Re: [RML] Dark half or quarter on rainbowfish

Bruce Hansen (bhansen at ozemail.com.au)
Wed, 6 Jan 1999 12:22:19 -1000

Although there is so far no evidence of TB being triggered by the cessation
of flow after the wet in the wet there is good evidence that there are a
whole host of other parasites and diseases that do increase. Whether this is
due to overcrowding, poorer water quality or just increased opportunity of
successful transfer of larval parasites because reduced volume between the
hosts and less time for the larvae to perish for whatever reason I don't
know.

I have seen the situation for example in the Coen River where the fish in
the main stream are free of lesions where the water is flowing but in the
waterholes to the side (which are no longer flowing) obvious skin and fin
lesions are evident and survival of the fish after capture and transport is
much poorer compared with those from the flowing parts.

Regards,
Bruce.

Bruce Hansen, A.N.G.F.A., Advancing Australian Aquatics.

Bruce Hansen, ANGFA, caring for our aquatic ecosystems.

Please visit us at http://www.ozemail.com.au/~fisher/angfa.htm

-----Original Message-----
From: Stephen Boulet <stepheb at comm.mot.com>
To: rainbowfish at pcug.org.au <rainbowfish at pcug.org.au>
Date: Thursday, 7 January 1999 1:56
Subject: Re: [RML] Dark half or quarter on rainbowfish

>[snip]
>
>> I would consider most aquariums to be less stressful than the real world.
>> But for a fish caught from the wild, the aquarium must introduce more
stress
>> points. My perceptions, not the fish's.
>[snip]
>
>I wonder. I was thinking that one thing different in tanks vs the wild
>is the greatly increased populaton density. (Can I say that for
>schooling fish?) How far does aggression go in the wild, when a fish can
>just swim away?
>
>I don't know what greater volumes of water in the wild, or even flowing
>streams, would mean for a fish's chances of exposure to pathogens vs in
>a tank.
>
>Stephen
>--
>
>Stephen Boulet, Grayslake, IL, USA
>spboulet at enteract dot com
>