Peter wrote

> The other thing we have discussed in the past is the possibility that 
> varroa in isolated colonies become inbred and suffer inbreeding 
> depression, while the isolated > bees are still able to get out and 
> outcross, creating vigor.

If as Denis Anderson says that varroa started on mellifera because one mite 
rcognized the signal to reproduce on mellifera, why would there be any more 
inbreeding in an isolated area compared to the whole population which 
started from one mite?

Trevor Weatherhead
AUSTRALIA

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