NANFA-L-- Het formosa sex

Gerald Pottern (
Mon, 3 Jul 2006 12:41:21 -0700 (PDT)

I see the same thing in my outdoor tub - few if any
young female Het formosa-in-the end of summer.
Indoors i get maybe 1/3 females, 2/3 males.

PS - does anyone konw if Het formosa will interbreed
with Neoheterandria elegans ? Just wondering if i
need to be real careful about not letting these 2 get
mixed. (so far so good) Charley Grimes and Jim
Langhammer werent sure.


Date: Thu, 29 Jun 2006 16:26:57 -0400
From: "Bruce Stallsmith" <>
Subject: RE: NANFA-L-- H. formosa: 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

Yes, many (most?) fishes are much more influenced by
temperature than genetics for sex determination.

- --Bruce Stallsmith
the sunny Tennessee
Huntsville, AL, US of A
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