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In the Ethology division we study animal behavior mainly based on Tinbergen’s four questions. This means we are interested in i) the function and fitness effects of variation in behavior, ii) the developmental background to variation in behavior, iii) the mechanisms behind variation in behavior and iv) the phylogenetic patterns of variation in behavior. For this, we use an array of techniques spanning across field observations, lab experiments and phylogenetic comparative analyses to study behavior in different taxa.

Foraging decisions

Animal personality

Fish brain. Foto: Alex Kotraschal.

Brain evolution

Lövsångare. Foto: Johanna Hedlund.

Climate Change and Behaviour

Collective Behaviour


Adaptive colouration



Sexual Selection

Social Behaviour

Våra senaste publikationer

Alexander Kotrschal, Alexander Szorkovszky, Maksym Romenskyy, Andrea Perna, Severine D. Buechel, Hong-Li Zeng, Kristiaan Pelckmans, David Sumpter, Niclas Kolm. 2018. Brain size does not impact shoaling dynamics in unfamiliar groups of guppies (Poecilia reticulata). Behavioural Processes 147: 13-20.

Ariel F. Kahrl, Brittney M. Ivanov, Katharina C. Wollenberg Valero, Michele A. Johnson. 2018. Ecomorphological Variation in Three Species of Cybotoid Anoles. Herpetologica 74: 29-37.

Séverine D. Buechel, Annika Boussard, Alexander Kotrschal, Wouter van der Bijl, Niclas Kolm. 2018. Brain size affects performance in a reversal-learning test. Proceedings of the Royal Society of London, Series B, Biological Sciences 285.

Alessandro Devigili, John L. Fitzpatrick, C. Gasparini, I. W. Ramnarine, A. Pilastro, J. P. Evans. 2018. Possible glimpses into early speciation - the effect of ovarian fluid on sperm velocity accords with post-copulatory isolation between two guppy populations. Journal of Evolutionary Biology 31: 66-74.

Wouter van der Bijl. 2018. Why and how brain size evolves - Sociality, predation and allometry. Doctoral thesis. Department of Zoology, Stockholm University.

Rebecca S. Stutz, Ulrika A. Bergvall, Olof Leimar, Juha Tuomi, Pasi Rautio. 2018. Cohesiveness reduces foraging efficiency in a social herbivore. Animal Behaviour 135: 57-68.