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Artif Life 2000 Summer;6(3):227-35
On meme--gene coevolution.
Bull L, Holland O, Blackmore S.
In this article we examine the effects of the emergence of a new replicator,
memes, on the evolution of a pre-existing replicator, genes. Using a version
of the NKCS model we examine the effects of increasing the rate of meme
evolution in relation to the rate of gene evolution, for various degrees of
interdependence between the two replicators. That is, the effects of memes'
(suggested) more rapid rate of evolution in comparison to that of genes is
investigated using a tunable model of coevolution. It is found that, for
almost any degree of interdependence between the two replicators, as the rate
of meme evolution increases, a phase transition-like dynamic occurs under
which memes have a significantly detrimental effect on the evolution of genes,
quickly resulting in the cessation of effective gene evolution. Conversely,
the memes experience a sharp increase in benefit from increasing their rate of
evolution. We then examine the effects of enabling genes to reduce the
percentage of gene-detrimental evolutionary steps taken by memes. Here a
critical region emerges as the comparative rate of meme evolution increases,
such that if genes cannot effectively select memes a high percentage of the
time, they suffer from meme evolution as if they had almost no selective
capability.
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