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Philip Jacobson

Philip Jacobson


My research focus on the importance of predator-prey interactions for individual performance and population dynamics of predatory fish and their ecological function in aquatic systems. I also work with European eel management within the unit of diadromous fish at SLU Aqua since 2022.



2020: PhD in Marine Ecology, Swedish University of Agricultural Sciences (SLU): "Size-dependent predator-prey interactions, distribution and mortality in salmon: effects on individuals and populations"

2015: MSc degree in Marine Ecology, Stockholm University, Sweden.

2013: BSc degree in Biology, Stockholm University, Sweden.


2018-2019: Co-supervisor for Ulrika Tollerz Brattby, 30 credit MSc thesis project: Factors explaining variation in the fecundity of female Baltic salmon (Salmo salar) – the influence of length, body condition and growth rate at sea.

Selected publications

Jones, D., Dahlgren, E., Jacobson, P., & Karlson, A. M. 2022. Determining Baltic salmon foraging areas at sea using stable isotopes in scales—a tool for understanding health syndromes. ICES Journal of Marine Science, 79(1), 158-168. DOI:

Jacobson, P., Whitlock, R., Huss, M., Leonardsson, K., Östergren, J., & Gårdmark, A. 2021. Growth variation of Atlantic salmon Salmo salar at sea affects their population-specific reproductive potential. Marine Ecology Progress Series, 671, 165-174. DOI:

Jacobson, P., Gårdmark, A., Huss, M. 2020. Population and size‐specific distribution of Atlantic salmon Salmo salar in the Baltic Sea over five decades. Journal of Fish Biology, 96: 408-417. DOI:

Jacobson, P., Bergström, U., Eklöf, J. S. 2019. Size-dependent diet composition and feeding of Eurasian perch (Perca fluviatilis) and northern pike (Esox lucius) in the Baltic Sea. Boreal Environmental Research, 24: 137-153. URL:

Jacobson, P., Gårdmark, A., Östergren, J., Casini, M., & Huss, M. (2018). Size‐dependent prey availability affects diet and performance of predatory fish at sea: A case study of Atlantic salmon. Ecosphere, 9(1), e02081. DOI:

Donadi, S., Austin, Å. N., Bergström, U., Eriksson, B. K., Hansen, J. P., Jacobson, P., Sundblad, G., van Regteren, M., Eklöf, J. S. 2017. A cross-scale trophic cascade from large predatory fish to algae in coastal ecosystems. Proceedings of the Royal Society B: Biological Sciences, 284(1859), 20170045. DOI:


Google Scholar:



Researcher at the Department of Aquatic Resources; Unit Diadromous Species
Telephone: +460104784278, +46722438879
Postal address:
Sötvattenslaboratoriet, Stångholmsvägen 2
Visiting address: Stångholmsvägen 2, Drottningholm