NANFA-L-- Big female red shiner turns red-blue

Gerald Pottern (
Mon, 2 Jan 2006 08:43:07 -0800 (PST)

Hi Tony - ive seen female shiners, dace, and
apistogrammas start to look male-ish as they get old.
my old rainbow shiners get hard to sex on color -
belly shape becomes a better indicator. it might be
in part a hormonal change related to the social
dominance of a big lady; maybe an evolutionary
pre-cursor to protogynous sex-change ??? I guess we
see it less in nature because a) they dont live as
long, and b) female social dominance is less important
in a river than in a little glass box. -gerald,
hangin on the neuse

Date: Mon, 02 Jan 2006 00:51:11 +0700
Subject: NANFA-L-- Big female red shiner turns

I had observed that some female red shiners I have
grow big and change their coloration from silvery to
light bluish with reddish cap similar to male [but
less intense]. Is this normal in nature too?

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