> >From: "Bob Bock" <bockhouse_at_earthlink.net>
> >Reply-To: nanfa_at_aquaria.net
> >To: <nanfa_at_aquaria.net>
> >Subject: Re: NANFA-- FW: fish for experiments
> >Date: Thu, 8 Nov 2001 07:39:45 -0500
> >
> >They're so tough, though, that they might not show any ill effects.
> >Perhaps
> >fatheads?
> That's why mummichogs were originally used, because they are tough enough
to
> survive almost anything except genuine toxicity. The most interesting
recent
> fieldwork I've seen with them was in New Bedford harbor in MA. This area
is
> incredibly polluted with PCBs, and in the inner harbor the only fish that
> seems to thrive is the mummichog. Some people in the lab of Steve Palumbi
at
> Harvard were doing a genetics study of these fish compared to other
> populations and found that there was significant genetic change
(adaptation)
> in the New Bedford fish that seemd to enable them to survive in this
> environment. Introducing other mummichogs into equivalent conditions in
the
> lab would quickly kill them, while the New Bedford fish went about their
> business.
>
> Interestingly, the same genetic change in response to sustained pollution
> has been found in some populations of the Central Stoneroller, Campostoma
> anomalum.
>
> --Bruce Stallsmith
> Huntsville, AL, US of A
>
>
>
> _________________________________________________________________
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>
>
>
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/----------------------------------------------------------------------------- /"Unless stated otherwise, comments made on this list do not necessarily / reflect the beliefs or goals of the North American Native Fishes / Association" / This is the discussion list of the North American Native Fishes Association / nanfa_at_aquaria.net. To subscribe, unsubscribe, or get help, send the word / subscribe, unsubscribe, or help in the body (not subject) of an email to / nanfa-request_at_aquaria.net. For a digest version, send the command to / nanfa-digest-request_at_aquaria.net instead. / For more information about NANFA, visit our web page, http://www.nanfa.org