In brazil it is known as the boto, botovermelho, or botocorde rosa, and. Inia geoffrensis vernacular names edit wikidata amazon river dolphin english. Vocalizations of amazon river dolphins, inia geoffrensis. This compilation brings together current information on the status of. Pdf microsatellite loci for population and parentage. The amazon river dolphin is distributed throughout the amazon and orinoco rivers and their tributaries. Vocalizations of amazon river dolphins inia geoffrensis. The amazon dolphin or bouto, inia geoffrensis blainville, occurs throughout much of the amazon and its principal affluents and in the orinoco as well. Ecological factors influencing group sizes of river dolphins. A 1998 classification listed a single species, inia geoffrensis, in the genus inia, with three recognized subspecies. Brill chicago zoological society, brookfield zoo, brookfield, illinois 605, u. Morphology of the pectoral girdle in the amazon dolphin inia geoffrensis with special reference to the shoulder joint and the movements of the flippers. O genero foi considerado monoespecifico por muitos autores, incluindo apenas o inia geoffrensis.
Placentation in dolphins from the amazon river basin. Pdf abundance estimate of the amazon river dolphin inia. While every effort has been made to provide the most reliable and uptodate information available, ultimate legal requirements with respect to species are contained in. This page was last edited on 8 december 2014, at 06. 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.
Inia geoffrensis geoffrensis blainville, 1817 amazon river dolphin, common boto. 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. Pink dolphins inhabit tropical freshwater lakes, ponds, rivers, streams and flooded forest. Attitudes and behaviors toward amazon river dolphins inia geoffrensis in a sustainable use protected area. The stomach of the inia consisted of a forestomach, main stomach, connecting channel, and py loric stomach. Ini nga species ginbahin ha masunod nga subspecies. Bolivian river dolphins were discovered by the western world in 1832 by french researcher alcide dorbigny. An inia geoffrensis in nahilalakip ha genus nga inia, ngan familia nga iniidae. The total population size estimate for rightleft side individuals was 12971 inia dolphins cv0. Manual hematological techniques were employed by a single trained individual for all the measurements. Caldwell marineland of florida, route l, box 122, st.
Population estimate and identification of major conservation threats for the river dolphin inia geoffrensis humboldtiana at the colombian orinoquia. Reproductive parameters of the amazon river dolphin or boto. Genetic diferentiation sic in populations of the river dolphins genus inia blainville, 1817 and apports to the taxonomic status with. It was originally distinguished from the amazon river dolphin inia geoffrensis in january 2014 on the basis of nuclear microsatellite and mitochondrial dna data as well as differences in skull morphology it generally has a wider skull. The freshwater dolphin inia geoffrensis geoffrensis produces high. Pdf status and conservation of river dolphins inia geoffrensis and. Boto, amazon river dolphin, boutu, pink river dolphin, bouto, bolivian river dolphin, orinoco river dolphin.
Population sizes of inia and sotalia were estimated for different habitats main river, tributary, lake, island, confluence, and channel. Amazon river dolphin, boto or pink river dolphin inia geoffrensis may refer to the following downloads. Abstract the history of inia geofrensls in the united states covers a period ofthree decades which is characterized. In this study, we described the acoustic repertoire of this newly discovered species in concert with their behaviour. The international union for conservation of nature red list used to categorize the orinoco river dolphin as vulnerable. Inia geoffrensis geoffrensis central amazon river basin. We observed 778 inia geoffrensis, 1,323 inia boliviensis, and 764 sotalia fluviatilis. Oct 18, 2016 boto inia geoffrensis october 18, 2016 mrichey animals. Largely forested with numerous channels and lakes, mamiraua comprises a variety of seasonal floodplain habitats known collectively as varzea. Pdf population estimate and identification of major. Amazon river dolphin inia geoffrensis facts about animals. We studied inia at the mamiraua sustainable development reserve in central brazilian amazonia. You are about to meet a sea creature who is seat to become a handsome. Files are available under licenses specified on their description page.
Pdf density, abundance and group size of river dolphins. Hematologic profile of amazon river dolphins inia geoffrensis and its. Itis taxonomy is based on the latest scientific consensus available, and is provided as a general reference source for interested parties. Males were on average 16% longer and weighed 55% more than females, demonstrating that this species is one of the most sexually dimorphic of all cetaceans for size. 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. Inia geoffrensis boliviensis dorbigny, 1834 bolivian river dolphin, bolivian bufeo. Features shared by inia and sotalia include a reproductive cycle determined by the annual flooding cycles of the amazon. Status, distribution and conservation of the river dolphins inia geoffrensis and sotalia spp. 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.
Pdf hematologic profile of amazon river dolphins inia. Examination of the intact lipids, the derived fatty acids and the derived fatty alcohols by gas chromatography reveals that the blubber triglycerides show characteristics of freshwater fish fats, but the. Effort from 1999 to 2009 is displayed showing an increasing trend over time. Hematologic profile of amazon river dolphins inia geoffrensis and its variation during acute capture stress. Habitat use by the boto, or amazon river dolphin inia geoffrensis, was investigated in and around the mamiraua reserve, brazil. Inia geoffrensis in captivity in the united states melba c. Additional considerations on the taxonomy of the genus inia. Inia geoffrensis, for which whistles have been reported but not well documented.
The newly described araguaian river dolphins, inia. Inia geoffrensis mammalian species oxford academic. Pink river dolphins inia geoffrensis, listed as data deficient by the iucn, are widely distributed in the amazon and orinoco river basins, except for areas of rapids or extensive ecosystem. Toothed whales produce echolocation clicks with source parameters related to body size. Examination of the intact lipids, the derived fatty acids and the derived fatty alcohols by gas chromatography reveals that the blubber triglycerides show. The amazon basin hosts two, very different, dolphinsthe boto or amazon river dolphin inia geoffrensis and the smaller tucuxi sotalia. The boto is a mammal included in the cetacea order, odontoceti suborder and iniidae family. All structured data from the file and property namespaces is available under the creative commons cc0 license.
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. However, it is not a legal authority for statutory or regulatory purposes. A total of 291 line and 890 strip transects were conducted, covering a distance of 2,704 linear kilometers. Toothed whales have evolved to live in extremely different habitats and yet they all rely strongly on echolocation for finding and catching prey.
Inia geoffrensis, amazon river dolphin english, boto. Inia geoffrensis blainville, 1817 is a cetacean that lives in rivers and lakes in amazonia. Morphology of the pectoral girdle in the amazon dolphin inia. Dec 26, 2019 download fulltext pdf download fulltext pdf. Amazon river dolphins were until recently considered to be of one species by most authors, inia geoffrensis. Jan 29, 2007 whistle production in the freshwater dolphin, the boto inia geoffrensis geoffrensis, has been controversial. We examine the degree of overlap between the distributions of two river dolphin species boto inia geoffrensis and tucuxi sotalia fluviatilis and hydroelectric projects and provide an initial quantification of impacts. The orinoco river dolphin inia geoffrensis humboldtiana is included in appendix ii of the convention on international trade in endangered species of wild fauna and flora.
It is thought that inia entered south america in the miocene, at which. Whether these differences are sufficient to justify the recognition of multiple subspecies. Ginklasipika han iucn an species komo kulang hin datos subspecies. This chapter explores the amazon river dolphin commonly known as boto. Morphology of the pectoral girdle in the amazon dolphin. Map of the distribution of inia geoffrensis in the orinoco river basin in venezuela. The annual cycle of flooding in this region amplitude 1115 m. The boto is a bulky mammal but with a body with a very hydrodynamic structure. Here we characterize vocalizations of the amazon river dolphin inia geoffrensis, for which whistles have been reported but not well documented. The organism appears to be immunologically distinct from members of the recognized lancefield groups of streptococci. Such biosonarbased foraging involves distinct phases of searching for, approaching and capturing prey, where echolocating animals gradually adjust sonar output to actively shape the flow of sensory information.
Insights on the use of dolphins boto, inia geoffrensis and tucuxi, sotalia fluviatilis for bait in the piracatinga calophysus macropterus fishery in the western brazilian amazon contact. Seroprevalence of toxoplasma gondii in freeliving amazon. The bolivian river dolphin was briefly thought to be a subspecies as i. Here, we tested whether these wild toothed whales use different biosonar parameters and gaze changes. The annual cycle of flooding in this region amplitude 1115 m dominates all life. Insights on the use of dolphins boto, inia geoffrensis and tucuxi, sotalia fluviatilis for bait in the piracatinga calophysus macropterus fishery in the western brazilian amazon. For full access to this pdf, sign in to an existing account, or.
Amazon river dolphins inia geoffrensis modify biosonar. The action plan for south american river dolphins 20102020. Mammal species of the world a taxonomic and geographic reference. Pdf attitudes and behaviors toward amazon river dolphins. Because of its sympatry with tucuxi dolphins sotalia fluviatilis, a whistling species, some presume tucuxi whistles might have been erroneously assigned to the boto. Biology and conservation of freshwater cetaceans in asia. Both cetaceans in the brazilian amazon show sustained, profound. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the.
Boto, pink river dolphin the boto is a mammal included in the cetacea order, odontoceti suborder and iniidae family. We present results of the first simultaneous visual and acoustic surveys for amazon river dolphins inia geoffrensis and tucuxi sotalia fluviatilis, undertaken in. 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 r. Abundance estimate of the amazon river dolphin inia geoffrensis. Ecological factors influencing group sizes of river dolphins inia geoffrensis and sotalia fluviatilis. Because of its sympatry with tucuxi dolphins sotalia fluviatilis. The pink river dolphin is the largest cetacean to spend its time in fresh waters. Inia geoffrensis blainville, 1817 amazon river dolphin, boto, pink river dolphin, boutu. Reproductive parameters of the amazon river dolphin or. Reproductive parameters of the amazon river dolphin, or boto inia geoffrensis, were estimated from a population of individually recognizable animals in the brazilian amazon throughout 24 years. Evidence is presented for the recognition of a new species of streptococcus isolated from abscess foci in an amazon freshwater dolphin, inia geoffrensis. Calving takes place when water levels are low or declining and fish more concentrated and susceptible to predation 21. Abundance estimate of the amazon river dolphin inia geoffrensis and. Amazon river dolphins boto, inia geoffrensis blainville 1817 employ a lowpower, high sampling rate biosonar as a likely adaptation to the often shallow and cluttered waters in which they hunt ladegaard et al.
The genus inia is currently considered monospecific, with three recognized subspecies. Reproductive management of the orinoco river dolphin inia. The lower jaw fat of the amazon river dolphininia geoffrensis contains 52. A boat survey was conducted from 5 to 26 june 1993 to estimate the abundance of the amazon river dolphin inia geoffrensis and the tucuxi sotalia fluviatilis along ca. If you need images about inia geoffrensis for an article or a report, you can download stock photos at a very small price. Amazon river dolphins inia geoffrensis use a highfrequency short. The digestive tract of inia boliviensis dorbigny, 1834. Effect of illegal harvest on apparent survival of amazon. Unlimited viewing of the articlechapter pdf and any associated supplements and figures. The recent discovery of the araguaian river dolphin inia araguaiaensis highlights how little we know about the diversity and biology of river dolphins. The freshwater dolphin inia geoffrensis geoffrensis produces. A major threat to river dolphins in brazil is habitat loss and fragmentation as a result of the construction of hydroelectric dams.
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