[FRIAM] Rugged fitness landscapes

[Phil Henshaw]

Very interesting!   It's too much to digest all at once but his summary
of simulation experiments on p240 of
http://demo.cs.brandeis.edu/papers/watson_thesis_2002.pdf seems to show
the same kind of step transition I found empirically in the G.tumida
transition http://www.synapse9.com/GTRevis-2006fin.pdf, employing
mechanisms not incompatible with those I proposed, fitting the logical
necessities for the evidence of punctuated equilibria by providing a
means for comprehensive change by a rapid process with a smooth start
and end...


Phil Henshaw                       ¸¸¸¸.·´ ¯ `·.¸¸¸¸
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e-mail: pfh at synapse9.com          
explorations: www.synapse9.com    


> -----Original Message-----
> From: friam-bounces at redfish.com 
> [mailto:friam-bounces at redfish.com] On Behalf Of Jochen Fromm
> Sent: Monday, September 25, 2006 7:29 AM
> To: 'The Friday Morning Applied Complexity Coffee Group'
> Subject: [FRIAM] Rugged fitness landscapes
> 
> 
> 
> In his PhD Thesis titled "Compositional Evolution", 
> Richard A. Watson (now at Harvard University)
> argues that interdependencies between modules in
> the genotype of an evolutionary system are associated 
> with the ruggedness of the fitness landscape, see 
> http://www.oeb.harvard.edu/faculty/wakeley/ric> hard/index.html 
> 
> (Table 1-1 on page 9, Figure 3-3 on page 83 
> of his thesis)
> 
> * Weak interdependencies: 
>   smooth fitness landscape with a few optima
> * Modular interdependencies (between a few modules): 
>   a fitness landscape with some ruggedness
> * Arbitrary strong interdependencies: 
>   highly rugged landscape with many local optima
> 
> Looks plausible, but is there hard evidence for it ?
> Is this true in general for evolutionary systems ?
> 
> -J.
> 
> 
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