Wildlife Conservation Efforts

Annual Ganges River Dolphin Census

Note4Students

From UPSC perspective, the following things are important :

Prelims level : Gangetic Dolphin

Mains level : Conservation of Gangetic Dolphin


  • The annual Ganges river dolphin census site has begun.

Annual Ganges River Dolphin Census

  • It is undertaken by World Wide Fund for Nature-India in collaboration with the Uttar Pradesh Forest Department.
  • It is being held along the 250-km-long riverine stretch of Upper Ganga between Hastinapur Wildlife Sanctuary and Narora Ramsar.
  • Unlike previous years, when direct counting method was used, this year the tandem boat survey method is being used.

What is Tandem Boat Survey Method?

  • Here the officials use two inflated boats which move in tandem to count the dolphins.
  • After collating the data, statistical tools are employed to arrive at the final count.
  • The method is developed by the renowned river and marine ecologist Gill Braulik, provides a more accurate count of the endangered species.
  • This new method is likely to yield more accurate count of the endangered species

Back2Basics

Gangetic Dolphin

  • Gangetic river dolphins fall under Schedule I of the Indian Wildlife (Protection) Act.
  • It has been declared an endangered species by the International Union for Conservation of Nature (IUCN).
  • The Gangetic river species found in India, Bangladesh and Nepal is almost completely blind.
  • It finds its way and prey using echoes with a peculiar ‘su-su’ sound being everything for them to navigate, feed, escape danger, find mates, breed, nurse babies and play.
  • Like bats, they produce high-frequency sounds which help them ‘see’ objects when the sound waves bounce off them.
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