Wednesday, March 26, 2008

Tuatara declared world's fastest evolving animal

Tuatara declared world's fastest evolving animal
By MICHAEL FIELD - Fairfax Media

Although tuatara have remained largely physically unchanged during very long periods of evolution, the researchers found the animals are evolving at a DNA level faster than any other animal

The discovery, reported in the international journal Trends in Genetics, was made by scientists at Massey University's Allan Wilson Center for Molecular Ecology and Evolution in Auckland.

They have taken DNA sequences from the bones of ancient tuatara up to 8,000 years old.
They reported the tuatara has the highest molecular evolutionary measured, changing than any other animal, including bears, lions, ox and horses.

Research found the tuatara is evolving at an average rate of 1.56 substitutions per nucleotide per million years.

This measurement puts it above the previous fast-evolving record holder, the Adelie penguin.
The paper was authored by Massey's Professor David Lambert and researchers Jennifer Hay, Sankar Subramanian, Craig Millar and Elmira Mohandesan.

They have measured the evolution rates of various species, and plan to extend their work to humans, sampling DNA from human mummies from the Andes and Siberia.

source by

No comments: