Institute of

Sea Fisheries




Herwigstraße 31

27572 Bremerhaven

Telephone: +49 471 94460 101

Fax: +49 471 94460 199

Dr. Norbert Rohlf

Dr. Norbert  Rohlf
Herwigstraße 31
27572 Bremerhaven
+49 471 94460 331
+49 471 94460 199

Research interests

  • Population dynamics of pelagic fish stocks
  • Early life stages of fishes
  • Ichthyoplankton and acoustic surveys
  • Stock-coordination for herring in the North Sea
  • Surveydesign


  • Population dynamics and assessment of pelagic fish stocks (herring, mackerel, horse mackerel, blue whiting and sprat) in the North Sea and North Atlantic
  • Biological monitoring of German fisheries activities and derivation of protection measures for fish stocks
  • Conduction of international herring larvae surveys in the North Sea
  • Recruitment research: Investigation of fish eggs and larvae in terms of species composition and size

Educational background and employment

  • since 2006: Scientist at the Institute of Sea Fisheries
  • 2000 – 2006: Freelance work as consultant. Main focus on fish eggs, larvae surveys and video-aided image analyses for plankton identification
  • 2000: Dissertation. Doctor’s thesis title: „Verhaltensänderungen der Larven des Ostseedorsches (Gadus morhua callarias) während der Dottersackphase“ (in German)
  • 1994 – 2000: Scientist at the Institute of Marine Research in Kiel. Collaborate in projects on the impact of fisheries on fish stock recruitment in the Baltic. Performance of herring larvae surveys in the North Sea from 1998 onwards
  • 1994: Master of Science at the Christian-Albrechts-University in Kiel. Thesis title: „Wachstumsuntersuchungen an den Otolithen mariner Fischlarven“ (in German).