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The researchers used a list of 21 river species of "conservation concern" identified by the Wildlife Institute for India. Ganges river dolphins emit clicks frequently and rely strongly on echolocation to find their way around. According to the Red List Of the International Union for the Conservation of Nature (IUCN), this subspecies has a conservation status of endangered. The study, led by researchers from the University of Exeter, with an international team including researchers from India and Bangladesh, was conducted as part of the National Geographic Society's "Sea to Source: Ganges" expedition. The Ganges River dolphin distribution is limited to the east of India. This dolphin usually swims with a fin touching the riverbed to feel the sediments since animals hide there. Family: Platanistidae ", Using our site | Freedom of Information | Data Protection | Copyright & disclaimer | Privacy & Cookies |. The distribution range of the During the flooding season, this dolphin leaves the main canals and reach the temporary tributaries and flooded lowlands. …the Ganges river dolphin (Platanista gangetica) and the Indus river dolphin (P. minor), which are classified as endangered species, and the Atlantic humpbacked dolphin (Sousa teuszii), which is classified as critically endangered. Food: Fish, shrimp and other bottom-dwelling invertebrates. The Ganges river dolphin has a beak, which can be as long as 18 in (46 cm), and has up to 120 teeth. Once it finds a suitable prey, it holds the victim with the jaws and begins to swallow it whole starting from the head so that the scales (if the prey has them) do not hurt its throat. "Ingesting plastic can harm wildlife, but our threat assessment focussed on entanglement, which is known to injure and kill a wide range of marine species.". Your opinions are important to us. "Ingesting plastic can harm wildlife, but our threat assessment focussed on entanglement, which is known to injure and kill a wide range of marine species.”. Surveys along the length of the river, from the mouth in Bangladesh to the Himalayas in India, show levels of waste fishing gear are highest near to the sea. The Ganges river dolphins has a long, slender snout and a very low, ridge-like dorsal fin. The maximum size of a female is 2.67 m and of a male 2.12 m. Females attain sexual maturity at an age of 10-12 years, while the males mature earlier. Pradesh), Ghaghra and Gandak Rivers (Bihar and Uttar Pradesh), Ganga River, from Varanasi to Patna (Uttar Pradesh An adult has a length between 2 and 2.2 meters, and it has an approximate weight of 51-89 kilograms. The first breeding occurs between six and ten years of age and females give birth once every 2 or 3 years. Your support will help us build a future where humans live in harmony with nature. Its eyes are tiny. Threats and Conservation. Our latest podcast episode features popular TED speaker Mara Mintzer. The maximum size of a female is 2.67 m and of a male 2.12 m. "A high proportion of the fishing gear we found was made of nylon 6, which is valuable and can be used to make products including carpets and clothing," she said. This site uses cookies to assist with navigation, analyse your use of our services, and provide content from third parties. During the rainy season, this dolphin ventures into the tributaries of the river and returns to the main canals in the winter. The Ganges river dolphin is primarily found in the Ganges and Brahmaputra Rivers and their tributaries in India, Bangladesh, and Nepal, while the Indus river dolphin is now found only in the main channel of the Indus R… "Many held the view that the river 'cleans it away', so one useful step would be to raise awareness of the real environmental impacts.". You can unsubscribe at any time and we'll never share your details to third parties. The content is provided for information purposes only. Specifically, this species has the following characteristics: Morphology. Apart from any fair dealing for the purpose of private study or research, no It can dive for a maximum of 3 minutes at a time, but usually remains underwater for about 45 seconds. – Shrimp. Your feedback will go directly to Science X editors. Text available under a Creative Commons licence. It is not known the process of courtship and mating, and a calf is born 8 to 12 months after the intercourse more frequently between December and January and between March and May. "The Ganges River supports some of the world's largest inland fisheries, but no research has been done to assess plastic pollution from this industry, and its impacts on wildlife," said Dr. Sarah Nelms, of the Centre for Ecology and Conservation on Exeter's Penryn Campus in Cornwall. In order to navigate the river and find food this dolphin uses echolocation which allows it to use echos to find objects in the environment and determine its size, dist… The contamination of the Ganges river comes from chemicals, garbage, residual waters and industry spills. But the cause is not entirely lost, as the Indian Wildlife Protection Act looks for the protection of this species as a priority. The Ganges River dolphin and its closely related subspecies, the Indus River dolphin, have an appearance quite different from that of oceanic dolphins. – Gobio. Food & Agriculture Org., 1978. http://animaldiversity.org/accounts/Platanista_gangetica/, Designed by Elegant Themes | Powered by WordPress. All the river dolphins are small for cetaceans, with long slender beaks and prominent rounded foreheads. Ganges river dolphins once lived in the Ganges-Brahmaputra-Meghna and Karnaphuli-Sangu river systems of Nepal, India, and Bangladesh. A case study was carried out in the Buriganga River from December 2012 to November 2013. The reason is unknown. Indeed, these dolphins have very small deep-set eyes that lack lenses and are probably only useful for detecting light and dark. googletag.cmd.push(function() { googletag.display('div-gpt-ad-1449240174198-2'); }); The study says entanglement in fishing gear could harm species including the critically endangered three-striped roofed turtle and the endangered Ganges river dolphin. ", Professor Koldewey added: "This is a complex problem that will require multiple solutions—all of which must work for both local communities and wildlife.". The upper Ganga River (in Uttar Pradesh), Chambal River (Madhya Pradesh and Uttar The Ganges river dolphin was officially discovered in 1801. Fishing nets—all made of plastic—were the most common type of gear found. Author of the picture: Whymper and P. Smit Lydekker, Richard. This work is in the public domain. The study says entanglement in fishing gear could harm species including the critically endangered three-striped roofed turtle and the endangered Ganges river dolphin. Ganges River dolphins live in different river systems of Bangladesh—both inland and estuaries. Speaking about the why so much fishing gear was found in the river, Dr. Nelms said: "There is no system for fishers to recycle their nets. By using our site, you acknowledge that you have read and understand our Privacy Policy However, the aquatic mammal, which … But the species is extinct from most of its early distribution ranges. Its eyes are not useful to find food because in the muddy waters of its habitat they are not required, that is, it is an animal functionally blind, so it uses echolocation to detect prey. The South Asian river dolphin (Platanista gangetica) is an endangered freshwater or river dolphin found in the region of Indian subcontinent, which is split into two subspecies, the Ganges river dolphin (P. g. gangetica, ~3,500 individuals) and the Indus river dolphin (P. g. minor, ~1,500 individuals).

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