Dolphin population declines in sanctuary

BHAGALPUR: The population of the endangered Gangetic river dolphin has declined at the Vikramshila Gangetic Dolphin Sanctuary, India’s only sanctuary for its national aquatic animal. A survey in December 2017 found that the number of dolphins had declined to 154 from 207 in 2015. The movement of big cargo vessels in the river and dredging activities could have impacted the number of dolphins, an official said. Dolphins prefer water that is at least 1.5-2.4 metres in depth. IANS