Re: NANFA-- Dambusia

Christopher Scharpf (
Sat, 01 Feb 2003 16:32:39 -0400

> 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?


According to the AFS's checklist of southeastern fishes, Gambusia affinis is
native to several drainages in Texas, including Galveston Bay, Brazos River,
Colorado River, San Antonio Bay, and Nueces River.

Obviously the species has been introduced throughout other parts of the

Chris Scharpf
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