Irrawaddy dolphin population genetic

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August undefined, 2024

WebOct 23, 2024 · The Cambodian Government’s Fisheries Administration and WWF announced today that the Irrawaddy dolphin population in the Mekong River numbers just 89. The number is a slight decline from the estimate of 92 in 2024 but shows that the population has stabilised in recent years after decades of precipitous decline. WebApr 2, 2024 · Genetics and Molecular Biology Abstract The Irrawaddy dolphin (Orcaella brevirostris) is an endangered, small cetacean species which is widely distributed in rivers, estuaries, and coastal waters throughout the tropical and subtropical Indo-Pacific.

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WebJan 3, 2024 · Historical size of the Irrawaddy dolphin (Orcaella brevirostris) population inhabiting the Mekong River is unknown and there is significant concern for long-term survival of the remaining population as a result of low abundance, slow reproduction rate, high neonatal mortality, and continuing anthropogenic threats. WebSince 2007, populations have appeared to stabilise; the most recent estimate in 2024 is 89 individuals (with 95% confidence interval: 78-102 individuals)7. The number of Irrawaddy dolphins in the Ayeyarwady river in Myanmar has been … how does the icd define psychopathology

Demographic collapse and low genetic diversity of the Irrawaddy …

WebDemographic collapse and low genetic diversity of the Irrawaddy dolphin population inhabiting the Mekong River Article Full-text available Jan 2024 Michael Krützen Isabel Beasley Corinne Y.... WebWe investigated population structure and reconstructed the demographic history based on 60 Irrawaddy dolphins samples collected between 2001 and 2009. The phylogenetic analysis indicated reciprocal monophyly of Mekong River Orcaella haplotypes with respect to haplotypes from other populations, suggesting long-standing isolation of the Mekong ... how does the ifit leaderboard work

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Irrawaddy dolphin - IWC

WebHistorical size of the Irrawaddy dolphin (Orcaella brevirostris) population inhabiting the Mekong River is unknown and there is significant concern for long-term survival of the remaining population as a result of low abundance, slow reproduction rate, high neonatal mortality, and continuing anthropogenic threats. WebApr 2, 2024 · The Irrawaddy dolphin (Orcaella brevirostris) is an endangered, small cetacean species which is widely distributed in rivers, estuaries, and coastal waters throughout the tropical and subtropical Indo-Pacific. Despite the extensive distribution of this species, little is known of individual movement … photocard poolingThe Irrawaddy dolphin (Orcaella brevirostris) is a euryhaline species of oceanic dolphin found in scattered subpopulations near sea coasts and in estuaries and rivers in parts of the Bay of Bengal and Southeast Asia. It closely resembles the Australian snubfin dolphin (of the same genus, Orcaella), which was not … See more One of the earliest recorded descriptions of the Irrawaddy dolphin was by Sir Richard Owen in 1866 based on a specimen found in 1852, in the harbour of Visakhapatnam on the east coast of India. It is one of two species in its genus. … See more The Irrawaddy dolphin's colour is grey to dark slate blue, paler underneath, without a distinctive pattern. The dorsal fin is small and rounded behind the middle of the back. The forehead … See more Communication is carried out with clicks, creaks, and buzzes at a dominant frequency of about 60 kilohertz, which is thought to be used for See more Irrawaddy dolphins have a mutualistic relationship of co-operative fishing with traditional fishers. Fishers in India recall when they would call out to the dolphins, by tapping a wooden … See more The species name brevirostris is from the Latin meaning short-beaked. It is very closely related to the Australian snubfin dolphin (Orcaella heinsohni). The two snubfin dolphins … See more Although sometimes called the Irrawaddy river dolphin, it is not a true river dolphin, but an oceanic dolphin that lives in brackish water near coasts, river mouths, and estuaries. It has established subpopulations in freshwater rivers, including the See more Irrawaddy dolphins are more susceptible to human conflict than most other dolphins that live farther out in the ocean. Drowning in See more how does the hyundai kona rate

"WebJan 3, 2024 · The Irrawaddy dolphin population occupying the Mekong River is small, declining, isolated, and potentially suffering from inbreeding and loss of genetic diversity. It is apparent that this population is in serious threat of extirpation in the near future. " - Irrawaddy dolphin population genetic

Irrawaddy dolphin population genetic

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WebObjectives: To apply population genetics and mitogenome phylogenetic analyses to assess genetic diversity and connectivity among Irrawaddy dolphin populations in Indonesia and Thailand. Materials & Methods: Samples from stranded dolphins were collected from Mahakam River and East Kalimantan, Indonesia and from Songkhla Lake and the Lower … WebThe Mekong dolphin population is now restricted to the upper 190km (190km = 118.06 miles) of the Cambodian Mekong River, from Kratie north to the Laos/Cambodian border. Photo-identification studies have shown that the total population was an estimated 127 individuals in 2005, as may now be as few as 86 individuals.

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WebApr 13, 2024 · Sporting a bulging forehead, a round face and a flexible neck (rare among dolphins), the Irrawaddy dolphin gets its name from the Irrawaddy River in Myanmar. But despite its name, it is not solely a river dolphin. This endangered oceanic dolphin is euryhaline, a rare type of marine life that has adapted to survive in fresh and saltwater ... WebThe Irrawaddy dolphin is a euryhaline species of oceanic dolphin found in discontinuous subpopulations near sea coasts and in estuaries and rivers in parts of the Bay of Bengal and Southeast Asia. This species closely resembles the Australian snubfin dolphin and was not presented as a separate species until 2005.

WebJul 12, 2024 · 0:00. 36:45. After a somewhat rough start, the wolves who survived being transplanted to Isle Royale in Lake Superior seem to have taken a liking to their new surroundings, producing multiple ... WebApr 9, 2024 · Irrawaddy and pink humpbacked dolphins An Irrawaddy dolphin, also known as the Mekong dolphin, swims in the river at Kampi village in Kratie province, 230 km (143 miles) northeast of Cambodia, on ...

WebIn this paper, we aim to elucidate the conservation status of the Irrawaddy dolphin population inhabiting the Mekong River by: (a) investigating Irrawaddy dolphin genetic samples from Cambodia in a phylogenetic context; (b) analysing the potential presence and extent of population structure among Irrawaddy dolphins in the Mekong River; and (c) … WebTraductions en contexte de "population and ecosystem" en anglais-français avec Reverso Context : Determine genetic, population and ecosystem effects of selective harvesting

WebMay 19, 2024 · The remaining Mekong River population—about 90 individuals—spans only 180 km in Cambodia . Irrawaddy dolphins in the Mekong, along with those in Indonesia’s Mahakam River and Myanmar’s Ayeyarwady River, are threatened by anthropogenic activities that put the species at risk of imminent regional extinction ( 1 , 4 ).

WebIrrawaddy dolphins are usually seen in groups of 2 to 5 individuals, although they are sometimes spotted in groups as large as 15. 6 10. Staying in groups keep them safe Irrawaddy dolphins are vulnerable to threats from sharks. By staying in groups, they become more difficult to hunt and have better chances of survival. 11. photocard paper typeWebApr 8, 2024 · About 1,400 proboscis monkeys live in the mangroves of Balikpapan Bay, or 5% of the total population in Borneo, according to a coalition of local civil society groups. how does the imf help globalisationWebThe Mekong River Irrawaddy dolphins inhabit a 118-mile stretch of the river between Cambodia and Lao PDR and are scarce—just 92 individuals are estimated to still exist. These dolphins have a bulging forehead, short beak, and 12-19 teeth on each side of both jaws. how does the icesat-2 satellite workWebSep 29, 2024 · Irrawaddy dolphins were sighted on 136 occasions. Through DISTANCE analysis, a decrease in population density in the inner Bay area was observed from 0.45 dolphins/km 2 in 2000–2001 (CV = 24%) to 0.34 and 0.32 dolphins/km 2 in 2008 and 2015 (CV = 31% and 25%). how does the icd 10 codes workWebA study of Irrawaddy dolphins in the Mekong found that 85% of 60 sampled dolphins all shared the same maternally inherited haplotype, an indication of severe inbreeding depression, with the current population size only being 5% of its original/ancestral size 19. how does the iep team determine lreWebSoutheast-Asian Irrawaddy dolphins (Orcaella brevirostris) are highly susceptible to anthropogenic effects that reduce effective population size and genetic diversity. Coastal populations are currently listed as “Vulnerable” on IUCN’s Red List, while some riverine populations are listed as “Critically Endangered”. photocard oyster 16+WebThe Irrawaddy dolphin population inhabiting the Mahakam is estimated to have become isolated from other populations for ~ 500,000 years and the population has two unique genetic haplotypes compared to samples from other freshwater populations or in Indonesia from coastal populations (Budi, 2024). how does the if formula work in excel