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Re: BCF vs BADD
> I am not seeking to be critical, but I wonder if a bird has the time
> (evolutionary speaking) to evolve into a larger size and not be so heavily
> preyed upon; while evolving, that the population cannot sustain itself. Is
> not one of Dr. Gould's hypotheses in his theory of "puncuative equilibrium"
> (my spelling will get me on this one), that isolated populations are more
> likely to evolve into new species? It would seem to me that a likely
> scenario would be an isolated population that is being selected for increased
> size to take advantage of new prey resources at a time that they have no
> predators themselves.
"Isolation" used in terms of speciation means isolation of a
population from the rest of its species. It does not refer to other
species or ecosystems. The same predators could be present in the
isolated group's area.