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Re: Gender Ratio
- To: killietalk at aka_org
- Subject: Re: Gender Ratio
- From: BigJohnW at webtv_net (John Wubbolt)
- Date: Sun, 29 Dec 2002 11:12:50 -0500 (EST)
- In-reply-to: Charles n Sue Harrison <csharrison at inkmaker_net>'s message ofSun, 29 Dec 2002 09:59:11 -0600
I would like to add my experiences to this thread...
A few years back i raised literally thousands of annualatus..... I kept
the CI 91 strain, which was very prolific, also kept the Kasewae Forest
population and even worked with "true" Monroviae populations.
I raised my fish in my tap water , soft and acidic, keeping them in pH
of 6.0 and <60 ppm hardness, temps in the range of 78 - 80 F. By doing
this i normally had sex ratios that gave me more males then
females...... A fellow killie keeper, Howard Berg, also worked with the
same populations of Annualatus and raised his fish in his tap water, pH
of 7.6 and hardness around 180ppm and would get more females then
males...... this worked great for both of us as we would trade males for
females..... Hence this leads me to believe that like several other
epiplatys i worked with, pH and hardness had more to do with sex ratios
then temperatures did..... I not giving any scientific facts or studies
here, just my personal opinions.
I hope this helps someone .....
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