Re: pH, temp and sex ratios

[salS <chas33@optonline.net>]

Andy,
My experience on this subject is that temp and pH will only affect the sex
development 7 days post hatch.  I found that by raising the temperature to
84 I would get a high %'age of males. I spawned the Nijsseni at 80 and 7.1
pH and got approx. 65 % Fem and 35% males.
Only my view, hope this helps.
sal
----- Original Message -----
From: <andy.d.marshall@btinternet.com>
To: <apisto@listbox.com>
Sent: Wednesday, October 17, 2001 6:49 AM
Subject: pH, temp and sex ratios


> Hello All,
>
> I have a trio of A.Nijessni and currently have a batch of fry that are
about 12 weeks old and still with the parents. Throughout these 12 weeks the
water conditions have aways been temp 78F and pH between 5.5 & 6, which I've
monitored after researching, in the attempt to get as equal a sex ratio as
possible. Now the question, one of the females has eggs again, so I was
going to try and take the (12 week) fry out and raise them up in a different
tank before selling them on. My tank conditions are far different to the lfs
(pH 7 - 7.5) so was wondering after how long the sex of the fry are fixed,
so I can adjust their conditions accordingly over time.
>
> Any help will be appreciated.
>
>
> Andy
>
>
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