Wednesday, July 16, 2008

Evolution solution?

Tasmanian Devils have been under threat from a contagious form of cancer which is usually fatal, killing the animals between the ages of 2 and 3. Usual life span for the devils is five to six years. But, as noted in Jurassic Park (and badly paraphrased here), nature will find a way - and scientists on the ground there have noted an increase in females breeding earlier than the usual 2 years old. This could mean that rather than being extinct within 25 years - such is the damage being done by the cancer - the Tasmanian Devil may well survive longer - giving researchers more time to find a vaccine or cure. According to researcher zoologist Menna Jones from the University of Tasmania, and her colleagues, this seems to be the first time an infectious disease has led to increased early reproduction in a mammal and they're suggesting in a paper in the current "Proceedings of the National Academy of Science" that "... there is likely to be strong selection for rapid evolution". Alas, the news reports I read on their findings did not say where Ms Jones was interviewed, except that it was by email. I'd like to think that she was on business in Darwin at the time (although that's unlikely given Darwin is at the other end of Australia!)

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