Re: NANFA-L-- Re: the aquarium hobby as conservator of

Mysteryman (
Fri, 12 May 2006 14:00:55 -0700

Jerry Baker wrote:

> I'm pretty ignorant about the proper ways to go about eradicating
> exotic predatory fish from a watershed, but it seems to me that it
> could be accomplished piecemeal. You could start by fencing off
> sections of stream and eradicating whatever fish within that section
> and then moving the fence further on. If nothing else it seems like
> you could create refuges for the natives in this manner.
> /

That might almost work for big predators , ignoring the effect on the
stream ecology as a whole for the moment, but not all predators are
big. The Mosquitofish in this Barrens example would need a fence so
tight that the food for the BTM's would be cut off from them as well.

Oooohh.. wait.... what about one of those electric carp barrier
systems? What if the previous process of BTM removal & stream poisoning
were repeated to remove the Gambusia, and then an electric barrier
erected to keep the mosquitofish from returning to the area while not
impeding the flow of water & the food it brings to the BTM's? Is that
pure fantasy or an actual option?
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