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Dr. Tomas Gröhsler


Institute of Baltic Sea Fisheries


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

Publications

  1. 0

    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

  2. 1

    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

  3. 2

    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

  4. 3

    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

  5. 4

    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

  6. 5

    Cardinale M, Winker H, Moesgaard Albertsen C, Bartolino V, Bergenius Nord M, Cerviño S, van Deurs M, Dingsoer 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

  7. 6

    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

  8. 7

    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

  9. 8

    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

  10. 9

    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

  11. 10

    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

  12. 11

    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

  13. 12

    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

  14. 13

    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

  15. 14

    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

  16. 15

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

  17. 16

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

  18. 17

    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

  19. 18

    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

  20. 19

    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

  21. 20

    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

  22. 21

    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

  23. 22

    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

  24. 23

    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

  25. 24

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

  26. 25

    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

  27. 26

    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

  28. 27

    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

  29. 28

    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

  30. 29

    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

  31. 30

    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

  32. 31

    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

  33. 32

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

  34. 33

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

  35. 34

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

  36. 35

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

  37. 36

    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

  38. 37

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

  39. 38

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

  40. 39

    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

  41. 40

    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

  42. 41

    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

  43. 42

    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

  44. 43

    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

  45. 44

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

  46. 45

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

  47. 46

    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

  48. 47

    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

  49. 48

    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

  50. 49

    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

  51. 50

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

  52. 51

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

  53. 52

    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

  54. 53

    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

  55. 54

    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

  56. 55

    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

  57. 56

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

  58. 57

    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

  59. 58

    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

  60. 59

    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

  61. 60

    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

  62. 61

    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

  63. 62

    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

  64. 63

    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

  65. 64

    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

  66. 65

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

  67. 66

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

  68. 67

    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

  69. 68

    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

  70. 69

    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

  71. 70

    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

  72. 71

    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

  73. 72

    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

  74. 73

    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

  75. 74

    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

  76. 75

    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

  77. 76

    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

  78. 77

    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

  79. 78

    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

  80. 79

    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

  81. 80

    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

  82. 81

    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

  83. 82

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

  84. 83

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

  85. 84

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

  86. 85

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

  87. 86

    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

  88. 87

    Gröhsler T, Oeberst R, Schaber M, Casini M, Chervonstev V, Wyszynski M (2012) Mixing of Western Baltic Spring Spawning and Central Baltic Herring (Clupea harengus L.) Stocks - implication and consequences for stock assessment. ICES WGBFAS Report 2012:730-753

  89. 88

    Casey J, Abella JA, Andersen J, Bailey N, Bertignac M, Cardinale M, Curtis H, Daskalov G, Delaney A, Döring R, Garcia Rodriguez M, Gascuel D, Graham N, Gustavsson T, Jennings S, Kenny A, Kempf A, Zimmermann C, Bastardie F, Gröhsler T, et al (2012) Multispecies management plans for the Baltic (STECF-12-06). Luxembourg: Publications Office of the European Union, 69 p, EUR Sci Techn Res Ser

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    Walther Y, Casini M, Gröhsler T, Krumme U, Strehlow HV, Wyszynski M, Kornilovs G, Pönni J, Raid T, Storr-Paulsen M (2012) Species measurement error for pelagic species in the Baltic Sea - an overview : working document 5 ; Baltic Fisheries Assessment Working Group (WGBFAS) 12-19 April 2012. ICES WGBFAS Report 2012:754-765

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    Winkler H, Böttcher U, Gröhsler T (2011) Zur Nahrungsbasis mariner Säugetiere in der südlichen Ostsee. Meer Museum 23:41-52

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    Cardinale M, Möllmann C, Bartolino V, Casini M, Kornilovs G, Raid T, Margonski P, Grzyb A, Raitaniemi J, Gröhsler T, Flinkman J (2009) Effect of environmental variability and spawner characteristics on the recruitment of Baltic herring Clupea harengus populations. Mar Ecol Progr Ser 388:221-234, DOI:10.3354/meps08125

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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, Stepputtis D, Krieger A, Jantschik P, Weigelt R, Storr-Paulsen M, Vitale F, Karnicki Z (2009) Studies and pilot projects for carrying out the common fisheries policy : Lot 8 ; Joint data collection between the fishing sector and the scientific community in the Baltic Sea ; Report of Project FISH/2006/15-Lot 8 for the European Commission DG fish. 208 p

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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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    Oeberst R, Klenz B, Gröhsler T, Dickey-Collas M, Nash RDM, Zimmermann C (2009) When is year-class strength determined in western Baltic herring? ICES J Mar Sci 66(8):1667-1672, DOI:10.1093/icesjms/fsp143

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    Hammer C, Dorrien C von, Ernst P, Gröhsler T, Köster F, MacKenzie BR, Möllmann C, Wegner G, Zimmermann C (2008) Fish stock development under hydrographic and hydrochemical aspects, the history of Baltic Sea fisheries and its management. In: Feistel R, Nausch G, Wasmund N (eds) State and evolution of the Baltic Sea, 1952 - 2005 : a detailed 50-year survey of meteorology and climate, physics, chemistry, and marine environment. Hoboken, NJ: Wiley-Interscience, pp 543-581

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    Thiel R, Riel P, Neumann R, Winkler HM, Böttcher U, Gröhsler T (2008) Return of twaite shad Alosa fallax (Lacépède, 1803) to the Southern Baltic Sea and the transitional area between the Baltic and North Seas. Hydrobiologia 602(1):161-177, DOI:10.1007/s10750-008-9293-4

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    Rätz H-J, Bethke E, Hölker F, Gröhsler T (2008) Simulierte Auswirkungen des mehrjährigen Bewirtschaftungsplans für die Dorschfischerei in der westlichen Ostsee und die Möglichkeiten einer technischen Alternative. Inf Fischereiforsch 55:36-44, DOI:10.3220/Infn55_36-44_2008

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    Gröhsler T, Böttcher U (2007) Dorsch - das Problemkind der Ostsee. In: Löser N (ed) Meer und Küste - Deutsche Ostsee. Warnemünde: EUCC - Die Küsten Union Deutschland eV am Leibnitz-Institut für Meeresforschung Warnemünde, pp 24-25

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    Baumann H, Gröhsler T, Kornilovs G, Makarchouk A, Feldmann V, Temming A (2006) Temperature-induced regional and temporal growth differences in Baltic young-of-the-year sprat Sprattus sprattus. Mar Ecol Progr Ser 317:225-236

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    Gröhsler T, Götze E (2004) Survey report for RV "Solea" 30.09.-18.10.2003. In: International Council for the Exploration of the Sea (ed) Report of the Planning Group for Herring Surveys : 27-30 January 2004 ; Flodivigen, Norway. Copenhagen: ICES, pp 137-149

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    Gröhsler T, Müller H (2004) Updated information on maturity ogives for Western Baltic herring. Copenhagen: ICES, 12 p

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    Gröhsler T, Götze E (2003) Proposed modifications to the Manual for the Baltic International Acoustic Survey (BIAS) : Version 0.72 ; 07.04.2000. In: Report of the Baltic International Fish Survey Working Group : Copenhagen, Denmark 24-28 March 2003. Copenhagen: ICES, pp 64-67

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    Gröhsler T, Böttcher U, Gröger JP, Hinrichs R, Kuhn A, Stephan D (2001) A new sampling regime for resource assessment of herring in the Skagerrak, Kattegat and SW Baltic. 3 p

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    Gröhsler T (2001) AFCM-Tagung im Mai 2001 : die Lage der Fischbestände im Nordatlantik, Nord- und Ostsee. Hamburg: Bundesforschungsanstalt für Fischerei, 23 p

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    Gröhsler T, Böttcher U, Götze E (2000) Horizontal and vertical distribution of sprat in the Southern Baltic Sea during spawning time : first results of the 1999 German June Acoustic Survey. Copenhagen: ICES, 10 p

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    Gröhsler T (1998) Separation of spring and autum spawning herring in the Skagerrak and Kattegat : Interim Report : Reporting Period 1. March 1997 - 31. August 1998. Rostock: Thünen-Institut für Ostseefischerei, 36 p

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