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River dolphins are rather small, ranging in size from the 5-foot (1.5 m) long South Asian river dolphin to the 8-foot (2.4 m) and 220-pound (100 kg) Amazon river dolphin. They all have female-biased sexual dimorphism apart from Amazon river dolphin, with the females being larger than the males.
The Xinhua News Agency announced on December 4, 2006, that no Chinese river dolphins were detected in a six-week survey of the Yangtze River conducted by 30 researchers. The failure of the Yangtze Freshwater Dolphin Expedition raised suspicions of the first unequivocal extinction of a cetacean species due to human action [ 53 ] (some extinct ...
Iniidae is a family of river dolphins containing one living genus, Inia, and four extinct genera.The extant genus inhabits the river basins of South America, but the family formerly had a wider presence across the Atlantic Ocean.
Male Amazon river dolphins are either solid pink or mottled grey/pink. The Amazon river dolphin is the largest river dolphin. Adult males reach a maximum length and weight of 2.55 metres (8.4 ft) (average 2.32 metres (7.6 ft)) and 185 kilograms (408 lb) (average 154 kilograms (340 lb)), while females reach a length and weight of 2.15 metres (7. ...
Articles relating to the river dolphins, a polyphyletic group of fully aquatic mammals that reside exclusively in freshwater or brackish water. They are an informal grouping of dolphins, which itself is a paraphyletic group within the infraorder Cetacea. Extant river dolphins are placed in two superfamilies, Platanistoidea and Inioidea.
A common bottlenose dolphin (Tursiops truncatus). A dolphin is an aquatic mammal in the clade Odontoceti (toothed whale).Dolphins belong to the families Delphinidae (the oceanic dolphins), Platanistidae (the Indian river dolphins), Iniidae (the New World river dolphins), Pontoporiidae (the brackish dolphins), and possibly extinct Lipotidae (baiji or Chinese river dolphin).
It is one of the three river-based dolphin sanctuaries in Padma-Jamuna confluence, the others being the Nazirganj Dolphin Sanctuary and the Shilanda-Nagdemra Dolphin Sanctuary. [1] The area of the sanctuary is 408.11 ha (1,008.5 acres). [2]
Species Inia araguaiaensis – Araguaian river dolphin; Species Inia boliviensis – Bolivian river dolphin; Species Inia geoffrensis – Amazon river dolphin; Species Inia humboldtiana – Orinoco river dolphin; IUCN Classification. Genus Inia. Species Inia geoffrensis – Amazon river dolphin. Amazon Subspecies I. g. geoffrensis; Bolivian ...