Re: The Founder Selection Effect
- From: Tim Tyler <seemysig@xxxxxxxxxxxxxx>
- Date: Tue, 5 Feb 2008 20:11:45 -0500 (EST)
Anon. wrote:
Tim Tyler wrote:
The Founder Selection Effect:
``The founders may represent a non-random sample of the
original population. This is very likely to be true
when the founders have succeeded in penetrating a
challenging barrier which normally acts to prevent migration.
In that case the founders may be individuals with
exceptional capabilities - since they penetrated the
barrier before any of the other members of their species
managed to do so.''
- http://alife.co.uk/essays/the_founder_selection_effect/
This is quite well known now. For example, John Spence and colleagues
looked at the carabid beetle _Pterastichus melenarius_ invading North
America, and found a greater proportion of winged individuals at the
invasion front. More recently Ilkka Hanski's group have been looking at
the Pgi gene, and showing that different alleles are found in new and
old populations, and have been showing that the alleles have different
effects on metabolism, and dispersal.
Thanks.
I would describe those as pioneers, rather than founders, though.
Pioneers would normally be less unusual - since they face less of
a barrier.
Maybe there's still scope for a "pioneer effect".
--
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- From: Tim Tyler
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