Arne Traulsen studies evolutionary game theory and evolutionary dynamics in finite biological populations. His work uses mathematical models to separate the effects of individual interactions, population structure, and chance in natural selection.[ref]
https://www.evolbio.mpg.de/person/12087. Max Planck Institute for Evolutionary Biology profile; research interests
With Martin A. Nowak, Traulsen constructed a 2006 model of group selection in which only individuals reproduced. Offspring stayed in the parent's group; a group reaching a size limit could split, displacing another group. Cooperation could lower an individual's success against nonhelpers within its group while increasing its group's rate of growth and splitting.[ref]
Evolution of cooperation by multilevel selection by Arne Traulsen and Martin A. Nowak. PNAS 103, pp. 10952–10955; model and Figure 1
The model supplies an illuminating distinction between levels of description. A trait's frequency can fall within mixed groups yet rise in the combined biological population when more cooperative groups contribute more descendants. Specifying the reproduction and splitting rules made this proposal testable by calculation and simulation, rather than inferring an evolutionary advantage solely from a benefit to the group.[ref]
Arne Traulsen
. Photograph by Michael Hesse, identified and credited on the Max Planck institutional profile. Articles by others on the same topic
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