India’s river dolphin survey uses hydrophones and echolocation signals
20 Jan, 2026
India’s river dolphin survey uses hydrophones and echolocation signals
Unit 8 — Information and Communication Technology (ICT)Unit 9 — People, Development and Environment
What Happened?
The Union environment ministry rolled out the second rangewide estimation of riverine and estuarine dolphins. Researchers used underwater microphones or hydrophones to detect acoustic signals because river dolphins are difficult to observe directly. The method complements conventional field observation.
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