(6):1591-1600, DOI:10.1093/icesjms/fsz016

    31. 30

      Schaber M, Gröhsler T (2019) Survey report for FRV SOLEA / German Acoustic Autumn Survey (GERAS): 01 - 19 October 2018. ICES Sci Rep 1(11):190-224

    32. 31

      Schaber M, Gröhsler T (2019) Survey report FRV Solea / German Acoustic Autumn Survey (GERAS): 01 - 19 October 2018. ICES Sci Rep 1(37):276-306, DOI:10.17895/ices.pub.5378

    33. 32

      Polte P, Gröhsler T (2018) 2017 Western Baltic spring spawning herring recruitment monitored by the Rügen Herring Larvae Survey. ICES HAWG Rep 2018:868-871

    34. 33

      Gröhsler T (2018) German herring and sprat fisheries & stock assessment data in the Baltic Sea in 2017. ICES WGBFAS Report 2018:626-646

    35. 34

      Gröhsler T (2018) German herring fisheries & stock assessment data in the Western Baltic in 2017. ICES HAWG Rep 2018:854-867

    36. 35

      Schaber M, Gröhsler T (2018) Survey Report FRV Solea / German Acoustic Autumn Survey (GERAS): 04 - 23 October 2017. ICES WGIPS Rep 2018:202-232

    37. 36

      Schaber M, Gröhsler T (2018) Survey Report FRV Solea / German Acoustic Autumn Survey (GERAS): 04 - 23 October 2017. ICES WGBIFS Rep 2018:353-379

    38. 37

      Polte P, Kotterba P, Moll D, Gröhsler T, Nordheim L von (2018) Time series of the Ruegen Larval Herring N20 Index and potential reasons for a declining larval production. In: ICES benchmark workshop on pelagic stocks (WKPELA 2018) : 12.-16.02.2018, Copenhagen. Copenhagen: ICES, pp 1-10

    39. 38

      Polte P, Oeberst R, Gröhsler T (2017) Annex 5h: Rügen herring larvae survey (RHLS). ICES WGIPS Rep 2017:284-287

    40. 39

      Gröhsler T (2017) German Herring Fisheries & Stock Assessment in the Western Baltic in 2016 : working document 02. ICES HAWG Rep 2017:841-855

    41. 40

      Gröhsler T (2017) Report of the Baltic Fisheries Assessment Working Group (WGBFAS) : 19-26 April 2017 ; ICESHQ, Copenhagen, Denmark. Copenhagen: ICES, 21 p, ICES WGBFAS Report 2017

    42. 41

      Schaber M, Gröhsler T (2017) Survey report for FRV "Solea" : German Acoustic Autumn Survey (GERAS) 30 September - 20 October 2016. WGBIFS Rep 2017:338-361

    43. 42

      Schaber M, Gröhsler T (2017) Survey report for FRV "Solea" German Acoustic Autumn Survey (GERAS) 30 September - 20 October 2016. ICES WGIPS Rep 2017:158-185

    44. 43

      Oeberst R, Gröhsler T, Schaber M (2016) Applicability of the separation function (SF) for Western Baltic Spring Spawning and Central Baltic herring stocks on 2015 GERAS survey results. ICES WGBIFS Rep 2016:319-322

    45. 44

      Winkler H, Böttcher U, Gröhsler T (2016) Baza pokarmowa ssakow morskich w poludniowej czesci Morza Baltyckiego. In: Walenie i foki w Morzu Baltyckim. Gdansk: Fundacja Rozwoju Uniwersytetu Gdanskiego, pp 28-38

    46. 45

      Gröhsler T (2016) German herring & sprat fisheries & stock assessment data in the Baltic Sea in 2015. ICES WGBFAS Report 2016:490-571

    47. 46

      Gröhsler T (2016) German herring fisheries & stock assessment data in the Western Baltic in 2015. ICES HAWG Rep 2016:819-832

    48. 47

      Gröhsler T, Schaber M, Larson N, Oeberst R (2016) Separating two herring stocks from growth data: long-term changes in survey indices for Western Baltic Spring Spawning Herring (Clupea harengus) after application of a stock separation function. J Appl Ichthyol 32(1):40-45, DOI:10.1111/jai.12924

    49. 48

      Gröhsler T, Schaber M (2016) Survey report for FRV "Solea" : German Acoustic Autumn Survey (GERAS) ; 01 - 19 October 2015. ICES WGIPS Rep 2016:165-189

    50. 49

      Gröhsler T, Schaber M (2016) Survey report for FRV "Solea" German Acoustic Autumn Survey (GERAS) 01 - 19 October 2015. ICES WGBIFS Rep 2016:144-167

    51. 50

      Schaber M, Gröhsler T (2015) Annex 6: Individual Survey cruise reports : Annex 6a: Western Baltic acoustic survey ; Survey report for FRV "Solea" ; German Acoustic Autumn Survey (GERAS) ; 30 September 2014 - 20 October 2014. ICES WGIPS Rep 2015:219-246

    52. 51

      Gröhsler T (2015) German herring & sprat fisheries & stock assessment data in the Baltic Sea in 2014. ICES WGBFAS Report 2015:607-631

    53. 52

      Gröhsler T (2015) German herring fisheries & stock assessment data in the Western Baltic in 2014. ICES HAWG Rep 2015:786-801

    54. 53

      Schaber M, Gröhsler T (2015) Survey Report for FRV "Solea" German Acoustic Autumn Survey (GERAS) : 30 September 2014 - 20 October 2014. ICES WGBIFS Rep 2015:252-280

    55. 54

      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

    56. 55

      Oeberst R, Gröhsler T, Schaber M (2014) Applicability of the Separation Function (SF) for Western Baltic Spring Spawning and Central Baltic herring stocks on 2013 GERAS survey results : Working Document Working Group of the International Pelagic Surveys (WGIPS)/WBSSH, 20 – 24 January 2014. Copenhagen: ICES, 5 p

    57. 56

      Gröhsler T (2014) German herring & sprat : fisheries and stock assessment data in the Baltic Sea in 2013. In: Report of the Baltic Fisheries Assessment Working Group (WGBFAS) : 3-10 April 2014 ; ICES HQ, Copenhagen, Denmark. Copenhagen: ICES, pp 823-845

    58. 57

      Gröhsler T (2014) German herring fisheries & stock assessment data in the Western Baltic in 2013. ICES HAWG Rep 2014:1173-1186

    59. 58

      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

    60. 59

      Polte P, Kotterba P, Hammer C, Gröhsler T (2014) Survival bottlenecks in the early ontogenesis of Atlantic herring (Clupea harengus, L.) in coastal lagoon spawning areas of the western Baltic Sea. ICES J Mar Sci 71(4):982-990, doi:10.1093/icesjms/fst050

    61. 60

      Miethe T, Gröhsler T, Böttcher U, Dorrien C von (2014) The effects of periodic marine inflow into the Baltic Sea on the migration patterns of Western Baltic spring-spawning herring. ICES J Mar Sci 71(3):519-527, doi:10.1093/icesjms/fst166

    62. 61

      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

    63. 62

      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

    64. 63

      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

    65. 64

      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

    66. 65

      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

    67. 66

      Böttcher U, Gröhsler T (2013) Der Hering ist da. Meer Küste 4:13

    68. 67

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

    69. 68

      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

    70. 69

      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

    71. 70

      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

    72. 71

      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

    73. 72

      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

    74. 73

      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

    75. 74

      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

    76. 75

      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

    77. 76

      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

    78. 77

      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

    79. 78

      Oeberst R, Gröhsler T (2013) Maturity of herring (Clupea harengus) sampled during the German Acoustic Survey (GERAS. Working Document WKPELA6. Benchmark workshop on pelagic stocks (WKPELA), 4-8 February 2013. Copenhagen: ICES, 8 p

    80. 79

      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

    81. 80

      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

    82. 81

      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

    83. 82

      Barz K, Gröhsler T, Zimmermann C (2013) Zustand und Entwicklung ausgewählter Fischbestände in der Ostsee: der ICES-Advice für 2014. Fischerei Fischmarkt MV 13(3):44-49

    84. 83

      Oeberst R, Gröhsler T (2012) Development of growth of WBSSH between 1994 and 2011 : working paper Benchmark WKPELA, 22 – 23 November 2012. 4 p

    85. 84

      Gröhsler T (2012) German herring & sprat : fisheries & stock assessment data in the Baltic Sea in 2011. ICES WGBFAS Report 2012:710-729

    86. 85

      Gröhsler T (2012) German herring & sprat : fisheries & stock assessment data in the Baltic Sea in 2012. ICES WGBFAS Report 2012:735-761

    87. 86

      Gröhsler T, Böttcher U, Schaber M (2012) Hydroakustiksurveys in der Ostsee. Fischerei Fischmarkt MV(5):44-46

    88. 87

      Oeberst R, Gröhsler T (2012) Indices of sprat and herring based on German acoustic survey in October (BIAS) - estimated with different methods for combining the results of fishing stations. ICES WGBIFS Rep 2012:413-425

    89. 88

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      Thiel R, Winkler HM, Riel P, Neumann R, Gröhsler T, Böttcher U, Spratte S, Hartmann U (2009) Endangered anadromous lampreys in the southern Baltic Sea: spatial distribution, long-term trend, population status. Endang Species Res 8(3):233-247, DOI:10.3354/esr00222

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      Gröhsler T (2009) Temporal and spatial distribution of Anchovy (Engrulis encrasicolus) in the Western Baltic Area based on the results of the joint German-Danish Acoustic Survey in 1991-2008. Copenhagen: ICES, 13 p

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