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Overview

In the Thünen topic “Fisheries”, we have three focal points:

  • Status of living marine resources. We continuously analyze development of resources in the North Sea, the Baltic Sea and the North Atlantic and methodically develop monitoring concepts. We also operate the portal “Fischbestände online”, a comprehensive source of information for the fish trade business.
  • Fisheries technology. We analyze the environmental impacts of fishing, and we develop improved fishing methods.
  • Regulation of fisheries. Together with international partners, we develop the recommendations of ICES, a central basis for EU quota regulations. We are also developing concepts for the regulation of recreational fisheries, and we are elaborating options for the rebuilding of the eel stock.

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Ein Reuse im Wasser
Bycatch and other side effects

Like almost all human activities, marine fishing has undesirable effects on the environment. One important issue is bycatch, which we aim to reduce as much as possible by optimising fishing gear.

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Stellnetzmarkierungen, so genannte Stöter, in der Ostsee
Bycatch in gillnet fisheries

Gillnets are made from very thin material so that they are nearly invisible not only for fish but also for other animals. Thus, for example harbour porpoise (Phocoena phocoena) or diving sea birds get entangled in the nets and drown.

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Unterwasserbild einer Seeanemone
Marine Protected Areas (MPAs)

The designation of MPAs should safeguard the decline of endangered species such as seabirds or the destruction of valuable marine habitats.

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Eine blau-gelbe Europaflagge mit Wellenmuster
MSFD and the „good environmental Status”

The Marine Strategy Framework Directive (MSFD): What is its goal and which role can the Thünen Institute play here?

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Bootsangler auf der Ostsee
What’s the catch? – The importance of marine recreational fisheries

Recreational fishing removals for some species can be high and variable. In addition to recreational harvest information being important for inclusion in stock assessments, marine recreational fisheries have high economic value and social benefits

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Ein Angler abends am Strand im Gegenlicht
Sampling design and catch

What do anglers catch? When, where and how? What is the impact of recreational fisheries on individual fish stocks? What is the economic and social benefit of marine recreational fisheries?

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Zwei Angler präsentieren einen großen gefangenen Dorsch
Development of the German data collection since 2003

Recreational fisheries sampling in Europe started with the introduction of the Commission Regulation (EC) No 1639/2001, requiring Member States to sample Bluefin tuna catches in all areas and Salmon in marine waters of the North and Baltic Sea.

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Portrait Alexander Kempf und Gerd Kraus
Overfishing - simple word with complicated contend

Overfishing: Dr. Gerd Kraus and Dr. Alexander Kampf, Thünen Institute of Sea Fisheries, about a frequently used term with several possibilities of interpretation

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Head of a cod
Can the Western Baltic cod still be saved?

In a study, researchers from Hamburg, Kiel and Jena conclude that the cod of the western Baltic Sea has passed a tipping point due to overfishing and deteriorating environmental conditions. This would mean that the stock would no longer recover.

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Ein Unterwasserbild einer speziellen Netzkonstruktion in der Forschung
Reduction of unwanted bycatch of fish

How can the selectivity of trawl nets be improved so that there is less bycatch? The fish themselves provide important clues to this with their behavior.

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Ein Netz mit frisch gefangenem Fisch liegt an Deck des Fischereiforschungsschiffs Walther Herwig III
ICES advice on fishing opportunities: What's behind it?

In its annual advice, ICES provides an overview of the status of exploited fish stocks in the northeast Atlantic and publishes recommendations for future sustainable fishing opportunities. We explain what the advice means for German fisheries and ...

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Ein Fang mit Wittlingen
Understanding fish stock developments – scientific basis for sustainable use

To sustainably use marine fish stocks, we have to know the present stock status and need to predict stock development in the near future. We use our long-term monitoring programmes to provide the essential scientific basis for a sustainable ...

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Ein Fischernetz im Meer.
Does the Western Baltic need different management?

Fish stocks and harbour porpoise populations in the western Baltic Sea could recover and stabilise by 2050 if ecosystem-based fisheries management is introduced. How suitable is the proposed approach?

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Verschiedene Fischarten nach dem Fang
Problems in mixed fisheries

When fishing for pelagics with midwater trawls, in most cases only one species is caught at the same time. The situation is different in bottom trawl fisheries where the catch consists of a mix of species. If the stock status differs among these ...

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Dispute
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