Re: Alex's gibbon-like Ca

J. Moore (
Tue, 14 Nov 95 17:01:00 -0500

PC> you do that you are just into tautology. *Without* going back a
PC> stage, only a very small proportion of species arise from EC.

AD> A note about the Galapagos finches. Some recent work there has been done
AD> that noted some divergent selection in a finch species (into large-billed
AD> and small-billed populations -- and not even geographically isolated).
AD> If selection had continued in the manner in which it had been occuring,
AD> two new species would likely have appeared, where there had only been one
AD> before. What was the mediating factor? Climatic change. I don't have
AD> the reference for this right on the top of my head, but I'll find it for
AD> you.
AD> Alex Duncan

The recent popular book *The Beak of the Finch* gives a good
and very readable account of these changes, and also lists the
refs at the back.

Jim Moore (

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