In article <1992Apr27.072849.17251 at yang.earlham.edu> allens at yang.earlham.edu (Allen Smith) writes:
> Actually, from what I know of the subject, differentiation by
>species via the hybridization success test is sometimes a matter of
>definition. There's one "species" ranging from someplace around Florida to
>Washington State, in which the ends can't interbreed. But the middle
>sections can do so, and the hybrids are quite successful.
Rana pipiens, the usual tree frog.
> Also, how does one decide where the species divisions are in the
>past? One can't exactly do a breeding experiment. Sometimes, enough DNA is
>isolatable to run a DNA hybridization check, but where does one draw the
>line? Admittedly, one way would be to look for hybrids. But what if the
>two species in question are seperated by time?
> -Allen
Also, what about ligers and tigons, coyotes, wolves, dogs, and jackals,
etc., etc.
--
Mark A. Fulk Computer Science Department
fulk at cs.rochester.edu University of Rochester
Omit needless words -- Strunk Rochester, NY 14627
