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Ultrasonic scanning for a Chinese sturgeon
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Working staff perform a computerized ultrasonic scanning for an endangered Chinese sturgeon yesterday at a fish raising center in Jiading District of Shanghai.

The sturgeon, in good health as the check shows, was found injured at the mouth of Yangtze River on July 17.

The Chinese sturgeon is one of the oldest vertebrates in the world and has existed for more than 200 million years. However, decreasing river levels and pollution have taken their toll on fish stocks. The number of sturgeon that migrate to the Yangtze each year to spawn has dropped from 2,176 in 1987 to just 500 now, said Chen Xihua, a researcher from the Yangtze River Fisheries Research Institute.

(Shanghai Daily, China.org.cn December 19, 2007)

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