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Re: Sex Ratios -- OOPS!
I've 12 spoorenbergi 3 weeks old and I've kept then at 75 degrees...
Does this mean I'll have only females?
I'm going to raise now the temperature to 78 F!
Am I too late? Do you have any information about the exact moment when the
temperature affects the sex ratio? Perhaps soon after the birth?
At 06:31 AM 2/22/2002 -0800, you wrote:
>You may remember my attempts at getting male
>spoorenbergi fry. I was running 50-60 females for
>every male. I set up 2 5 gallon tanks with temperature
>being held at 78 degrees. Well fry are growing out
>nicely in those tanks, and there are at least 1/2
>males in each tank, maybe more males than females. Two
>control tanks with the temp floating between 70 and 74
>have given me my usual all females out of about 40
>fry. Temperature is definitely part of sex ratio
>problems. The sensitivity to the temp probably varies
>by species, but I think it is still there.
>I kept a lot of measurement records on this test that
>I will work up into something mre informative.
>djramsey30045 at yahoo_com
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