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Curved Spines
In other fish (rainbows, livebearers, etc) it can be the result of a
Mycobacterium (fish TB) infection, which in many cases isn't all that rapid
in spread from tank to tank, usually takes a bit of time and proper
conditions (poor water conditions, etc) to start an epidemic. Also can
infect fish keeper (ask Wright). May also be a mineral or vitamin
deficiency. Things like calcium, vitamin C are recorded as to causing
similar disorders in other fish. Also other factors like food quality and
source. Once upon a time I was breeding hundreds of Pseudomugil furcatus in
Honolulu. Temps were warm and growth was rapid and feed was almost 100%
brine shrimp (when 90% hatch grade eggs were $16 a pound). I would see a
few fish with very deformed spines. We did some work and fed them a higher
quality, commercial aquaculture feed, they grew faster, more colorful, but
had even more deformed fish. I suspect that it is possible to make a fish
grow too fast and thus make calcium deficiency symptoms appear as calcium
uptake can not increase beyond a certain point (sort of like causing blossom
end defects in tomatoes by over fertilizing with nitrogen, plants and fruit
grow too fast for calcium uptake also).
However to really look into things, we need to know, what species of fish,
what you are feeding them, how old are they (I have had some fish that
develop this as a result of old age, calcium problem like people or TB flare
up as immune system become impaired). , temp and water conditions....... I
am sure that raising a cool water species at warmer conditions will cause
some problems (I have seen this with Diapteron cyanostictum) similar to the
described conditions...
MTF
----- Original Message -----
From: "-RJ-" <TranquilityBase at NetZero_Net>
To: <killietalk at aka_org>
Sent: Tuesday, April 17, 2001 3:21 PM
Subject: RE: Nice software
>
> Hi Folks,
>
> I have had an interesting experience with a few fish over the past year or
> so. I notice that some fish tend to develop curvature of the spine.
Usually
> when I have not kept up with my water changes. Despite their bent backs
they
> seem to do fine otherwise. Can water conditions actually caused hump back
> killifish? The condition does not seem to spread to other fish in the
tank.
> If you have seen it before, what water conditions are likely to cause this
> deformity?
>
> Best regards,
>
>
> -RJ-
>
>
>
>
> NetZero Platinum
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