15-17 September 2019
MPI for Evolutionary Biology, Plön
Europe/Berlin timezone

Why is cyclic dominance so rare?

15 Sep 2019, 16:30
Lecture Hall (MPI for Evolutionary Biology, Plön)

Lecture Hall

MPI for Evolutionary Biology, Plön

August-Thienemann-Str 2, Plön, Germany


Hye-Jin Park


Natural populations contain multiple types of coexisting individuals.
Individuals interact with each other affecting the death and birth of them, and this interaction structure shapes population composition.
Some interaction structures support the coexistence of multiple diverse types, while others favour one the and drive all others to extinction.
A paramount example of structures supporting diversity is a cyclic dominance, illustrated by the rock-paper-scissor game.
This cyclic dominance structure has attracted a lot of attention because multiple types can coexist without direct mutualism.
However, traditional work assumes a predefined set of cyclically dominated types, while the formation of a cyclic dominance from evolution has not been studied well.
We develop the model of an evolving population and study the formation of the cyclic dominances.
Our results show that the cyclic dominances emerge rarer than non-cyclic dominances.
We also address in which circumstance cyclic dominances are enhanced and suppressed.

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