Research project The evolutionary link between brain morphology variation and behaviour

My group runs multiple projects in multiple constellations to study how evolution of brain and behaviour are interlinked. These projects span between lab experiments on intraspecific variation to large-scale phylogenetic comparative analyses on thousands of vertebrate species.


Currently, my experimental focus lies in investigating brain and behavioural evolution in three different guppy selection lines with differences in brain size (and neuron number), schooling propensity, and telencephalon size. We use these to answer questions about how brain morphology and behaviour can evolve, and the costs and benefits of such evolutionary changes. We also use these selection lines to study how pharmaceutical pollution in the aquatic environment affect different types of brains and behavioural phenotypes. For these analyses we have a battery of infrastructure to test multiple aspects of cognitive abilities, collective motion, mate choice, life-history variation and physiological parameters such as metabolic rate, swimming performance and morphological variation using advanced imaging techniques such as X-ray microscopy. In addition, I participate in a project on dogs where we study several aspects of brain, behavioural and morphological evolution across contemporary dog breeds. Again, this project use data from behavioural assays and advanced imaging techniques such as CT-scans.[n1]

2021 - Fong S, Rogell B, Amcoff M, Kotrschal A, van der Bijl W, Buechel SD, Kolm N. Rapid mosaic brain evolution under artificial selection for relative telencephalon size in the guppy (Poecilia reticulata). Science Advances 7 (46).

2020 - Kotrschal A, Szorkovszky A, Herbert Read J, Bloch NI, Romenskyy M, Buechel SD, Fontrodona A, Sanchez L, Zeng H, LeFoll A, Braux G, Pelckmans K, Mank JE, Sumpter DJT, Kolm N. Rapid evolution of coordinated and collective movement in response to artificial selection. Science Advances 6 (49).

2019 - Tsuboi M, van der Bijl W, Kopperud BT, Erritzøe J, Voje KL, Kotrschal A, Yopak KE, Collin SC, Iwaniuk A, Kolm N. Reply to: Comparisons of static brain–body allometries across vertebrates must distinguish between indeterminate and determinate growth. Nature Ecology & Evolution. 10: 1405-1406.

2019 - Wright AE, Darolti I, Bloch NI, Oostra V, Sandkam BA, Buechel SD, Kolm N, Breden F, Vicoso B, Mank JE. On the power to detect rare recombination events. PNAS. 116: 12607-12608.

2018 - Bloch NI, Corral-López A, Buechel SE, Kotrschal A, Kolm N, Mank JE. Early neurogenomic response associated with variation in guppy female mate preference. Nature Ecology & Evolution. 11: 1772-1781.

2018 - Tsuboi M, van der Bijl W, Kopperud BT, Erritzøe J, Voje KL, Kotrschal A, Yopak KE, Collin SP, Iwaniuk AN, Kolm N. Breakdown of brain-body allometry and the encephalization of birds and mammals. Nature Ecology & Evolution. 2: 1492-1500.

2018 - Wright AE, Fumagalli M, Cooney CR, Bloch NI, Vieira FG, Buechel SD, Kolm N, Mank JE.. Male‐biased gene expression resolves sexual conflict through the evolution of sex‐specific genetic architecture. Evolution letters. 2: 52-61.

2017 - Corral-López A, Bloch NI, Kotrschal A, van der Bijl W, Buechel SD, Mank JE, Kolm N. Female brain size affects the assessment of male attractiveness during mate choice. Science Advances. 3: e1601990.

2017 - Wright AE, Darolti I, Bloch NI, Oostra V, Sandkam B, Buechel SD, Kolm N, Breden F, Vicoso B, Mank JE. Convergent recombination suppression suggests role of sexual selection in guppy sex chromosome formation. Nature communications. 8: 1-10.

2015 - Kotrschal A, Büchel S, Zala S, Corral-Lopez A, Penn D, Kolm N. Brain size affects female but not male survival under predation threat. Ecology Letters, 18: 646-652.

2013 - Kotrschal A, Rogell B, Bundsen A, Svensson B, Zajitschek S, Brännström I, Immler S, Maklakov AA, Kolm N. Artificial selection on relative brain size in the guppy reveals costs and benefits of evolving a larger brain. Current Biology, 23,1-4.

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