RE: bent spines/was Winter 1967

["Genade Tyrone <tgenade at sun_ac.za>" <tgenade at sun_ac.za>]

The odds are that those soft plastics contain estrogen disrupting compounds (EDCs) that are effecting the development of the fish. Many EDCs are very toxic: eg. DDT.

As calcium signalling is very important in development any compound effecting calcium metabolism (i.e. estrogen, testosterone and EDCs) can alter development and has the potential to cause problems.

I doubt this is the problems with Epiplatys. They probably have a nutrional defeciency. I have the same problem with my lineatus. I am yet to solve it but all the data we have suggests the problem is nutrional. I suspect vitamin D rather than C as my fish are fed loads of spirulina flake.

tt4n

Tyrone Genade 

http://tgenade.freeshell.org
Ph: +27-021-558-1753 (h); +27-021-808-5876 (w); +27-084-335-4977 (c) 
P450 Lab, Department of Biochemistry, University of Stellenbosch, Matieland 7602, South Africa 

"Seek your happiness in the Lord" Psalm 37:4 



> -----Original Message-----
> From: David Lains [mailto:david at zfin_org]
> Sent: Monday, August 04, 2003 9:10 PM
> To: killietalk at aka_org
> Subject: RE: bent spines/was Winter 1967
> 
> 
> Hi Bill
> 
> We have problems with zebrafish and bent or missing tails.  
> The culprit has
> been soft plastics with rubberizers.  The gaskets on 
> bulkheads are really
> bad.  If you raise fish in a static tank with a bunch of these rubber
> washers in the bottom the fish end up missing everything 
> beyond the caudle
> peduncle (no tailfin).  If you raise them with less exposure 
> they end up
> with bent tails.
> 
> Food for thought.  Soft plastics are bad for fish.  New vinyl air line
> tubing kills baby zebrafish in a matter of hours.  We are 
> using silicone
> tubing now.
> 
> Best fishes
> David
> 
> 
> ><{{{>-----Original Message-----
> ><{{{>From: owner-killietalk at aka_org 
> [mailto:owner-killietalk at aka_org]On
> ><{{{>Behalf Of william ruyle
> ><{{{>Sent: Sunday, August 03, 2003 6:18 PM
> ><{{{>To: killietalk at aka_org
> ><{{{>Subject: Re: bent spines/was Winter 1967
> ><{{{>
> ><{{{>
> ><{{{>Tim Addis wrote:
> ><{{{>>Bill, the message was innocent enough. Why it got bounced
> ><{{{>around is unknown
> ><{{{>>to me
> ><{{{>>Why does - 'Well done, keep it up' envoke an anti 
> abuse program.
> ><{{{>>Perhaps I'm innocent to the ways of the world.
> ><{{{>
> ><{{{>Yeah, innocent as a newborn lamb....
> ><{{{>Don't know if you're still up at this hour (Dave toddled off
> ><{{{>2 hours ago)
> ><{{{>but I've got a problem
> ><{{{>with bent spines (angling downward at the caudal fin) of a
> ><{{{>growing out batch
> ><{{{>of Ep sexfasciatus Rathkei.
> ><{{{>All save 2, present this way. Regular water changes every 2
> ><{{{>days at least,
> ><{{{>and feeding BBS, moena, frozen chopped blood worms 
> (when larger) and
> ><{{{>earthworm flake. They are in a tank with filtered light thru
> ><{{{>a north window.
> ><{{{>I've grown out several batches of Chromos with no problems
> ><{{{>and am wondering
> ><{{{>if I should have softened the water more, or is it just
> ><{{{>tired, worn-out
> ><{{{>genes? Any ideas/thoughts are
> ><{{{>appreciated.
> ><{{{>
> ><{{{>Bill
> ><{{{>
> ><{{{>________________________________________________________
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