Department of
Biological Sciences

Professor, PhD
Øyvind Fiksen

Ecological mechanics and evolution

I work on plankton and fish, in particular their behaviour, life history, foraging, and predator-prey interactions. Recently, I have become interested in how the bottom topography influence how much plankton fish find and eat, and how the landscape below water contribute to the productivity of the ocean. I like research that are mechanistic, quantitative and driven by theory.

Environmental gradients in space and time create trade-offs between growth and survival, and organisms are well adapted to move along these slopes. Behavioural decisions have far-reacing consequences to for example recruitment processes and ecosystem functioning. As an example, both feeding success and death rates of a larval fish depends on its activity level and where in the water column it prefer to be. I find it intriguing to apply evolutionary models to predict where animals should be found in these gradients.

Fall J, Johannesen E, Englund G, Johansen GO, Fiksen Ø. 2021.
Predator-prey overlap in three dimensions: cod benefit from capelin coming near the seafloor
Ecography. 44: 802-815. [ doi:10.1111/ecog.05473 ] [ open access ] [ pdf ]
Aarflot JM, Dalpadado P, Fiksen Ø. In press.
Foraging in planktivorous fish increase with topographic blockage of prey
Marine Ecology-Progress Series.
Fouzai N, Opdal AF, Jørgensen C, Fiksen Ø. 2019.
Dying from the lesser of three evils: facilitation and non-consumptive effects emerge in a model with multiple predators
Oikos. 128: 1307-1317. [ doi:10.1111/oik.05631 ] [ open access ] [ pdf ]
Reglero P, Ortega A, Balbin R, Abascal FJ, Medina A, Blanco E, de la Gándara F, Alvarez-Berastegui D, Hidalgo M, Rasmuson L, Alemany F, Fiksen Ø. 2018.
Atlantic bluefin tuna spawn at suboptimal temperatures for their offspring
Proceedings of the Royal Society B. 285: 20171405. [ doi:10.1098/rspb.2017.1405 ] [ pdf ]
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