The geographical range of this dolphin is vast, complex and fragmented, with some populations probably isolated for millions of years and having become genetically and morphologically distinct. Then use the blast button at the bottom of the page to align your sequences. The boto is the largest of the river dolphins with a maximum recorded body length of 255 cm and body mass of 207 kg for males and. Confluencethe mouth of a channel joining the main river. Pdf stomach content of a juvenile bolivian river dolphin. Pdf abundance estimate of the amazon river dolphin inia. The genus inia is currently considered monospecific, with three recognized subspecies.
Pdf we present results of the first simultaneous visual and acoustic surveys for amazon river dolphins inia geoffrensis and tucuxi sotalia. The newly described araguaian river dolphins, inia. Baby the amazon river dolphin or pink river dolphin, the last individual of its species and its whole family, iniidae in captivity outside its native range, at duisburg zoo germany. Geographical distribution of extant river dolpliins. Trees were constructed using the neighborjoining saitou and nei 1987 and unweighted pair. Molecular identification of evolutionarily significant units in the. Pdf attitudes and behaviors toward amazon river dolphins. They are an informal grouping within the order cetacea, excluding whales and porpoises, so to zoologists the grouping is paraphyletic. Use of boto inia geoffrensis as baite in fisheries in the. Use of boto inia geoffrensis as baite in fisheries in the central amazon vera m. Inia geoffrensis boto or amazon river dolphin can be found in the amazon and orinoco river basins and their main tributaries in bolivia.
This compilation brings together current information on the status of asian freshwater cetacean populations, the factors that have caused their recent declines, and what can be done to. This compilation brings together current information on the status of. The boto is the largest of the river dolphins with a maximum recorded body length of 255 cm and body mass of 207 kg for males and 225 cm and approximately 153 kg for females. Mammal species of the world a taxonomic and geographic reference. The action plan for river dolphins in south america image. Population size estimates of pink river dolphins inia geoffrensis are critical to assess the conservation status of this species and the impacts of increasing human stressors in freshwater ecosystems.
Deborah duffield, riverside, california and were prepared from lymphocytes. The bolivian river dolphin faces a multitude of threats. Pdf thirtythree pink river dolphins inia geoffrensis were caught at eight sampling places one. The name was transmitted via the latin delphinus the romanization of the later greek delphinos, which in. Distribution and abundance of the river dolphin inia. Inia geoffrensis boliviensis dorbigny, 1834 bolivian river dolphin, bolivian bufeo subspecies inia geoffrensis geoffrensis blainville, 1817 amazon river dolphin, common boto. The amazon river dolphin, genus inia, is endemic to the major river basins of northern south america. Status, distribution and conservation of the river dolphins inia geoffrensis. Population size estimates of pink river dolphins inia geoffrensis using markrecapture methods on photoidentification population size estimates of pink river dolphins inia geoffrensis are critical to assess the conservation status of this species and the impacts of increasing human stressors in freshwater ecosystems.
The pink river dolphin is the largest cetacean to spend its time in fresh waters. Distribucion, uso del habitat, movimientos y organizacion social del boto colorado inia geoffrensis cetacea. Wildscreen s arkive project was launched in 2003 and grew to become the worlds biggest encyclopaedia of life on earth. Use of boto inia geoffrensis as baite in fisheries in. 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.
Pdf beluga delphinapterus leucas novel bubble helix. Dolphins are a widely distributed and diverse group of fully aquatic marine mammals. Photoidentifications of inia dolphins were collected between february 2007 and august 2009 in two locations of the colombian amazon and orinoco river basins. Brazilian amazon river dolphins inia geoffrensis are sitefaithful but show seasonal movements in and out of a study area in accordance with water level changes, i. The use of photoidentification to study the amazon river dolphin, inia geoffrensis, in the colombian amazon article in marine mammal science 103. Along with the orinoco, the amazon is one of the main habitats of the boto, also known as the amazon river dolphin inia geoffrensis. The freshwater dolphin inia geoffrensis geoffrensis produces. The stomach of the inia consisted of a forestomach, main stomach, connecting channel, and py loric stomach. The amazon river dolphins colouration is highly variable, affected by age and water clarity. Bolivian river dolphins were discovered by the western world in 1832 by french researcher alcide dorbigny. The stomach of the bou tu, inia geoffrensis, was examined macroand light microscopically, and was compared with those of the three other species of platanistidae as well as with those of some sea dolphins. The newly described araguaian river dolphins, inia araguaiaensis.
The term dolphin usually refers to the extant families delphinidae the oceanic dolphins, platanistidae the indian river dolphins, iniidae the new world river dolphins, and pontoporiidae the brackish dolphins, and the extinct lipotidae baiji or chinese river dolphin. As inia acoustic repertoire has been underestimated in the literature. The amazon river dolphin, inia geoffrensis, is classified as endangered by the iucn red list. Enter one or more queries in the top text box and one or more subject sequences in the lower text box.
Stomach content of a juvenile bolivian river dolphin inia geoffrensis boliviensis from the upper madeira basin, bolivia. The dolphins comprise the extant families delphinidae the oceanic dolphins, platanistidae the indian river dolphins, iniidae the new world river dolphins, and pontoporiidae. Attitudes and behaviors toward amazon river dolphins inia geoffrensis in a sustainable use protected area. Boto, pink river dolphin the boto is a mammal included in the cetacea order, odontoceti suborder and iniidae family. Boto, amazon river dolphin, boutu, pink river dolphin, bouto, bolivian river dolphin, orinoco river dolphin. Inia geoffrensis vernacular names edit wikidata amazon river dolphin english. Improving river dolphin monitoring using aerial surveys esa journals. O genero foi considerado monoespecifico por muitos autores, incluindo apenas o inia geoffrensis. Whether these differences are sufficient to justify the recognition of multiple subspecies. Pdf microgeographical genetic structure of inia geoffrensis in the. The suns rays make the dolphins lose their pink pigmentation so the darker the water, the more pink they will be. To get the cds annotation in the output, use only the ncbi accession or gi number for either the query or subject. World heritage encyclopedia, the aggregation of the largest online encyclopedias available, and the most. Distribution and abundance of the river dolphin inia geo.
Fisheries also pose a threat to the dolphins, for fishermen might see the dolphins as competition for fish. The boto is a bulky mammal but with a body with a very hydrodynamic structure. Similarly, gewalt 1989 observed orinoco freshwater dolphins inia geoffrensis in managed care utilizing a scrub brush as a tool to create bubble curtains as the brush was passed through the. The freshwater dolphin inia geoffrensis geoffrensis. Overfishing, deforestation, and hydroelectric construction are all major factors in the current population decline. The bolivian river dolphin was briefly thought to be a subspecies as i. The topographic organization of retinal ganglion cells was examined in the florida manatee trichechus manatus latirostris to assess ganglion cell size and distribution and to estimate retinal resolution. This chapter explores the amazon river dolphin commonly known as boto. Pdf landbased station studies of aquatic mammals in. With the help of over 7,000 of the worlds best wildlife filmmakers and photographers, conservationists and scientists, featured multimedia factfiles for more than 16,000 endangered species. Inia geoffrensis, a species of freshwater dolphin endemic to the amazon river system 2008 april 1, henry fountain, carrying a torch, or at least sprigs of grass, in new york times.
Amazon river dolphins were until recently considered to be of one species by most authors, inia geoffrensis. The freshwater dolphin inia geoffrensis geoffrensis produces high frequency whistles laura j. A new genus and species of extinct inioid odontocete meherrinia isoni is based on nine partial crania that probably originated from the late miocene marine eastover formation in north carolina, u. Ini nga species ginbahin ha masunod nga subspecies. A new genus and species of late miocene inioid cetacea. They were collected from the riverbed of the meherrin river, a tributary of the chowan river. Ganglion cell distribution and retinal resolution in the. An inia geoffrensis in nahilalakip ha genus nga inia, ngan familia nga iniidae. Inia geoffrensis humboldtiana orinoco pontoporia blainvillei b platanista minor indus j figure 1. The animals name can therefore be interpreted as meaning a fish with a womb. Amazon river project gutenberg selfpublishing ebooks.
Ossification of the mesethmoid and the tight interdigitation of many sutures indicate that these. Median joining network with the mtdna control region. The casiquiari channel is considereda barrier for i. Sequences of inia geoffrensis, which belongs to a different family than.
Aug 20, 2017 baby the amazon river dolphin or pink river dolphin, the last individual of its species and its whole family, iniidae in captivity outside its native range, at duisburg zoo germany. Colours range from whitegrey with a pink dorsal ridge and lighter below to a vivid pink. Sep 30, 2016 one of three inia records attributed to english wikipedia species page is genuine and the other two records are from denormalised classification. The common name, boto, is the portuguese name for this animal. The pink dolphin inia geoffrensis is widely distributed along the amazon and orinoco. Biology and conservation of freshwater cetaceans in asia.
The generic name inia, is a bolivian word for dolphin. The amazon river dolphin inia geoffrensis, also known as the boto, bufeo or pink. The use of photoidentification to study the amazon river. Ginklasipika han iucn an species komo kulang hin datos subspecies. Population size estimates of pink river dolphins inia. But in a group where one boto puts on a display, there was much more tailwhacking, biting and other aggressive behavior among the males. A large dolphin, inia geoffrensis, of the amazon river. The boto is a mammal included in the cetacea order, odontoceti suborder and iniidae family. The bottom karyotype was prepared with the asg technique. One of three inia records attributed to english wikipedia species page is genuine and the other two records are from denormalised classification. Seasonal movements of river dolphins inia geoffrensis in. The specific name, geoffrensis, is named for the french zoologist etienne geoffroy sainthilaire 17721844. Dolphin is a common name of aquatic mammals within the order cetacea, arbitrarily excluding whales and porpoises.
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