Journal
MATHEMATICAL BIOSCIENCES
Volume 308, Issue -, Pages 81-104Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.mbs.2018.12.014
Keywords
Evolutionary dynamics; Nonlinear dynamics; Mathematical modelling; Game theory; Cooperation
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When a new type of individual appears in a stable population, the newcomer is typically not advantageous. Due to stochasticity, the new type can grow in numbers, but the newcomers can only become advantageous if they manage to change the environment in such a way that they increase their fitness. This dynamics is observed in several situations in which a relatively stable population is invaded by an alternative strategy, for instance the evolution of cooperation among bacteria, the invasion of cancer in a multicellular organism and the evolution of ideas that contradict social norms. These examples also show that, by generating different versions of itself, the new type increases the probability of winning the struggle for fitness. Our model captures the imposed cooperation whereby the first generation of newcomers dies while changing the environment such that the next generations become more advantageous.
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