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Marine Ecology Progress Series

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MEPS 691:115-129 (2022)  -  DOI:

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

Regitze B. C. Lundgreen1,*, Anders Nielsen1, Maria Krüger-Johnsen1, David Righton2, Monica Mion3, Krzysztof Radtke4, Maris Plikshs5, Ari J. Leskelä6, Jari Raitaniemi6, Christopher A. Griffiths3,7, Michele Casini3,8, Uwe Krumme9, Karin Hüssy1

1National Institute of Aquatic Resources, Technical University of Denmark, Kongens Lyngby 2800, Denmark
2Centre for Environment, Fisheries and Aquaculture Science (Cefas), Lowestoft NR33 0HT, UK
3Department of Aquatic Resources, Institute of Marine Research, Swedish University of Agricultural Sciences, 45330 Lysekil, Sweden
4National Marine Fisheries Research Institute, 81-332 Gdynia, Poland
5Fish Resource Research Department, Institute of Food Safety, Animal Health and Environment, LV-1076 Riga, Latvia
6Natural Resources Institute Finland, Yliopistokatu 6, FI-80100 Joensuu, Finland
7Ecology and Evolutionary Biology, School of Biosciences, University of Sheffield, Sheffield S10 2TN, UK
8Department of Biological, Geological and Environmental Sciences, University of Bologna, 40126 Bologna, Italy
9Thünen Institute of Baltic Sea Fisheries, 18069 Rostock, Germany
*Corresponding author:

ABSTRACT: 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.

KEY WORDS: Atlantic cod · Movement · Advection-diffusion · Mark-recapture · Baltic Sea · North Sea

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Cite this article as: Lundgreen RBC, Nielsen A, Krüger-Johnsen M, Righton D and others (2022) Examining fish movement in terms of advection and diffusion: a case study of northeastern Atlantic cod. Mar Ecol Prog Ser 691:115-129.

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