I did some RFLP work on Gambusia affinis populations in Texas in the early 90's (not published) assuming that I was looking at relatively native populations.
Since then I've been told by an authorative source that the populations in texas are introduced and not native. Originally the populations were restricted to Florida and the south Gulf Coast east of the Mississippi. I have not seen that in the literature nor on the USGS web site. Does anyone have insight on this?
John
>
> Just to finish the thought about rainbow darter population genetics, the
> group I referred to includes Ray, Wood and Simons from St. Louis Univ.
> (first 2) and Univ. Minnesota (Simons). They sequenced the cytochrome b gene
> of the mitochondrial DNA for comparative purposes. Various people have
> claimed as many as five species in this "complex" but Ray et al.'s work
> didn't support that.
>
> In honor of that, chopped earthworms for everyone!
>
> --Bruce Stallsmith
> Huntsville, AL, US of A
>
> >From: "Todd Crail" <farmertodd_at_buckeye-express.com>
> >Reply-To: nanfa_at_aquaria.net
> >To: <nanfa_at_aquaria.net>
> >Subject: Re: NANFA-- mmmmmmm....
> >Date: Thu, 30 Jan 2003 23:07:45 -0500
> >
> >Very interesting. I guess if "sumpin' ain't broke.. no need to adapt" huh?
> >:)
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