Re: livebearer sex ratios (was) Re: [GSAS-Member] Using a Python

[haika@drizzle.com]

My Endler's tank pH is around 7.0-7.2. I get lots of males, but females as
well. There are too many in there to really get an accurate ratio (plus
they move around so much courting and dodging), but I'm gonna estimate a
2M to 1F ratio. I've learned that letting the pH drift below 6.8 means
dead Endler's.

Betty Goetz

> Hi Fran,
>
> Measure your pH and extropolate ;->
>
> Joking aside, try shifting your pH and see what you get. Even Endler's are
> not so sensitive they won't tolerate gradual change.
>
> June
>
>
> on 12/7/04 3:05 PM, auntie.fran@netzero.net at auntie.fran@netzero.net
> wrote:
>
>>
>> Good hearing from you, June!  You said: "My experience was that pH
>> infulences
>> gender ratio in live bearers. At first I thought it was water temp but
>> changing that made little if any difference but pH did."
>>
>> Now, please tell us, was it high pH or low pH that produced more
>> females?  I'm
>> really concerned about my lack of female Endler's.  I don't want to lose
>> my
>> entire colony because they're producing only male offspring.
>>
>>
>>
>> Growing old is inevitable; growing up is optional.
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