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U.S. Expert Studies Gharial Deaths
By GIRIRAJ AGARWAL
This winter, villagers at the National
Chambal Sanctuary near Etawah in Uttar Pradesh were stumped by the
large-scale deaths of gharials in the Chambal River. The World Wide Fund
for Nature-India estimates that more than 100 gharials died in a period of
two and a half months since December. Was it because of climate change? An
infectious disease?
Brian Stacy, a veterinary pathologist from the University of Florida, flew
to India to join international and local experts to find out what killed
the reptiles. The Switzerland-based World Conservation Union has moved
gharials (Gavialis gangeticus) from endangered to critically endangered
status. Two years ago, it says, fewer than 235 adult gharials swam in the
rivers, mostly in India and Nepal, snapping up small fish with a swiping
motion of their long snouts.
Stacy, who first came to India in 1998-99 as a student at the Madras
Crocodile Bank in Chennai, Tamil Nadu joined the other experts on a
40-kilometer tour of the Chambal River, examining live and dead gharials.
They soon found one cause of death: the toxic waters at the confluence of
the Chambal and the Yamuna.
"We found that the gharials had evidence of kidney failure," says Stacy.
"Various findings suggested a toxin is involved. Toxicological studies are
ongoing."
But then, why were only gharials dying? And only large ones, 1.6 to 4.1
meters long? "One theory is the fish they are eating are the source of
toxins. But this needs to be investigated," says Stacy.
The specialists met top officials, including the chief ministers, of the
Uttar Pradesh and Madhya Pradesh governments and will prepare a report
with suggestions on how to save the remaining gharials.
"The Yamuna did not get polluted in a day. It's a long-term problem and
the solution is going to be equally long term," says Stacy. "Such a
catastrophe may help stimulate action."
Courtesy: SPAN Magazine |
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