Originally Posted by Azhael
One huge difference with wild populations is that even if a particular population is highly inbred, itīs subject to selective pressures that will eliminate the worst effects or unsuitable individuals. In captivity that simply does not happen which makes it substantially worse because thereīs no refinement of the populations, no possitive selection.
I'm not so sure about this one, though. Life in captivity likely exerts its very own selective pressures. It's possible that we're slowly breeding a population that is particularly well adapted to, well, captivity :)
The question still remains, though: how can you know that two random kaiseri are not closely related? Doesn't just about everyone get their newts from one or two lines anyways?