NANFA-L-- H. formosa: more males than females

James E Newville (
Thu, 29 Jun 2006 15:23:28 -0400

Hi. I've been keeping some H. formosa in a 10 gallon tank since
Hurricanes Francis and Jeanne left a population stranded in my yard
almost two years ago. I probably have about three dozen, although its
hard to tell because of the vegetation. However, as far as I can tell, I
only have 3 females. The rest are males or fry too small for me to sex.
Can anyone tell me why I seem to have several times more males than

One thing I should add, is that I've been keeping this tank in the
garage, and it is very warm. (I plan to move it in the house soon.) Could
the temperature be affecting the sex ratio?


Jim Newville
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