Director

Secretariat

Wencke Griemsmann
Institute of Sea Fisheries

Herwigstraße 31
27572 Bremerhaven
Phone: +49 471 94460 101
Fax: +49 471 94460 199
wencke.griemsmann@thuenen.de


Assessment of pelagic fish stocks in the North Sea and North Atlantic

Project

Bestandszählunf und kommerzielle Bestandsnutzung (c) Thünen-Institut/SF
(© Thünen-Institut/SF)

Data on population parameters of pelagic fish stocks (herring, mackerel, horse mackerel, blue whiting and sprat) in the North Sea and North Atlantic are combined with catch records and landings statistics and provide input for the fish stock assessments of ICES. The results of these calculations serve as a basis for sustainable fisheries management.

Background and Objective

We participate in the annual international programs to identify population parameters of the pelagic fish species herring, mackerel, horse mackerel, blue whiting and sprat in the North Sea and North Atlantic. These data are combined with catch records and landing statistics, catch and bycatch records and sampling information from the commercial fleet and provide input for the fish stock assessments of the international ICES working groups. The results of these calculations serve as a basis for political decisions in the framework of the European Common Fisheries Policy (CFP) and in international agreements. The aim of this task is to provide real-time information on the development of commercially exploited fish populations to facilitate a sustainable management of the resources.

Preliminary Results

The four most important fish species for the German fishery (in terms of landings) are pelagic species. In the North Sea and the Northeast Atlantic, the stocks of North Sea herring, Northeast Atlantic mackerel, western horse mackerel and blue whiting are of special interest for the fishery, which is mainly conducted by large pelagic freezer trawlers. For the first two stocks, management regimes have been internationally implemented over the last decade. Both stocks are in very good condition, and present catches are sustainable. The TI-SF participates in both most important surveys and a number of other international programs for the determination of fishery-independent parameters.

Links and Downloads

Thünen-Contact


Involved Thünen-Partners


Involved external Thünen-Partners


Duration

1.2001 - 12.2020

More Information

Projekt type:
Project status: ongoing

Publikationen

hits: 6

  1. Gröger JP, Hinrichsen HH, Polte P (2014) Broad-scale climate influences on spring-spawning herring (Clupea harengus, L.) recruitment in the Western Baltic Sea. PLoS One 9(2):e87525, DOI:10.1371/journal.pone.0087525
    pdf document (limited accessibility) 6504 kb
  2. Kraus G, Hinrichsen HH, Voss R, Teschner E, Tomkiewicz J, Köster F-W (2012) Robustness of egg production methods as a fishery independent alternative to assess the Eastern Baltic cod stock (Gadus morhua callarias L.). Fisheries Res 117-118:75-85
  3. Gröger JP, Missong M, Rountree RA (2011) Analyses of interventions and structural breaks in marine and fisheries time series: Detection of shifts using iterative methods. Ecol Indic 11(5):1084-1092, DOI:10.1016/j.ecolind.2010.12.008
  4. Abaunza P, Murta AG, Campbell N, Cimmaruta R, Comesana AS, Dahle G, Gallo E, Garcia Santamaria MT, Gordo LS, Iversen SA, MacKenzie K, Magoulas A, Mattiocci S, Molloy J, Nascetti G, Pinto AL, Quinta R, Ramos P, Stransky C, Zimmermann C, et al (2008) Considerations on sampling strategies for an holistic approach to stock identification : the example of the HOMSIR project. Fisheries Res 89(2):104-113, DOI:10.1016/j.fishres.2007.09.020
  5. Stransky C, Murta AG, Schlickeisen J, Zimmermann C (2008) Otolith shape analysis as a tool for stock separation of horse mackerel (Trachurus trachurus) in the Northeast Atlantic and Mediterranean. Fisheries Res 89(2):159-166, DOI:10.1016/j.fishres.2007.09.017
  6. Abaunza P, Murta AG, Campbell N, Cimmaruta R, Comesana AS, Dahle G, Garcia Santamaria MT, Gordo LS, Iversen SA, MacKenzie K, Magoulas A, Mattiocci S, Molloy J, Nascetti G, Pinto AL, Quinta R, Ramos P, Sanjuan A, Stransky C, Zimmermann C, et al (2008) Stock identity of horse mackerel (Trachurus trachurus) in the Northeast Atlantic and Mediterranean Sea : integrating the results from different stock identification approaches. Fisheries Res 89(2):196-209, DOI:10.1016/j.fishres.2007.09.022