Yes, to both of your questions! The fish are found in the same drainages,
but have distinct differences in habitat preferences!
F. olivaceus are usually found in the shallows, preferably sunlit areas,
while F. euryzonus prefer the deeper, shaded areas of the same creek/river!
Maybe that this is how they maintain their purity of races, as it
were..........But, in a controlled environment, it has been shown by an LSU
graduate (Thomas Blanchard, in his thesis paper) that they can and will
hybridize....
Regards,
BG
----- Original Message -----
From: unclescott <unclescott_at_prodigy.net>
To: <nanfa_at_aquaria.net>
Sent: Tuesday, October 28, 2003 12:02 PM
Subject: Re: NANFA-- RE: WWMD & Fundulus
> B.G. Granier noted
>
> > Mark McCrae and I sampled two sites in Louisiana on Saturday, October
18th
> 2003. We took measurements and also sampled the fish life that was present
> at both sites. Included in the samples were the following species:
> >
> > N. longirostris
> > F. olivaceus
> > F. euryzonus
> > E. coerulum
> > P. sciera
> > L. chrysocephalus
> > P. gambusia
> >
> > We submitted our water sampling data to the World Water Monitoring Day
> site...
>
> Hi B.G.,
>
> Were the F. olivaceus and the F. euryzonus found in exactly the same spot?
> Was there a difference in the habitat or depth of the water where they
were
> found?
>
> I realize water parameters were your priorities, but have you noticed that
> there are certain types of habitat which are reliably associated with
either
> euryzonus or olivaceus?
>
> Thanks and all the best,
>
> Scott
> Park Forest, IL Fundulus notatus country
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