Re: raising fry in different temps?

[Wright Huntley <huntley1 at home_com>]

LEO ARIEUX wrote:
> 
> Doug:
> 
> That's an interesting question. I thought that if temperature was to
> have any affect on the sex ratio, it would only do so when
> the eggs were unhatched. As in turtles,
> alligators.....some reptiles, I'm far from sure about all reptiles.
> 
> I have heard of sex changes in fish when they were older but am unsure
> what activates this change (possible askewed
> sex ratio) but have never heard of changes taking place on the scale you
> would need.  IMHO of course.  Possibly you could check with Wright, if
> anyone would know he probably would. I'd be interested in what you find
> out.

Don't ask me. I've heard all the rumors you have. I'm pretty convinced that
some rivulus don't fix their sex until after hatching, and that temp. plays
a role. I'm less convinced pH has anything to do with it.

Sex is not as certain in fish as in mammals, as they don't have a specific
sex chromosome, like we do. A quick visit to the Castro over in SF will show
that even *then* sex is confusing. ;-)

Wright

-- 
Wright Huntley, Fremont CA, USA, 510 494-8679  huntleyone at home dot com

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References:

• Re: raising fry in different temps?
• From: HOLLIS1506 at webtv_net (LEO ARIEUX)

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