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Re: Determination of frys' sex
Since most people raise their fish at the same
temperature that they incubate their killie eggs,
there has not been a hobbyist study published on
whether temperature of incubation or temperature of
raising determines gender. I doubt that there has
been a scientific study of this "problem" either.
However, there have been a number of studies which
seem to indicate that it is the temperature of egg
incubation which determines gender in crocodilians.
It probably is temperature of incubation, but that is
only a guess.
--- Kean Huat Yeap <keanhuat at yahoo_com> wrote:
> Hi group. I'm always wondering at what stage of the
> eggs/frys development that the sex of the frys is
> 1) It's determined when an egg is fertilized by the
> sperm. Or
> 2) It's determined when the embroys are developed
> (during the incubation period). Or
> 3) It's determined when the frys hatched out.
> Some people mentioned that temperature will
> the sex ratio of the frys. But is it the temperature
> during the incubation period or temperature during
> fry stage?
> Just being very curious,
> Kean Huat
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Allen H. Johnson
132 Whispering Oaks Dr.
West Chester, Pa. 19382
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