AW: Gender Ratio

["Erik Pfingstner" <erikpfingstner at freenet_de>]

thanks John,

this is perhaps the missing ingredient. Do you know what temperature this
friend of yours raised his annulatus to get more females?

Erik


> -----Ursprüngliche Nachricht-----
> Von: owner-killietalk at aka_org [mailto:owner-killietalk at aka_org]Im
> Auftrag von John Wubbolt
> Gesendet: Sonntag, 29. Dezember 2002 17:13
> An: killietalk at aka_org
> Betreff: Re: Gender Ratio
>
>
> 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 .....
>
> John
>
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