Tagging and migration patterns of bluefin tuna in Nordic waters (tagging and migration of bluefin tuna in nordic waters (NORDTUN & NORDTUN 2) (39377 & 39539)

Project Details


Bluefin tuna, one of the world’s largest, and most valuable and charismatic fish species, has returned in large numbers to Nordic waters in the past few years after being extremely rare for 50-60 years. However, the reasons for both the return and the original decline and disappearance, remain unclear and subject to much scientific and public speculation. The reasons likely involve a complex interaction between exploitation of tuna and their prey and ecosystem conditions in the ocean.

Identifying the factors affecting bluefin tuna migratory behaviour, habitat use and large-scale distribution is important for understanding the ecology of the species, its impact on foodwebs including prey and competitors and its exposure to commercial and recreational fisheries throughout its range in the Northeast Atlantic and Mediterranean Sea. Moreover, bluefin tuna in the Atlantic Ocean are considered to belong to two different stocks (east and west of 45o W) and individuals often migrate across this border and occupy common foraging areas.

The project aims at sharing operational tagging experiences and knowledge among the participating Nordic partners; this will increase the success and ecological scope of all partners’ tagging activities. Consequently, the Nordic network created by this project will be used for discussing and interpreting the tagging data as they become available.

DTU Aqua, National Institute of Aquatic Resources (coordinator)
Institute of Marine Research, Department of Aquatic Resources, Swedish University of Agricultural Sciences, Sweden
Institute of Marine Research, Norway
Greenland Institute of Natural Resources, Greenland

The project is funded by AG Fish, Nordic Council of Ministers. 

Research area: Marine Populations and Ecosystem Dynamics
Research area: Freshwater Fisheries and Ecology
Effective start/end date01/01/201631/05/2020


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