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Re: Now Never returned to the wild
Well, I don't have a source for proof of the assertion that ich was
introduced via aquarium releases, but it is often stated as the most likely
source, as I stated previously. Ich is pretty rampant in North America, but
that wasn't always the case, but as you point out so eloquently, once a
disease organism gets into the wild it spreads.
Perhaps inbreeding has an effect upon the immune system of hatchery fish,
and I would venture to say that overcrowding probably increases the stress
level of the hatchery animals as well, but neither of these factors can
summon a disease into existence. These factors would aid the disease
organism in infecting the fish.
Norm
-----Original Message-----
From: Moontanman at aol_com <Moontanman at aol_com>
To: nfc at actwin_com <nfc at actwin_com>
Date: Thursday, July 09, 1998 8:46 AM
Subject: Re: Now Never returned to the wild
>My point is that disease is spread quite naturally from place to place even
>from one continent to another. I would like to see some proof that ich was
>introduced from aquariums to the wild in North America, it seems unlikely.
>Ich is pretty much universal in distribution and seldom has any real effect
in
>the wild on healthy fish populations. Some odd disease do turn up in fish
>hatcheries from time to time, mostly from the effects of inbreeding on the
>immune system of the subject fishes.
>
>
>Michael
>