Quote:
Originally Posted by MonarchzMan
I don't know where you're getting that snapshot or freeze are not static. Those names inherently mean things do not change. And by that, we mean we do not want to change the frequency of alleles from the wild population at time of collection.
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I did not say that "snapshot" or "freeze" are not static.
On the contrary, I am suggesting that the breeding Guidelines under discussion do not maintain the ratios (or frequency) as you suggest. Please review the following to see how...
Quote:
Originally Posted by Toby_H
It was suggested I review the Punnet Square Chart and I have…
We are comparing a captive breeding program with a wild population, so we’ll need two charts…
Start both charts with the same breeding population that contains no aa’s and a few Aa’s…
Now on the wild chart, every time an aa is created, erase it. This will reflect the condition being lethal in natural environments thus these individuals do not survive to spawn… but in the captive chart do not erase it, apply it…
You don’t have to go very far to realize that eliminating something makes changes…
This will directly alter the allele ratio…
So in the case that a condition is lethal in wild population but is not lethal in captive environments… please explain how this example is inaccurate.
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In post #99 Ed confirmed the above quote would in fact disrupt allele ratios…
Quote:
Originally Posted by Ed
Quote:
Originally Posted by Toby_H
I’m not suggesting there is going to be mass change in a short period of time. I am only suggesting that over the course of a few captive bred generations, allowing individuals who would not have bred in the wild, to breed in captivity, would allow a shift in expressed alleles.
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Only if the ratio of those alleles changes in proportion to the total number of animals in the program. If the population increases proportionally then the increased survivial doesn't matter as the proportion of those alleles remains the same in the population. |
In the above quoted scenerio, removing the aa's from the wild population and not removing the aa's in the captive population alters the ratio of big A's to little a's when comparing the two populations...
Please note: when I say "remove the aa's from the wild population" I am not suggesting human culling. This represents a condition being lethal in native condition, which was stated as criteria originally. Not removing the aa's in the captive population represents no human culling which is per the TWI guidelines.
