Japanese Technology may save India’s river dolphins, says WW

 
Japanese technology to track and monitor the India's endangered Ganga river dolphins using underwater acoustics will play a vital role in efforts to conserve the freshwater mammals,WWF-India said.
The Gangetic cetaceans are one of only four species of dolphins in the world that inhabit rivers and lakes and are much less common than their marine counterparts, numbering only around 2,000 in India, according to the conservation group.

Over the last 25 years, their numbers have halved
-Reuters.

(The Hindu, 10th February 2007)