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Re: Skewed sex ratio
Steve,
This question was answered several times in the past year. I'm surprised that no
one else on the list has mentioned it. Römer & Beisenherz (1995 & 1996) undertook
an exhaustive statistical study on the environmental causes of sex ratio
variations in Apistogramma, using hundreds of spawning of 37 different species of
Apistogramma plus two non-apisto control species. I can't go into all their
controls here, but there findings show that temperature during the first 30-40
days from spawning is the primary factor affecting sex ratios. pH was important
in only a few, mostly black water, species.
Mike Wise
Apflanzeneh@webtv.net wrote:
> Hi all,
> Quick question,what is the biggest factor determining sex ratio.
> Temp.
> Ph.
> Gh.
> Kh.
> Or a combination. Looks like my Alenquer fry are all little girls :(
>
> Any and all expieriences welcomed!
> Steve,in rainy van.
>
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