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Research article - Peer-reviewed, 2022

Examining fish movement in terms of advection and diffusion: a case study of northeastern Atlantic cod

Lundgreen, Regitze B. C.; Nielsen, Anders; Kruger-Johnsen, Maria; Righton, David; Mion, Monica; Radtke, Krzysztof; Plikshs, Maris; Leskela, Ari J.; Raitaniemi, Jari; Griffiths, Christopher A.; Casini, Michele; Krumme, Uwe; Hussy, Karin


Advection (directional movement) and diffusion (dispersed movement) were applied for the first time to describe movement patterns in Atlantic cod in the North Sea and Baltic Sea between 1955 and 2020. The advection-diffusion approach provided more detailed estimates of movement that corresponded to previously observed patterns using different analytical techniques. Spatial patterns were evident with greater movement distances in cod from the North Sea and eastern Baltic Sea compared to the western Baltic and Kattegat-Skagerrak. Furthermore, comparative case studies on different ecotypes in the western and eastern Baltic suggested that inshore cod were more resident compared to offshore cod. This preliminary study highlights the usefulness of the advection-diffusion method to describe movements in fish populations, and can be further expanded by incorporating information on environment and mortality and providing information to spatially explicit population models.


Atlantic cod; Movement; Advection-diffusion; Mark-recapture; Baltic Sea; North Sea

Published in

Marine Ecology Progress Series
2022, volume: 691, pages: 115-129

Authors' information

Lundgreen, Regitze B. C.
Technical University of Denmark
Nielsen, Anders
Technical University of Denmark
Kruger-Johnsen, Maria
Technical University of Denmark
Righton, David
Centre for Environment Fisheries and Aquaculture Science
Swedish University of Agricultural Sciences, Department of Aquatic Resources
Radtke, Krzysztof
National Marine Fisheries Research Institute
Plikshs, Maris
Institute of Food Safety, Animal Health and Environment BIOR
Leskela, Ari J.
Natural Resources Institute Finland (Luke)
Raitaniemi, Jari
Natural Resources Institute Finland (Luke)
Swedish University of Agricultural Sciences, Department of Aquatic Resources
Griffiths, Christopher A.
University of Sheffield
Swedish University of Agricultural Sciences, Department of Aquatic Resources
University of Bologna
Krumme, Uwe
Johann Heinrich von Thunen Institute
Hussy, Karin
Technical University of Denmark

UKÄ Subject classification

Fish and Aquacultural Science

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