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Re: pH sexratio Pelvicachromis
Jacques,
In general, this is correct. Lower pH values produce more Pelvicachromis males. However
each species or form has a different pH value where you produce equal numbers of males
and females. The Common Krib (Pv. pulcher) has a 50/50 ratio at around pH 7. The Giant
Krib (Pv. sp. aff. pulcher) has a 50/50 ratio at around 6.3. At this same pH (6.3) you
get 75%+ male Pv. pulcher. The secret to getting the proper ratio of males and females
depends upon finding each species' preferred pH value.
Mike Wise
Jacques BESSON wrote:
> Is the influence of the pH about sexratio on the fry of this fish the same as to
> apisto ?
> The study of Romer , about Apisto, concludes ( if I remember correctly) : " Low pH
> (5.5 and below) produced more males", and influence of temperature is more
> significant than pH.
> An idea about ?
> Thanks
> J.Besson
>
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