I know that beaver incisors grow continuously. Is is a
feasible case, that the teeth grow too fast for the animal to wear
them out by active chewing the wood, and may prevent the other back
teeth from complete closure? I found a skull of a young beaver (less
than two feet long including the tail)in good condition and when
cleaned and assembled it, this is what I was surprised to notice. The
huge front "tasks" were preventing the back "molar" teeth from closure
and kept them at the distance of about 1/2". Could this be the cause
of the death of the young animal? Another question: could beaver teeth
continue to grow after death of the animal, like our nails and hairs?
This could also explain my finding.
Answering the second question first, no, the teeth would not grow
after the animal died.
I have not seen beaver skulls as you describe, but have seen them with
deformed front incisors that caused the jaw to not close properly, and
would probably have caused the animal to starve to death.
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Update: June 2012