| polychlorinated dibenzo-p-dioxins, dibenzofurans, and polychlorinated biphenyls in human tissues, meat, fish, and wildlife samples from india. | concentrations of polychlorinated dibenzo-p-dioxins (pcdds), dibenzofurans (pcdfs), and non- and mono-ortho-substituted polychlorinated biphenyls (dioxin-like pcbs) were measured in tissues of humans, fishes, chicken, lamb, goat, predatory birds, and ganges river dolphins collected from various locations in india. pcdds/dfs were found in most of the samples analyzed with the liver of spotted owlet containing the highest concentration of 3,300 pg/g, fat wt. 2,3,7,8-substituted pcdds and pcdfs wer ... | 2001 | 11563645 |
| a survey of perfluorinated compounds in surface water and biota including dolphins from the ganges river and in other waterbodies in india. | despite the reports of the occurrence of perfluorochemicals (pfcs) in industrialized nations, information on pfcs in less industrialized countries is meager. in the present study, concentrations and profiles of pfcs were investigated in surface waters (rivers, lakes, coastal seas and untreated sewage; n=42) including the ganges river water, and biota such as shrimp (n=2), fish (n=28), and ganges river dolphin (platanista gangetica; n=15). pfos was the dominant pfc found in most of the samples an ... | 2009 | 19328521 |
| coexistence of fisheries with river dolphin conservation. | freshwater biodiversity conservation is generally perceived to conflict with human use and extraction (e.g., fisheries). overexploited fisheries upset the balance between local economic needs and endangered species' conservation. we investigated resource competition between fisheries and ganges river dolphins (platanista gangetica gangetica) in a human-dominated river system in india to assess the potential for their coexistence. we surveyed a 65-km stretch of the lower ganga river to assess hab ... | 2010 | 20337677 |
| arktocara yakataga, a new fossil odontocete (mammalia, cetacea) from the oligocene of alaska and the antiquity of platanistoidea. | the diversification of crown cetacean lineages (i.e., crown odontoceti and crown mysticeti) occurred throughout the oligocene, but it remains an ongoing challenge to resolve the phylogenetic pattern of their origins, especially with respect to stem lineages. one extant monotypic lineage, platanista gangetica (the ganges and indus river dolphin), is the sole surviving member of the broader group platanistoidea, with many fossil relatives that range from oligocene to miocene in age. curiously, the ... | 2016 | 27602287 |
| hematological, plasmatic and urinary values of three species of cetaceans belonging to the family platanistidae (inia geoffrensis (de blainville, 1817); platanista indi (blyth, 1859); and platanista gangetica (roxburgh, 1801)). | | 1972 | 5056457 |
| blind river dolphin: first side-swimming cetacean. | the blind river dolphin (platanista gangetica), first written about by pliny the elder in a.d. 72, was found (10 november 1968) to be the first known side-swimming cetacean. the rudimentary eye lacks the lens, but anatomical evidence suggests that the eye may serve as a light sensor. the underwater sound emissions of this species, although similar to those of the amazon river dolphin (inia geoffrensis), appear to be produced constantly. | 1969 | 5350341 |
| retroposon analysis of major cetacean lineages: the monophyly of toothed whales and the paraphyly of river dolphins. | sine (short interspersed element) insertion analysis elucidates contentious aspects in the phylogeny of toothed whales and dolphins (odontoceti), especially river dolphins. here, we characterize 25 informative sines inserted into unique genomic loci during evolution of odontocetes to construct a cladogram, and determine a total of 2.8 kb per taxon of the flanking sequences of these sine loci to estimate divergence times among lineages. we demonstrate that: (i) odontocetes are monophyletic; (ii) ... | 2001 | 11416211 |
| a multimodal detection model of dolphins to estimate abundance validated by field experiments. | abundance estimation of marine mammals requires matching of detection of an animal or a group of animal by two independent means. a multimodal detection model using visual and acoustic cues (surfacing and phonation) that enables abundance estimation of dolphins is proposed. the method does not require a specific time window to match the cues of both means for applying mark-recapture method. the proposed model was evaluated using data obtained in field observations of ganges river dolphins and ir ... | 2013 | 23968039 |
| clicking in shallow rivers: short-range echolocation of irrawaddy and ganges river dolphins in a shallow, acoustically complex habitat. | toothed whales (cetacea, odontoceti) use biosonar to navigate their environment and to find and catch prey. all studied toothed whale species have evolved highly directional, high-amplitude ultrasonic clicks suited for long-range echolocation of prey in open water. little is known about the biosonar signals of toothed whale species inhabiting freshwater habitats such as endangered river dolphins. to address the evolutionary pressures shaping the echolocation signal parameters of non-marine tooth ... | 2013 | 23573197 |
| a new fossil dolphin dilophodelphis fordycei provides insight into the evolution of supraorbital crests in platanistoidea (mammalia, cetacea). | many odontocete groups have developed enlarged facial crests, although these crests differ in topography, composition and function. the most elaborate crests occur in the south asian river dolphin (platanista gangetica), in which they rise dorsally as delicate, pneumatized wings anterior of the facial bones. their position wrapping around the melon suggests their involvement in sound propagation for echolocation. to better understand the origin of crests in this lineage, we examined facial crest ... | 2017 | 28573006 |
| the neocortex of indian river dolphins (genus platanista): comparative, qualitative and quantitative analysis. | we investigated the morphology of four primary neocortical projection areas (somatomotor, somatosensory, auditory, visual) qualitatively and quantitatively in the indian river dolphins (platanista gangetica gangetica, p. gangetica minor) with histological and stereological methods. for comparison, we included brains of other toothed whale species. design-based stereology was applied to the primary neocortical areas (m1, s1, a1, v1) of the indian river dolphins and compared to those of the bottle ... | 2016 | 27732977 |
| water quality assessment of river beas, india, using multivariate and remote sensing techniques. | river beas originates in the himalayas and merges into river sutlej at harike, a ramsar wetland. this river is a habitat of the endangered freshwater dolphin, platanista gangetica minor r. twenty-five water quality parameters, including eight heavy metals, were studied at four sampling sites over a stretch of 63 km between beas and harike towns for pre-monsoon, post-monsoon and winter seasons. principal component analysis of the data proved to be an effective tool for data reduction as the first ... | 2016 | 26842241 |
| characterization of the artisanal fishing communities in nepal and potential implications for the conservation and management of ganges river dolphin (platanista gangetica gangetica). | the ganges river dolphin (platanista gangetica gangetica) (grd) is classified as one of the most endangered of all cetaceans in the world and the second scarcest freshwater cetacean. the population is estimated to be less than 2,000 individuals. in nepal's narayani, sapta koshi, and karnali river systems, survival of grd continues to be threatened by various anthropogenic activities, such as dam construction and interactions with artisanal fisheries. a basic description of the geographic scope, ... | 2016 | 26788434 |
| fossil dolphin otekaikea marplesi (latest oligocene, new zealand) expands the morphological and taxonomic diversity of oligocene cetaceans. | the oligocene epoch was a time of major radiation of the odontoceti (echolocating toothed whales, dolphins). fossils reveal many odontocete lineages and considerable structural diversity, but whether the clades include some crown taxa or only archaic groups is contentious. the new zealand fossil dolphin "prosqualodon" marplesi (latest oligocene, ≥23.9 ma) is here identified as a crown odontocete that represents a new genus, otekaikea, and adds to the generic diversity of oligocene odontocetes. o ... | 2014 | 25250733 |
| habitat fragmentation and species extirpation in freshwater ecosystems; causes of range decline of the indus river dolphin (platanista gangetica minor). | habitat fragmentation of freshwater ecosystems is increasing rapidly, however the understanding of extinction debt and species decline in riverine habitat fragments lags behind that in other ecosystems. the mighty rivers that drain the himalaya - the ganges, brahmaputra, indus, mekong and yangtze - are amongst the world's most biodiverse freshwater ecosystems. many hundreds of dams have been constructed, are under construction, or are planned on these rivers and large hydrological changes and lo ... | 2014 | 25029270 |
| ganges river dolphin: an overview of biology, ecology, and conservation status in india. | ganges river dolphin, platanista gangetica gangetica, is one of the three obligatory freshwater dolphins in the world and is distributed in the ganges-brahmaputra-meghna and sangu-karnaphuli river systems in india, nepal, and bangladesh. this species is facing considerable threats to its survival, and its population has dwindled from 4000 to 5000 in the early 1980s to 3500 in 2014 in the distribution range. this article reviews current status of the sub-species, habitat use, and the potential th ... | 2014 | 24924188 |
| to see or not to see: investigating detectability of ganges river dolphins using a combined visual-acoustic survey. | detection of animals during visual surveys is rarely perfect or constant, and failure to account for imperfect detectability affects the accuracy of abundance estimates. freshwater cetaceans are among the most threatened group of mammals, and visual surveys are a commonly employed method for estimating population size despite concerns over imperfect and unquantified detectability. we used a combined visual-acoustic survey to estimate detectability of ganges river dolphins (platanista gangetica g ... | 2014 | 24805782 |
| a critical analysis of the environment impact assessment report of the 2000 mw lower subansiri hydroelectric project with special reference to the down stream ecology and people's livelihood. | the environment impact assessment (eia) report of the 2000 mw lower subansiri hydroelectric project prepared by the wapcos (water and power consultancy service, 2003) indicates that downstream survey was done only up to 7 km from the dam site without giving much importance to the actual scenario and avoiding some most crucial ecological aspects. in the report, insufficient records of terrestrial flora, phytoplanktons and fish diversity are given. no records of aquatic macrophytes, riparian flora ... | 2011 | 23505832 |
| phylogenetic position of platanista gangetica: insights from the mitochondrial cytochrome b and nuclear interphotoreceptor retinoid-binding protein gene sequences. | the evolutionary relationship of peculiar and poorly known ganges river dolphin with extinct and extant cetaceans has been in the state of confusion for more than a century. the close resemblance of platanistidae with some of the extinct taxon viz., dalpiaziniidae and waipatiidae and their sister group relationship with many of the extant lineages of cetaceans has been reported but none of the alternative hypotheses provide an unambiguous placement for this species. the present study provides in ... | 2004 | 15336663 |
| temporal trends of persistent organochlorine contamination in russia: a case study of baikal and caspian seal. | to examine temporal trends of organochlorine (oc) contamination in lake baikal and the caspian sea, concentrations of persistent ocs, such as ddt and its metabolites (ddts), polychlorinated biphenyls (pcbs), hexachlorocyclohexane (hchs), chlordane compounds (chls), tris(4-chlorophenyl)methane (tcpme), and tris(4-chlorophenyl)methanol (tcpmoh), in the blubber of female seals were determined. collections were made in 1992, 1993, 1995 and 1998. ddt concentrations in baikal and caspian seals showed ... | 2003 | 12712284 |
| concentration of organochlorines in ganges river dolphins from patna, bihar. | concentrations of ddt, hch, aldrin and endosulfan were determined in river dolphins from the river ganges, patna. among the organochlorines studied in the dolphins, ddt concentration was highest followed by hch. this shows exposure of dolphins to these organochlorine pesticides. presences of organochlorines to higher degree in tissues suggest that the river dolphins be at greater risk due to pesticidal contamination of the river system. | 2002 | 12597572 |
| mri examination of trachea and bronchi in the ganges river dolphin (platanista gangetica). | the mri examination was carried out in a formalin-fixed specimen of the ganges river dolphin (platanista gangetica), one of the evolutionary primitive species of cetaceans. we could morphologically elucidate the tracheobronchial ramification in the intact whole body. we demonstrated from the mri sections that the characteristic tracheal bronchus branches from the trachea at the cranial portion. these findings suggest the phylogenetic relationships between cetaceans and artiodactyls. the left bro ... | 1999 | 10563292 |
| profile: river dolphins in bangladesh: conservation and the effects of water development | / ganges river dolphins (platanista gangetica) are threatened in bangladesh from the effects of dams, large embankment schemes, dredging, fisheries bycatch, directed hunting, and water pollution. visual surveys of the section of the jamuna river located between the divergence of the old brahmaputra river and the confluence of the padma river and the section of the kushiyara river located between the bangladesh-india border and the confluence of the korangi river recorded a sighting rate of 0.13 ... | 1998 | 9516526 |
| morphology of the tracheobronchial tree of the ganges river dolphin (platanista gangetica). | to contribute to the phylogenetic evaluation of the river dolphin, the morphology of the tracheobronchial tree of the ganges river dolphin was analyzed according to nakakuki's fundamental bronchial tree model of mammals. in the right lung, the bronchial tree consists of the tracheal bronchus, five lateral series bronchi, three dorsal series bronchi and one ventral series bronchus. in the left lung, it consists of five lateral series bronchi, four dorsal series bronchi and one ventral series bron ... | 1990 | 2290635 |
| hepatic trematodiasis in a ganges river dolphin. | hepatic trematodiasis caused by cyclorchis campula was diagnosed in a juvenile ganges river dolphin that had been in captivity at an aquarium for approximately 1 year. histopathologic findings were severe chronic suppurative cholangitis, hyperplasia of the bile duct epithelium, and periductal fibrosis associated with fluke infection of the large bile ducts. | 1979 | 521375 |
| liver and bile-passage of ganges dolphin, platanista gangetica. | | 1972 | 4678922 |
| digestive tract of ganges dolphin, platanista gangetica. ii. small and large intestines. | | 1972 | 5067572 |
| digestive tract of ganges dolphin, platanista gangetica. i. oesophagus and stomach. | | 1971 | 5171962 |
| platanista gangetica, a dolphin that swims on its side. | | 1970 | 5534621 |