What are the chances of inbreeding?

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Offline Don_1

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What are the chances of inbreeding?
« on: 24/04/2013 14:30:20 »
Some animals (such as wolves, lions & elephants) prevent the chance of inbreeding by chasing off the young males as they near maturity, though this may not prevent the chance of the father breeding with the daughter.

In other other animals (such as wilderbeast) which form large herds, there may always be a chance of inbreeding. Other, solitary, animals (such as tortoises) leave it to chance.

In a healthy population and unadulterated habitat, what might the chances be of brother and sister mating?
In a healthy population but restricted habitat, what might be the increase in the chances of this happening?
In a reduced population in a restricted habitat would the chances be so high as to make it very liable?

Here in the UK, the chances of a red squirell getting to mate with another from a different region are somewhere between slim and not a hope in hell, since groups of them have become isolated by a sea of human habitation and intervention. Does this add to our native squirells' problems? Could inbreeding, forced by circumstances introduced by man, be their ultimate demise?

Can we, should we intervene by taking young males from their home patch to be distributed in other populations they would otherwise not be able to reach?
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Offline menageriemanor

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Re: What are the chances of inbreeding?
« Reply #1 on: 25/04/2013 12:42:23 »
Does this help?

Bottleneck and Foundation populations


Is there a red squirrel society?  I would think so.  Perhaps they could keep records, and do some shuffling of young males, under expert supervision? It can mean there are outcrosses to go to, recorded for assurance. I know there is talk and some action, for planting trees to allow traffic of more species to meet up. There are hedgehog underpasses, and toad/frog/reptile underpasses, which, if landscaped, to attract those species, are quite successful. Just so sad it is needed.

Male lions, wolves, don't just chase away their young adult males.  They are also regularly challenged by roaming brothers and individuals, now prideless, in the case of lions.  The stress of alpha male guarding of female access, etc., means they don't rule for long periods.