Alexander Kotrschal

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Alexander Kotrschal

Forskare

Kontakt

Avdelning:
Zoologiska institutionen: Etologi
Telefon:
08-16 40 46
E-post:
alexander.kotrschal@zoologi.su.se
ORCID iD:
orcid.org/0000-0003-3473-1402
Fax:
08-15 95 22
Besöksadress:
Svante Arrheniusväg 18 B
Rum:
D 543
Postadress:
Stockholms universitet
Zoologiska institutionen: Etologi
106 91 Stockholm

Forskningsintressen

I am a Biologist with a strong interest in both Animal Behaviour and Evolution. My topics range from phenotypic plasticity of behaviour and physiology to the evolution of brain size and cognitive ability. I predominantly work with fish - be it cichlids from Lake Tanganyika, Salmon from Canada and Sweden, or Guppies from Trinidad - but have also worked with wild house mice and nightingales.
As a previous Erwin Schrödinger fellow (Austrian Science Fund) I was involved in a large-scale experiment in which we experimentally investigate brain size evolution of vertebrates. After determining the costs and benefits of a large brain using artificial brain size selection in Guppies at Uppsala University, Sweden, I moved to the Konrad Lorenz Institute of the Veterinary School in Vienna to investigate how animals with large and small brains perform in a naturalistic setting and whether they differ in immunity. At Stockholm University (since autumn 2014) we continue to pursue a number of questions with those large- and small-brained fish. Currently I am a forskare in a Wallenberg project investigating the basis of sociality, which includes another artificial selection approach with guppies.
I am an Associate Editor for Evolutionary Ecology and got the Niko Tinbergen Award this year


You can find copies of my papers on my Research Gate site:
Kotrschal ResearchGate

I am also on google.scholar:
Kotrschal GoogleScholar


Here are my peer reviewed publications:
(with links to media coverage)

2016.


28. Buechel, S.D., Booksmythe, I., Kotrschal A., Jennions, M.D., Kolm, D. Artificial selection on male genitalia length alters female brain size.
Proceedings of the Royal Society - Biological Sciences, online early
phys.org
daily mail ;-)
TheConversation

27. Liao, W.B., Lou, S.L., Zeng, Y. & Kotrschal, A. 2016. Large brains, small guts: The expensive tissue hypothesis supported in anurans.
American Naturalist. 188(6):000-000

26. Zeng, Y., Lou, S.L., Liao, W.B., Jehle, R., Kotrschal A. 2016 Sexual selection impacts brain anatomy in frogs and toads.
Ecology and Evolution, 6(19):7070-7079 online


25. Tsuboi, M., Kotrschal, A., Hayward, A., Buechel, S. D., Zidar, J., Løvlie, H. & Kolm, N. 2016. Evolution of brain-body allometry in Lake Tanganyika cichlids.
Evolution, online early

24. Kotrschal A, Kolm N, Penn DJ 2016 Selection for brain size impairs innate, but not adaptive immune responses.
Proceedings of the Royal Society - Biological Sciences, 283(1826): 20152857. pdf
AAAS

2015.


23. Kotrschal A, Corral-Lopez A, Szidat S, Kolm N. 2015 The effect of brain size evolution on feeding propensity, digestive efficiency and juvenile growth
Evolution. 69(11): 3013-3020.

22. van der Bijl W, Thyselius M, Kotrschal A, Kolm N. 2015 Brain size affects the behavioural response to predators in female guppies (Poecilia reticulata).
Proceedings of the Royal Society - Biological Sciences, (1812), 20151132 pdf

21. Chen Y*, Harrison P*, Kotrschal A*, Kolm N**, Mank JE** & Panula P**. 2015 Expression change in Angiopoietin-1 underlies change in relative brain size in fish. 282 (1810), 20150872
Proceedings of the Royal Society - Biological Sciences, pdf
* shared first
** shared last
Phys.org

20. Kotrschal A, Büchel S, Zala S, Corral-Lopez A, Penn D & Kolm N. 2015 Brain size affects female but not male survival under predation threat.
Ecology Letters, 18 (7), 646-652.
New Scientist

19. Fischer, S., Bessert, M., Kotrschal, A., Taborsky, B. 2015. Rearing group size determines social competence and brain structure in a cooperatively breeding cichlid.
American Naturalist, 186 (1), 123-140.

18. Kotrschal, A., Corral‐Lopez, A., Zajitschek, S., Immler, S., Maklakov, A. A. & Kolm, N. 2015. Positive genetic correlation between brain size and sexual traits in male guppies artificially selected for brain size.
Journal of Evolutionary Biology, 28 (4), 841-850.

17. Tsuboi, M., Husby, A., Kotrschal, A., Hayward, A., Buechel, S. D., Zidar, J., Løvlie, H. & Kolm, N. 2015. Comparative support for the expensive tissue hypothesis: Big brains are correlated with smaller gut and greater parental investment in Lake Tanganyika cichlids.
Evolution, 69, 190-200.

16. Corral Lopez A, Eckerström Liedholm S, van der Bijl W, Kotrschal A & Kolm N. 2015. No association between brain size and male sexual behavior in the guppy.
Current Zoology, 61 (2), 265-273.

2014.


15. Kotrschal, A., Lievens, E. J., Dahlbom, J., Bundsen, A., Semenova, S., Sundvik, M., Maklakov, A. A., Winberg, S., Panula, P. & Kolm, N. 2014. Artificial selection on relative brain size reveals a positive genetic correlation between brain size and proactive personality in the guppy.
Evolution, 68, 1139-1149.

14. Kotrschal, A., Trombley, S., Rogell, B., Brannström, I., Foconi, E., Schmitz, M. & Kolm, N. 2014. The mating brain: early maturing sneaker males maintain investment into the brain also under fast body growth in Atlantic salmon (Salmo salar).
Evolutionary Ecology, 28, 1043-1055.

13. Kotrschal, A., Szidat, S. & Taborsky, B. 2014. Developmental plasticity of growth and digestive efficiency in dependence of early‐life food availability.
Functional Ecology, 28, 878-885.

12. Kotrschal, A., Corral-Lopez, A., Amcoff, M. & Kolm, N. 2014. A larger brain confers a benefit in a spatial mate search learning task in male guppies.
Behavioral Ecology, aru227.

2013.


11. Kotrschal, A., Rogell, B., Bundsen, A., Svensson, B., Zajitschek, S., Brännström, I., Immler, S., Maklakov, A. A. & Kolm, N. 2013. The benefit of evolving a larger brain: big-brained guppies perform better in a cognitive task.
Animal Behaviour, 86, e4-e6.

10. Kotrschal, A., Rogell, B., Bundsen, A., Svensson, B., Zajitschek, S., Brännström, I., Immler, S., Maklakov, A. A. & Kolm, N. 2013. Artificial selection on relative brain size in the guppy reveals costs and benefits of evolving a larger brain.
Current Biology, 23, 168-171.
Nature
Time Magazine

2012.


9. Kotrschal, A., Sundström, L. F., Brelin, D., Devlin, R. & Kolm, N. 2012. Inside the heads of David and Goliath: environmental effects on brain morphology among wild and growth‐enhanced coho salmon Oncorhynchus kisutch.
Journal of Fish Biology, 81, 987-1002.

8. Kotrschal, A., Rogell, B., Maklakov, A. A. & Kolm, N. 2012. Sex-specific plasticity in brain morphology depends on social environment of the guppy, Poecilia reticulata.
Behavioral Ecology and Sociobiology, 66, 1485-1492.

7. Kotrschal, A., Räsänen, K., Kristjánsson, B. K., Senn, M. & Kolm, N. 2012. Extreme sexual brain size dimorphism in sticklebacks: a consequence of the cognitive challenges of sex and parenting?
Plos One, 7, e30055.
New Scientist

6. Kotrschal, A., Heckel, G., Bonfils, D. & Taborsky, B. 2012. Life-stage specific environments in a cichlid fish: implications for inducible maternal effects.
Evolutionary Ecology, 26, 123-137.

2011 and before.


5. Kotrschal, A., Fischer, B. & Taborsky, B. 2011. A noninvasive method to determine fat content in small fish based on swim bladder size estimation.
Journal of Experimental Zoology Part A: Ecological Genetics and Physiology, 315, 408-415.

4. Kotrschal, A. & Taborsky, B. 2010. Resource Defence or Exploded Lek?–A Question of Perspective.
Ethology, 116, 1189-1198.

3. Kotrschal, A. & Taborsky, B. 2010. Environmental change enhances cognitive abilities in fish.
Plos Biology, 8, e1000351.

2. Ilmonen, P., Kotrschal, A. & Penn, D. J. 2008. Telomere attrition due to infection.
Plos One, 3, e2143.

1. Kotrschal, A., Ilmonen, P. & Penn, D. J. 2007. Stress impacts telomere dynamics.
Biology Letters, 3, 128-130.

Publikationer

Refereegranskat

Alexander Kotrschal, Niclas Kolm, Dustin J. Penn. 2016. Selection for brain size impairs innate, but not adaptive immune responses. Proceedings of the Royal Society of London, Series B, Biological Sciences 283.

Masahito Tsuboi, Alexander Kotrschal, Alexander Hayward, Severine Denise Buechel, Josefina Zidar, Hanne Lovlie, Niclas Kolm. 2016. Evolution of brain-body allometry in Lake Tanganyika cichlids. Evolution 70: 1559-1568.

Yu Zeng, Shang Ling Lou, Wen Bo Liao, Robert Jehle, Alexander Kotrschal. 2016. Sexual selection impacts brain anatomy in frogs and toads. Ecology and Evolution 6: 7070-7079.

Wen Bo Liao, Shang Ling Lou, Yu Zeng, Alexander Kotrschal. 2016. Large Brains, Small Guts - The Expensive Tissue Hypothesis Supported within Anurans. American Naturalist 188: 693-700.

Séverine D. Buechel, Isobel Booksmythe, Alexander Kotrschal, Michael D. Jennions, Niclas Kolm. 2016. Artificial selection on male genitalia length alters female brain size. Proceedings of the Royal Society of London, Series B, Biological Sciences 283.

Alexander Kotrschal, Alberto Corral-Lopez, S. Zajitschek, S. Immler, A. A. Maklakov, Niclas Kolm. 2015. Positive genetic correlation between brain size and sexual traits in male guppies artificially selected for brain size. Journal of Evolutionary Biology 28: 841-850.

Alberto Corral-Lopez, Simon Eckerström-Liedholm, Wouter Van der Bijl, Alexander Kotrschal, Niclas Kolm. 2015. No association between brain size and male sexual behavior in the guppy. Current Zoology 61: 265-273.

Alexander Kotrschal, Alberto Corral-Lopez, Mirjam Amcoff, Niclas Kolm. 2015. A larger brain confers a benefit in a spatial mate search learning task in male guppies. Behavioral Ecology 26: 527-532.

Masahito Tsuboi, Arild Husby, Alexander Kotrschal, Alexander Hayward, Severine D. Buechel, Josefina Zidar, Hanne Lovlie, Niclas Kolm. 2015. Comparative support for the expensive tissue hypothesis - Big brains are correlated with smaller gut and greater parental investment in Lake Tanganyika cichlids. Evolution 69: 190-200.

Alexander Kotrschal, Séverine D. Buechel, Sarah M. Zala, Alberto Corral Lopez, Dustin J. Penn, Niclas Kolm. 2015. Brain size affects female but not male survival under predation threat. Ecology Letters 18: 646-652.

Stefan Fischer, Mathilde Bessert-Nettelbeck, Alexander Kotrschal, Barbara Taborsky. 2015. Rearing-Group Size Determines Social Competence and Brain Structure in a Cooperatively Breeding Cichlid. American Naturalist 186: 123-140.

Yu-Chia Chen, Peter W. Harrison, Alexander Kotrschal, Niclas Kolm, Judith E. Mank, Pertti Panula. 2015. Expression change in Angiopoietin-1 underlies change in relative brain size in fish. Proceedings of the Royal Society of London, Series B, Biological Sciences 282.

Wouter van der Bijl, Malin Thyselius, Alexander Kotrschal, Niclas Kolm. 2015. Brain size affects the behavioural response to predators in female guppies (Poecilia reticulata). Proceedings of the Royal Society of London, Series B, Biological Sciences 282: 116-124.

Alexander Kotrschal, Alberto Corral-Lopez, Soenke Szidat, Niclas Kolm. 2015. The effect of brain size evolution on feeding propensity, digestive efficiency, and juvenile growth. Evolution 69: 3013-3020.

Alexander Kotrschal, Eva J. P. Lievens, Josefin Dahlbom, Andreas Bundsen, Svetlana Semenova, Maria Sundvik, Alexei A. Maklakov, Svante Winberg, Pertti Panula, Niclas Kolm. 2014. Artificial selection on relative brain size reveals a positive genetic correlation between brain size and proactive personality in the guppy. Evolution 68: 1139-1149.

Alexander Kotrschal, Björn Rogell, Andreas Bundsen, Beatrice Svensson, Susanne Zajitschek, Ioana Onut Brännström, Simone Immler, Alexei A. Maklakov, Niclas Kolm. 2013. Artificial selection on relative brain size in the guppy reveals costs and benefits of evolving a larger brain. Current Biology 23: 168-171.

Alexander Kotrschal, Björn Rogell, Andreas Bundsen, Beatrice Svensson, Susanne Zajitschek, Ioana Brännström, Simone Immler, Alexei A. Maklakov, Niclas Kolm. 2013. The benefit of evolving a larger brain - big-brained guppies perform better in a cognitive task. Animal Behaviour 86: e4-e6.

Alexander Kotrschal, Katja Rasanen, Bjarni K. Kristjansson, Mike Senn, Niclas Kolm. 2012. Extreme Sexual Brain Size Dimorphism in Sticklebacks - A Consequence of the Cognitive Challenges of Sex and Parenting? PLoS ONE 7.

Alexander Kotrschal, Björn Rogell, Alexei A. Maklakov, Nichlas Kolm. 2012. Sex-specific plasticity in brain morphology depends on social environment of the guppy, Poecilia reticulata. Behavioral Ecology and Sociobiology 66: 1485-1492.

Alexander Kotrschal, L. Fredrik Sundström, D. Brelin, R. H. Devlin, Niclas Kolm. 2012. Inside the heads of David and Goliath - environmental effects on brain morphology among wild and growth-enhanced coho salmon Oncorhynchus kisutch. Journal of Fish Biology 81: 987-1002.