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> From: caryho at ix.netcom.com
> To: rainbowfish at pcug.org.au
> Subject: Re: [RML] swim bladder disroder
> Date: Thursday, 25 September 1997 9:11
>
> In The Dawn of the Third Age Mach Fukada <tuhoitc at aloha.net> woke me
> from my contemplation by writing:
>
> >Just wondering out loud. I have noticed a few of my Pseudomugil fry
seem
> >to have difficulty swimming horizontally. They seem to be swimming head
up
> >and tail down. Is this like the swim bladder disroder that is often
> >described by Killifish breeders? Water poblem? embryonic development
> >problem? Genetic disorder? Pathogenic Disease? I kinda don't think
that
> >it is the last, but the fry don't seem to get over it. I haven't seen
it
> >on melanotonaids. I have noticed it on Ps. furcata and Ps. conniea.
I
> >do get a small percentage of deformities (scrunched bodies ala ballon
> >mollies, crooked spine, etc) that may be a result of Ca deffieincies or
> >inbreeding (I don't think these species have been recollected inrecent
> >history).
>
> Hi Mach
> I've seen this problem in many species and not just rainbows. Seems
> the swim bladder never fills with air and the fry expend all their
> energy just trying to swim. I've heard bows need to get a gulp of air
> to fill it shortly after hatching. But this may not be the true cause,
> but just a unfounded hypothesis. But I have heard reports of whole
> batches of fry coming up this way. This would lead me to guess that
> something in the water was out of balance, or the parents weren't in
> good enough condition and produced weakened fry. I've never had a
> whole batch go this way so its only a guess.
>
> later
> Cary Hostrawser
>
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>
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