Another dolphin has been found dead in a tributary of the Halda River.
The dead dolphin, about six feet in length and weighing around 70kg, was found floating below a culvert near a canal in Chittagong’s Hathazari upazila.
Two other dolphins were found dead in the river on January 3 and 5 with injury marks on their bodies.
Researchers say pollution, use of dredgers, shallow water and plying of mechanized boats are contributing to reducing the dolphin population in Halda River.
Also Read- Halda Dolphins in peril
Two types of dolphins are found in Bangladesh - Irrawaddy dolphin (Orcaella brevirostris) and gangetic dolphin (Platanista gangetica).
The official status of the river dolphins, locally known as Shushuk (Platanista gangetica) is “critically endangered” as per the International Union for Conservation of Nature (IUCN) Red List.
The IUCN Red List of Threatened Species is a universally recognized index of the world’s endangered animals.
According to Halda River Research Laboratory, at present, the number of river dolphins will not exceed 1,200 across the globe. Of the total number, some 250 dolphins are found in the Halda River.
The bodies of as many as 15 dolphins were found floating in the Halda River in the last three months.