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Re: KillieTalk Digest V3 #70
BizEcology at aol_com wrote:
> > In an evolutionary sense neither would make much sense, since if she's past
> > breeding age, there's no way selection could ever operate on a sex change.
> No, no, no... you miss my point. The female changes to male APPEARANCE, not
> functionality. That way the males do not see her as a mate and do not waste
> time chasing her. I have seen old female swordtails develop swords many
> times. they never breed again, nor do they chase females. They just get
> left alone.
But still there's no evolutionary advantage to not being chased. It is hard
to see how this would evolve since can do nothing to affect her fitness. I
guess that interpreting the trait as functional in this way when it confers no
advantage doesn't seem right, that's all I meant.
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