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Transience in the Simulation of Ring Species Daniel Ashlock and Taika von Konigslow and Elizabeth Clare and Wendy Ashlock

Summary: Transience in the Simulation of Ring Species
Daniel Ashlock and Taika von Kšonigslšow and Elizabeth Clare and Wendy Ashlock
Abstract-- Biological ring species theoretically develop when
an ancestral population expands around a geographic barrier
and differentiates until terminal populations come back into
contact. Adjacent populations are fertile; fertility declines with
distance, and the terminal populations are not fertile. This study
uses evolutionary algorithms to attempt to create artificial ring
species using grid robots performing the Tartarus task with
ISAc lists and string genes solving the Self Avoiding Walk
(SAW) problem. Three experiments are done with the Tartarus
robots. Fertility is shown to decrease with distance, but not to
the extent that ring species are formed. Two experiments are
done with SAW. These experiments produce sub-populations
which satisfy all the criteria for biological ring species at the
point in time when the ring closes. As evolution continues,
the relationship between fertility and distance continues, but
the terminal populations do not remain infertile. In addition,
on both problems, record scores are achieved, suggesting that
this model of evolution is a good optimizer for multi-optima


Source: Ashlock, Dan - Department of Mathematics and Statistics, University of Guelph


Collections: Mathematics