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



Maybe if it's not soon we can just mail eachother the spare females/males and not worry about it... my ph was at 7.4 until recently when it dropped to 6.8. Very odd. They were kept pretty cool though, 74 degrees, and overcrowded. A dozen fry to juvies were raised in a one gallon container for a couple months til they were all juvie or young adult size. Really odd thing is they all looked pregnant though no male was seen. Maybe he got tired and jumped. Oh yeah, sorry, joking aside. But really, same deal with the guppies, all female and all pregnant? What are they, black widows?
Kate

haika@drizzle.com wrote:

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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