Novel herpesviruses in riverine and marine cetaceans from. Population status of the bolivian river dolphin inia boliviensis d. Amazon river dolphins were until recently considered to be of one species by most authors, inia geoffrensis. It is a woodystemmed, twining tropical vine or sprawling shrub. Pdf mercury in populations of river dolphins of the amazon. The recent discovery of the araguaian river dolphin inia araguaiaensis highlights how little we know about the diversity and biology of river dolphins. The amazon dolphin or boto inia geoffrensis has a long, narrow beak. In the present study we tested if a series of 18 rapids on the upper madeira river form an effective barrier to gene flow, and in particular if they delimit the distribution of the boto inia. Inia humboldtiana this large fish reaching up to two metres in length is a staple of the local smallscale fishing industry. Locally known as bufeos, it is found in some rivers in the upper madeira basin of the bolivian amazon. The bolivian river dolphins are separated from the amazonian river dolphins by a series of rapids and falls.
Stomach content of a juvenile bolivian river dolphin inia. Population sizes of inia and sotalia were estimated for different habitats main river, tributary, lake, island, confluence, and channel. Pdf the bolivian river dolphin or bufeo inia boliviensis is one of four species of river dolphins in south america. Pdf stomach content of a juvenile bolivian river dolphin. Genetic diferentiation sic in populations of the river dolphins genus inia blainville, 1817 and apports to the taxonomic status with molecular analysis. First report of major histocompatibility complex class ii loci from the amazon pink river dolphin genus inia. The gray whale eschrichtius robustus, also known as the grey whale, gray back whale, pacific gray whale, or california gray whale, is a baleen whale that migrates between feeding and breeding grounds. Yaburol inia geoffrensis boliviensis tir tana apta ke geoffrensis katca vey inia oxi vey iniidae yasa ke cetacea veem odontoceti volveyveem.
As a shrub, it grows to 3 tall and spreads to 6 wide. First evaluation of abundance of the three river dolphin. Abstract the pink river dolphin genus inia, is widely distributed in the orinoco and amazon basins. Amazon river system as an ecological barrier driving genetic. Aliaga rossel e mcguire t l in press iniidae in wallace et al eds distribucion from ucp 441 at university of central punjab. Inia boliviensis dorbigny 1834 in tributaries of the itenez river bolivian amazon in. Pdf on may 8, 2008, ruizgarcia and others published molecular differentiation among inia geoffrensis and inia boliviensis iniidae, cetacea by means of nuclear intron sequences find, read. Inia is the only genus in the family iniidae odontoceti, cetacea, one of four families of river dolphins. Pdf molecular differentiation among inia geoffrensis and. It is unique for its migratory patterns, breeding in the andean foothills in the west of the amazon and traveling across the continent to mature in the amazon delta. Pdf conservation of the river dolphin inia boliviensis in bolivia. Fmib 34086 inia geoffroyi desmarest gray the inia young specimen.
The bolivian river dolphin was briefly thought to be a subspecies as i. Amazon river system as an ecological barrier driving. Organised by faunagua, but in collaboration with many organizations, a workshop was hold in which the first steps were taken to formulate an action plan for the conservation of the inia boliviensis in bolivia. We report the first major histocompatibility complex mhc dqb1 sequences for the two species of pink river dolphins inia geoffrensis and inia boliviensis inhabiting the amazon and orinoco river basins. Previous morphological and genetic studies have proposed the existence of at least two evolutionary significant units. In this study, we described the acoustic repertoire of this newly discovered species in concert with their behaviour. The digestive tract of inia boliviensis dorbigny, 1834. Inia geoffrensis boliviensis has populations in the upper reaches of the madeira. Crown group inia refers to the crown clade arising from the last common ancestor of all named species of inia, including inia boliviensis dorbigny, 1834 and inia araguaiaensis hrbek et al. Wpavkyaburol inia geoffrensis boliviensis wikimedia. The bolivian river dolphin inia boliviensis, a mammal, is a species related to the. No previous studies have focused on the genetic structure of this genus.
Population, density estimates, and conservation of river dolphins. Genetic diversity has been treated by the iucn as a priority parameter for measuring the risk of extinction of a species, since it represents the substratum on which natural selection acts to promote the adaptation of a species to. First report of major histocompatibility complex class ii. Inia boliviensis is an independent biological population figs. Analysis of distribution of river dolphins inia and sotalia in protected and transformed areas in the amazon and orinoco basins. Pdf mercury in populations of river dolphins of the. A 1998 classification listed a single species, inia geoffrensis, in the genus inia, with three recognized subspecies. Isthminia panamensis, a new fossil inioid mammalia.
Currently, the systematics of inia have been revised with molecular studies, which suggest that the genus of inia found in bolivia is a distinct species, inia boliviensis banguera et al. 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 boto is the largest of the river dolphins with a. This divergence estimate is broadly compatible with the uplift of the fitzcarrald arch which commenced to isolate the bolivian subbasin from the amazon. The action plan for south american river dolphins 20102020. Conservation of the river dolphin inia boliviensis in bolivia. For other inia species heterozygosities are even lower, gravena 20 reported h e 0. The bolivian river dolphin, or inia boliviensis, is one of four freshwater river dolphin species in south america. Inia boliviensis is the only cetacean in bolivia and despite its endemic status basic knowledge about it is still scarce.
Until the recent construction of hydroelectric dams, a series of 18 rapids divided the upper and lower madeira river, and these rapids were thought to separate two species of. Molecular identification of evolutionarily significant units. Although we follow the suggestions of the society for marine mammalogys committee on taxonomy 2014 in provisionally recognizing two sub. 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. Isthminia panamensis, a new fossil inioid mammalia, cetacea.
The article presents a study about the stomach content of a juvenile bolivian river dolphin inia geoffrensis boliviensis, an endemic subspecies of the amazon river dolphin, found in the upper madeira river basin in bolivia. We observed 778 inia geoffrensis, 1,323 inia boliviensis, and 764 sotalia fluviatilis. The amazon river dolphin is also known as the boto or pink dolphin. Mandevilla boliviensis is native to bolivia and ecuador.
The article presents a study about the stomach content of a juvenile bolivian river dolphin inia geoffrensis boliviensis, an endemic subspecies of the amazon river dolphin, found in the upper. The article presents a study about the stomach content of a juvenile bolivian river dolphin inia geoffrensis boliviensis, an endemic subspecies of the amazon river. A total of 291 line and 890 strip transects were conducted, covering a distance of 2,704 linear kilometers. The total population of the species is estimated to be of. The genus inia is currently considered monospecific, with three recognized subspecies. Locally called the bufeo inia boliviensis in bolivia, it is. Molecular identification of evolutionarily significant. Pdf abundance of the bolivian river dolphin inia boliviensis in. Distribution and conservation status of the bolivian river dolphin inia boliviensis dorbigny 1832.
Sep 01, 2015 crown group inia refers to the crown clade arising from the last common ancestor of all named species of inia, including inia boliviensis dorbigny, 1834 and inia araguaiaensis hrbek et al. Distribution and abundance of the river dolphin inia. Novel herpesviruses in riverine and marine cetaceans from south america. Feb 05, 2020 plural of inionzoology a south american freshwater dolphin inia boliviensis with a hairy snout. We sequenced mitochondrial genes of otter lontra longicaudis and pteronura brasiliensis and dolphin inia sp. Pdf the article presents a study about the stomach content of a. Em 1824, alcide dorbigny descreveu o inia boliviensis como uma especie distinta, e estabelecendo o termo generico inia. Thus, in the studied section of the madeira river we encountered i. Pdf conservation of the river dolphin inia boliviensis. Inia boliviensis can further be divided into two distinct management units mu based both on mitochondrial and nuclear markers moritz, 1994.
A total of 291 line and 890 strip transects were conducted, covering a. These sequences were found to be polymorphic within the inia genus and showed shared homology with cetacean dqb1 sequences, especially, those of the monodontidae and phocoenidae. Media in category inia boliviensis the following 5 files are in this category, out of 5 total. Aliaga rossel e mcguire t l in press iniidae in wallace et. Bolivian river dolphins were discovered by the western world in 1832 by french researcher alcide dorbigny.
Aliaga rossel e mcguire t l in press iniidae in wallace et al. Pdf analysis of distribution of river dolphins inia and. First evaluation of abundance of the three river dolphin species inia geoffrensis, i. The recognition of anew river dolphin species endemic to bolivia increases the importance and necessity of protecting this species. Another new species, inia araguaiaensis, was described by hrbek et al. Eschrichtius robustus society for marine mammalogy. Population, density estimates, and conservation of river dolphins inia and sotalia in the amazon and orinoco river basins. Pdf stomach content of a juvenile bolivian river dolphin inia. Mercury in populations of river dolphins of the amazon and orinoco basins. 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. The amazon river dolphin, genus inia, is endemic to the major river basins of northern south america.
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