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Re: Alpha Male Breeding Success

Doug,

        I know you have more training by far than I do in genetics.  I am
not fully following the math here on the loss of diversity.  So, I'm asking
for a bit more clarification.  If I have a group consisting of males A and B
and females X and Y and A is dominant, then we would intuitively expect B to
be unsuccessful in passing on his genes.  All offspring from the group would
be either AX or AY genetically.  If B is sneaky enough to get his genes into
the mix, then some fry would be BX and BY and some would still be AX and AY.
To me that looks like an increase in genetic diversity.  It also seems that
if the pairs are separated into two tanks, A with X and B with Y, then the
offspring will be limited to AX and BY.  This also seems like a loss of
total genetic diversity.  Can you more fully explain how this is actually
not true, and results in less genetic diversity?  Thanks.

Jay Moylan

----- Original Message -----
From: "Doug Karpa-Wilson" <dkarpawi at indiana_edu>
To: <killietalk at aka_org>
Sent: Wednesday, December 13, 2000 12:17 AM
Subject: Re: Alpha Male Breeding Success


>
> >
> >        I stand by what I said about the unexpectedly high success rate
of
> >non-dominant males in the spawning of many species.  Some species have
> >25-50% success by non-dominant males in species with clearly dominant
alpha
> >males who violently repell competitors
> >Jay Moylan
>
>
> More than you'd expect, as in more than zero.  The simple fact remains
that
> gangspawning where some of the males are getting only 50% of their share
> means that you are losing the genetic diversity quite a bit faster than if
> you bred them individually.
>
> Doug
>
> Doug Karpa-Wilson
> Department of Biology
> Indiana University
> Jordan Hall
> 1001 E. 3rd St.
> Bloomington, IN 47405
>
>
> ---------------
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>

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