[6], They are also distributed in the basin of the Orinoco River, except the Caroni River and the upper Caura River in Venezuela. The issuance of these sounds is related to the time they return to the surface before diving, suggesting a link to food. The mythology is said to be the cycle of a baby. It is a relatively abundant freshwater cetacean with an estimated population in the tens of thousands. [22], Captive studies have shown that the Amazon river dolphin is less shy than the bottlenose dolphin, but also less sociable. It is a relatively abundant freshwater cetacean with an estimated population in the tens of thousands. You can find out more about rainforest animals here: Discover more amazing rainforest animals: Discover more amazing animals from all around the world. They can also shake their fins, and pull their tail fin and head above the water to observe the environment. 1) The amazon river dolphin is one of around 4 known species of freshwater dolphin. The calf measures about 80 cm (31 in) at birth. The reason for this is because total population size, population trends, and the exact impact of the various threats faced by the species are not clear. Join us to make change. The Amazon river dolphin is restricted to freshwater habitats. Dentition is heterodont, meaning that the teeth differ in shape and length, with differing functions for both grabbing and crushing prey. A plausible explanation of the results is that object-carrying is aimed at females and is stimulated by the number of females in the group, while aggression is aimed at other adult males and is stimulated by object-carrying in the group. Here are some facts about the Amazon River Dolphin. There is significant segregation during the rainy season, with males occupying the river channels, while females and their offspring are located in flooded areas. This subspecies is restricted, at least during the dry season, to the waterfalls of Rio Negro rapids in the Orinoco between Samariapo and Puerto Ayacucho, and the Casiquiare canal. The flippers and the flukes (the tail fins) of the dolphin are triangular and have ragged hind edges. By Nortondefeis (Own work) [CC BY-SA 4.0], via Wikimedia CommonsThe long, thin snout curls slightly downwards. Therefore, the Bolivian river dolphin is currently recognized as a subspecies. This may be why the Amazon river dolphin produces less powerful clicks compared to other similar sized toothed whales. [48], In September 2012, Bolivian President Evo Morales enacted a law to protect the dolphin and declared it a national treasure. [29], Amazon river dolphins are the most widespread river dolphins. The mercury reaches dolphins through the food chain. A recent study has shown, despite the claim of the seller and the belief of the buyers, none of these fetishes is derived from the boto. It has a melon on the head, the shape of which can be modified by muscular control when used for biosonar. branches & other vegetation) by adult males is thought to be a part of their mating behavior. However, they are predominantly crepuscular. Living in South American river systems is a hidden creature that is known to few but the locals. [32][33] One of these ecosystems is a floodplain, or a várzea forest, and is home to a large number of fish species which are an essential resource for human consumption. The Amazon River itself provides a huge and varied habitat for a vast number of animals. These animals belong to the Cetacea family. Washington, DC 20037. The dolphin moves between different habitats seasonally. [18][24] Due to the high level of prey fish, larger group-sizes are seen in large sections that are directly influenced by whitewater (such as main rivers and lakes, especially during low water season) than in smaller sections influenced by blackwater (such as channels and smaller tributaries). Known as “boto” or “bufeo” dolphin, it is found in the Amazon, Araguaia/Tocantins, and Orinoco river systems in South America. Instead the amazon river dolphin may be hunted by other animals that inhibit the Amazon. It is very curious and has a remarkable lack of fear of foreign objects. The dolphin's dentition allows it to access shells of river turtles and freshwater crabs. [8], Breeding is seasonal, and births occur between May and June. Acoustic analysis revealed that the vocalisations are different in structure from the typical whistles of other species of dolphins. [8], Males and females appear to have selective habitat preferences, with the males returning to the main river channels when water levels are still high, while the females and their offspring remain in the flooded areas as long as possible; probably because it decreases the risk of aggression by males toward the young and predation by other species. Follow the link below to find out more and to sign up! [45] Increasing demand for the piracatinga has created a market for distribution of the Amazon river dolphin carcasses to be used as bait throughout these regions. [5] Today, however, the Amazon river dolphin has been reclassified into the superfamily Inioidea. "[25] WWF also supports research about the impact of dams on the size and dispersal of dolphin populations. Previously, the species was rated ‘Vulnerable’. Click the picture above for more details & to view free sample pages! The Amazon river dolphin, also known as the pink river dolphin or boto, lives only in freshwater. [16]Inia geoffrensis humboldtiana[6] are located in the Orinoco River basin, including the Apure and Meta rivers. The pink river dolphin inhabits the basins of the Amazon and Orinoco River systems, meaning freshwater habitats in Ecuador, Bolivia, Brazil, Colombia, Guyana, Peru and Venezuela are teeming with these unique mammals. Freshwater Life: Amazon River Dolphin Habitat. It will also venture into flooded forests and plains, swimming among the roots of trees in search of food. The Amazon river dolphin (Inia geoffrensis), also known as the boto, bufeo or pink river dolphin, is a species of toothed whale classified in the family Iniidae. The most frequently consumed fish belong to the families Sciaenidae (croakers), Cichlidae, and Characidae (tetras and piranhas). 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