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Please excuse my ignorance but I am only a minor league politician (who is
sending this by bcc to some major league politicians). My understanding of
electrofishing (other than using electricity to stun and capture fish) is
that electricity can also be used as kind of fence for fish containment in
open water. In other words it substitutes for the kind of pen which is
typically used here on the BC coast. But the pens now used contaminate the
surrounding water. So I was asking if there are electric fences which can
be used in open water and serve the same purpose as closed
containers...basically aquaria.

FWP

On Fri, 4 Oct 2002, James B. Reynolds wrote:

> >But isn't the idea of a closed containment system that there is no
> >contamination of the surrounding water? Do electrofishing tanks
> accomplish
> >that?
> >
> >FWP
> >
> In my experience, no one has ever used a closed holding tank while
> electrofishing just to avoid contamination of the water body. The fish and
> water  in the tank are from the water body itself and would not be a source
> of contamination other than diseases or toxins already contained therein.
> If the tank itself was a source of pathogens or toxins, there is a bigger
> issue to deal with than the one of closed vs open tank systems!
>
> Closed systems are usually used in electrofishing because the tanks are
> small and can be easily aerated (fish are usually not held for very long so
> a large tank is generally not needed). However, electroshock is stressful
> and a poor holding environment makes recovery even more difficult.
> That's why I always recommend a flow-through system with at least a
> partially-closed lid; you get ambient temp and oxygen while providing
> "cover" to help the fish recover.
>
>
>
>
>
> Dr. James B. Reynolds
> Emeritus Professor of Fisheries
> School of Fisheries and Ocean Sciences
> University of Alaska Fairbanks
> P.O. Box 757220
> Fairbanks, Alaska 99775
>
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