RE: [RML] Body Sliders

Adrian R. Tappin (atappin at ecn.net.au)
Sat, 06 Jun 1998 06:11:50 +1000

At 16:45 4/06/98 -0400, Ralph wrote:
>Adrian, Belly sliders are simply fish with a swim bladder that is not
>properly formed. Several theories abound about the cause. Some folks
>will say the young fish did not get to the surface soon enough to "gulp"
>air and thus fill the bladder. I don't think that this is a good
>explanation because there is not a good opening directly into the
>bladder in most fish. I feel that the bladder fills with internally
>generated CO2 and something simply goes wrong with this system.
>It seems that when I force hatch fry there is a greater chance of
>getting bellysliders than if I water incubate. Perhaps these fish are
>simply too young to hatch and are not well developed enough to have the
>bladder developed completely.

Would you like to expand on your comments "when I force hatch fry"?

I was wondering if maybe a low oxygen level in the hatching water might be a
cause? The reason I ask is that like Mach, I generally handpick my eggs and
hatch them in small (4 litre) containers. Usually about half full with water
and added methylene blue.

Adrian.
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Adrian R. Tappin
"Home of the Rainbowfish"
http://www.ecn.net.au/~atappin/home.htm
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