Caspian tigers may not be extinct
They travelled from China to Turkey and then to Siberia, where they might have resettled
TEN thousand years ago, the tiger reigned over Eurasia from the Sunda Islands of Indonesia to India to eastern Turkey and up north into Siberia. Environmental changes and human influence drove some of its subspecies--the Caspian, Balinese, Javan--to extinction. The Caspian tigers once prowled the Central Asian forests. The last survivor was shot down in Turkey in the 1970s. Or so it was believed. New dna evidence reveals that it might not be extinct at all. It might have travelled to Siberia and what we now know as the Siberian tiger might after all be the Caspian tiger.
When the Egyptians were still perfecting the art of agriculture, tigers were using the silk route to migrate from eastern China to the region around the Caspian sea. The last ice age was retreating, making the route usable for animals.After colonizing present day Turkey, the tigers travelled to Siberia.
Researchers from the UK, US and Israel analyzed mitochondrial dna from 20 samples of the Caspian tiger taken from museums around the world. Mitochondrial dna is useful for tracking ancestry as it is inherited from the mother and is passed on unchanged from generation to generation. The group found that the Caspian and Siberian tigers differed by just one group of genes located near each other on a chromosome. This indicated that the two were too closely related to be different subspecies.
The study compared the dna of Caspian tigers with that of other sub-species analyzed by an earlier study. A family tree was created. The tree showed the Indochinese subspecies has common genes with Caspian tigers. It also showed that the Siberian tiger is the youngest subspecies and is closely related to the Caspian tiger.
|Caspian tigers went to Turkey via the silk route|
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