Subject: | |
From: | |
Reply To: | |
Date: | Fri, 28 Dec 2018 09:57:10 -0800 |
Content-Type: | text/plain |
Parts/Attachments: |
|
|
> And please let's not veer off to a discussion of race, that's not my
intention.
Species and races are subjectively-applied human taxonomical terms, but
clearly illustrate how local niche adaptation occurs in many populations of
organisms. Recent studies with stickleback fish indicate how such
adaptations can occur in even a few generations.
The experience of bee breeders supports this--one can shift a breeding
population's prevalence of color, defensiveness, or hygienic behavior (as
examples) in only a few generations, if you apply strong enough selective
pressure.
A recent scientific article (can't remember which) pointed out the reason
that there are so many "rare" species. It's apparently because generalists
(such as C mitotype honey bees) tend to dominate when conditions are
"normal." Locally-adapted subgroups have greater success at survival when
conditions are unfavorable in a certain area. Should those conditions
unfavorable to the generalists persist, the resultant selective pressure
favors the evolution of races or separate species.
--
Randy Oliver
Grass Valley, CA
www.ScientificBeekeeping.com
***********************************************
The BEE-L mailing list is powered by L-Soft's renowned
LISTSERV(R) list management software. For more information, go to:
http://www.lsoft.com/LISTSERV-powered.html
|
|
|