Q. What method was employed during the 2019 dolphin census in the Upper Ganga region?
Answer: Tandem Boat Survey
Notes: In 2019, the Tandem Boat Survey method was used for the dolphin census in the Upper Ganga region, which spans about 250 kilometers from Hastinapur Wildlife Sanctuary to Narora Ramsar Site. This innovative technique, created by ecologist Gill Braulik, involves two boats moving in sync to effectively count dolphins. The census was a joint effort by WWF and the Uttar Pradesh Forest Department.