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Topic: River dolphin


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  Reference.com/Encyclopedia/River dolphin
River dolphins are four living species of dolphin which reside in freshwater rivers and estuaries.
However, it is scientifically classed in the river dolphin family rather than the oceanic dolphin family.
Chinese River Dolphin (or Baiji) Lipotes vexillifer (Presumed extinct as of 2006)
www.reference.com /browse/wiki/Platanistoidae   (443 words)

  
 CMS: Platanista gangetica, Ganges river dolphin, susu
(1997) estimated the population of Ganges River dolphin in the river Brahmaputra from South Salmara to Sadiya to be 400.
River dolphins may be particularly vulnerable to industrial pollution because their habitat in counter-current pools downstream of confluences and sharp meanders often places them in close proximity to point sources in major urban areas (e.g.
- Mohan RSL, Dey SC, Bairagi SP (1998) On a resident population of the Ganges River dolphin Platanista gangetica in the Kulsi River (Assam) a tributary of Brahmaputra.
www.cms.int /reports/small_cetaceans/data/P_gangetica/p_gangetica.htm   (4330 words)

  
 River Dolphin
Indus River Dolphins are grey-brown in colour, sometimes with a pinkish belly, and measure between 1.5 and 2.5m in length, weighing a maximum of 90kg.
The Indus River dolphin was apparently formerly common and distributed throughout the Indus River system in Pakistan, from the Himalayan foothills to the mouth of the Indus, and in the main tributaries - Jhelum, Chenab, Ravi and Sutlej - from the hills to their junction with the Indus.
As a result, by the 1970's the abundance and distribution of the Indus River dolphin had significantly declined, and most of the remaining population was concentrated between two of the barrages, the Sukkur and Guddu barrages in Sind Province.
www.wildlifeofpakistan.com /RiverDolphin.html   (699 words)

  
 Pink Amazonian River Dolphin
Of the five freshwater species of dolphins in the world, the pink Amazon River dolphin, Inia geoffrensis, or "bufeo colorado” as they are known in Peru and “botos" as they known in in Brazil, are considered to be the most intelligent.
What was considered to be one of the least threatened species of dolphins 20 years ago, has now become one of the most endangered species due to the accelerated and commercialized rape of the Amazon basin and the destruction of the South American tropical rainforest.
ISPTR believes that her work with the Peruvian Forest Police to protection both species of river dolphins, and empowering the local peoples of their rights and use of the law, there has been less illegal commercial fishing and logging in the area, thus saving the natural habitat of the land and aquatic life.
www.isptr-pard.org /dolphin.html   (1129 words)

  
 Ganges and Indus River Dolphin Summary
The dolphin is fully protected in Pakistan; in 1974 the Indus River Dolphin Reserve was established on the Indus River from the Sukkur Barrage to the Guddu Barrage in Sind Province in Pakistan.
The Ganges River Dolphin is primarily found in River Ganges and its tributaries in India while the Indus River Dolphin is found in the Indus river in Pakistan.
The Indus subspecies resides primarily in the Indus River in Pakistan.
www.bookrags.com /Ganges_and_Indus_River_Dolphin   (1116 words)

  
 Boto (Amazon River Dolphin) | Cetacean Fact Sheet | American Cetacean Society
The Amazon River Dolphin, also called the boutu, boto, or bufeo, is the largest of the freshwater dolphins, and like all freshwater dolphins it is endangered because of hunting, human pressures, and degradation of habitat.
The Amazon River dolphin, or boutu, is a fresh water dolphin of medium size, with a heavy, thickset body.
The neck vertebrae are not fused together and this dolphin is able to bend its neck to an angle of 90 degrees to its body, downward or sideways.
www.acsonline.org /factpack/Boto.htm   (842 words)

  
 Research & Resources: Amazon River Dolphin (Inia geoffrensis)
This color variation is due to the clarity of the water in which the dolphin lives; the darker the water, the pinker the dolphin will be.
For one, Amazon River dolphins are able to turn their necks from side to side while most species of dolphin cannot.
Additional characteristics that set these dolphins apart from other species are molar-like teeth that allow them to chew their prey and bristle-like hairs at the ends of their snouts that help them search for food on the muddy river bottoms.
www.rainforest-alliance.org /resources.cfm?id=river_dolphin   (384 words)

  
 river_dolphins
The large rivers they inhabit have been degraded and fragmented, and river dolphin populations have plummeted as a result of pollution, dams and irrigation projects, overfishing, accidental takings from fisher's nets and hooks, and noise pollution caused by boat traffic (Randall et al, 1994).
River dolphins are sometimes regarded as "living fossils" and are believed to be the descendents of marine dolphins that moved inland to live in rivers and lakes.
The Indus river dolphin or bhulan lives in the Indus River Basin, Pakistan, and until the 1970s was believed to be the same species as the susu or Ganges river dolphin.
www.geocities.com /darthdusan/river_dolphins.htm   (4970 words)

  
 River Dolphins of No Return - National Zoo| FONZ
River dolphins also have small eyes, and those that live in the Indus and Ganges Rivers are essentially blind because their eyes lack lenses.
The main threats to river dolphins include: dams, which fragment their habitats and deplete the water; fishing, which often accidentally kills dolphins too; boats, which collide with and kill dolphins and make noise that can interfere with their sonar; and pollution, which degrades the water the dolphins live in.
Dolphin populations trapped upstream of barrages typically die out, and today only a few of the remaining populations are big enough to have a chance of surviving, with the largest estimated at 600 and the smallest at only 70.
nationalzoo.si.edu /Publications/ZooGoer/2003/5/RiverDolphins.cfm   (2815 words)

  
 Indus River Dolphin - Dolphins And Whales Window
Indus River Dolphins are grey-brown in colour, sometimes with a pinkish belly,and measure between 1.5 and 2.5m in length,weighing a maximum of 90kg.
There are estimated to be fewer than 1000 of these dolphins remaining in the whole of Pakistan, most of them between the Sukkur and Guddu barrages in the south of the country which is now designated a dolphin reserve.The impassable barrages are among the many reasons for the decline in numbers in recent decades.
The Ganges dolphin, a relative of the Indus River dolphin, is another distinct species subspecies of river dolphins as in the Amazon River dolphin and the Yangze River dolphin.
dolphins.jump-gate.com /differnt_dolphins/indus_river_dolphin.shtml   (1171 words)

  
 River Dolphins
The river dolphins have not been able to be thoroughly studied by anyone, as of yet.
The theory is the river dolphins give birth at the beginning of the dry season since the water level drops making the fish easier to locate.
Several of the authors are working to conserve the river dolphins and concentrated their entire publications to the dangers concerning the Amazon River dolphins.
lilt.ilstu.edu /psanders/litsearch/riverdolphins.htm   (1738 words)

  
 Ganges River Dolphin - Dolphins And Whales Window
The Ganges River Dolphin (Platanista gangetica gangetica) and Indus River Dolphin (Platanista gangetica minor) are two sub-species of freshwater or river dolphins found in the Indian sub-continent.
The single species is likely to have either the Ganges and Indus River Dolphin or Indian River Dolphin as its common name, although neither has yet spread into wide usage and the latter does not reflect that the Indus subspecies is resident primarily in Pakistan.
Dolphins are usually encountered on their own but have travelled in groups more often historically, when populations were larger.
dolphins.jump-gate.com /differnt_dolphins/ganges_river_dolphin.shtml   (762 words)

  
 Indus River Dolphin
The Indus River dolphin (Platanista minor) is one of the world's rarest mammals and the second most endangered freshwater river dolphin.
WWF - Pakistan, as part of its Indus Dolphin Conservation Initiatives, is improving agricultural practices near the dolphin habitat to reduce the agrochemical pollution in the Indus River.
The Indus River dolphin migrates upstream into the smaller tributaries during the monsoon rains and migrates downstream to the main channels in the dry season.
www.wwfpak.org /sc_indusriverdolphin.php   (599 words)

  
 River dolphin Summary
Although the exact population of Amazon river dolphins has not been estimated, they are believed to have to the largest population of all species of river dolphin.
In 1996, the IUCN considered Amazon river dolphins to be vulnerable to population decreases because of increased dam building along the Amazon River.
River dolphins are some of the most endangered of all the world's cetaceans.
www.bookrags.com /River_dolphin   (1526 words)

  
 WWF | Whales and Dolphins | Conservation Results | Ganges River Dolphins
Today, the Ganges River dolphin (Platanista gangetica) is protected once again under the Indian Wildlife Protection Act (and internationally under the CITES and the Convention on Migratory Species).
In one stretch of the Ganges, however, river dolphins are thriving, their number nearly doubling from 22 to 42 over the past decade.
As the voyage of dolphin discovery makes its final port of call, the twinkling lights of Narora is framed against a dam that dissects the Ganges from one bank to the other to divert water for irrigation and a power plant.
www.worldwildlife.org /cetaceans/results/ganges.cfm   (1367 words)

  
 Amazon River Dolphin   (Site not responding. Last check: )
Born with dark gray pigmentation, the dolphins become more translucent with age so that blood circulating beneath their skin gives them a vivid pink appearance, especially on the ventral side.
The mouth of Amazon river dolphins is fairly straight with a slight upturn at the corners.
Living throughout the Amazon and Orinoco River basins in Brazil, Peru, Bolivia, and Venezuela, botos were historically safe from capture in much of their range because of superstitions of the native people.
www.tmmsn.org /mmgulf/inia_geoffrensis.html   (506 words)

  
 Gangetic Dolphin Conservation - care4nature.org - an ecological footprint ...
With the pollution of rivers and water bodies growing at an unprecedented scale in India, the survival of hundreds of river-based species of plants and animals is gravely endangered today.
One such species under serious threat is the Indian river dolphin, often referred to as the Gangetic dolphin, as it is found mainly in the Ganga and its tributaries.
Because of this, river dolphins are still being killed in the Sanctuary, both deliberately and as a result of entanglement in fishing nets.
www.care4nature.org /wildindia/dolphin/conservation.htm   (450 words)

  
 Mekong Dolphin Conservation Project
In March 2002, an Irrawaddy dolphin carcass was found in Tien River (a branch of the Mekong River) in An Giang Province, Vietnam (near the Cambodian border).
Dolphin’s were commonly sighted throughout the Mekong River and associated tributaries in the early 1900’s.
The dolphins distribution in the dry season is thought to be restricted to the upper reaches of the Cambodian Mekong River from Kratie to Khone Falls (5 km north from the Lao/Cambodian border).
www.mekongdolphin.org /irrawaddy_dolphin.htm   (1383 words)

  
 China's Yangtze River Dolphin Declared Extinct
The Yangtze river dolphin, or baiji, is functionally extinct, scientists from six nations said Wednesday after failing to find a single one of the rare animals after searching the river for six weeks.
The 20 million year old river dolphin was one of the world's oldest species.
Since the UN Environment Programme has declared 2007 to be the Year of the Dolphin, Pfluger believes the disappearance of the baiji must be seen as warning signal for the future.
www.ens-newswire.com /ens/dec2006/2006-12-14-02.asp   (643 words)

  
 Dolphins -- Kids' Planet -- Defenders of Wildlife   (Site not responding. Last check: )
Dolphins often hunt together, surrounding a school of fish, trapping the fish, and taking turns swimming through the school and catching fish.
Dolphins will also follow seabirds, other whales and fishing boats to feed opportunistically on the fish they scare up or discard.
Dolphins are well known for their agility and playful behavior, making them a favorite of wildlife watchers.
www.kidsplanet.org /factsheets/dolphins.html   (332 words)

  
 Animal Info - Ganges River Dolphin
The Indus and Ganges River dolphin populations, previously treated as separate species, have recently been reduced to subspecies of a single species.
Deliberate killing of Ganges River dolphins for meat and oil is believed to have declined in most areas, but it still occurs in some locations.
Brackish waters are a major component of the total range, but the Ganges River dolphin is not generally known to occur in salinities greater than 10 ppt, although it has been recorded in waters as saline as 23 ppt.
www.animalinfo.org /species/cetacean/platgang.htm   (1848 words)

  
 River Dolphin Behavior
Because general information on the number of dolphins and where they are in portions of the reserve has been determined, this study will focus on the behavior and movements of individual dolphins.
One of the goals of this study is to improve the methods for *photo-identifying individual river dolphins so that they may also be followed over the years.
Amazon river dolphins feed on a large variety of fish, are generally thought to be more solitary than oceanic dolphins, and they use ecolocation to communicate with one another.
www.virtualexplorers.org /ARD/Dolphin/quest2.htm   (225 words)

  
 Ganges River Dolphin
The Ganges River Dolphin has a long beak which thickens toward the tip, revealing the large teeth; the mouthline curves upward.
The Ganges River Dolphin are found in the the Ganges, Brahmaputra and Meghna rivers of India, Bangladesh, Nepal and Bhutan.
Other sources of threat include fishing nets, in which the river dolphin often becomes tangled when it migrates to tidal waters in the monsoon, and dams, which prevent the river dolphin from making its local migrations.
www.endangeredandrareanimals.com /ganges_river_dolphins.htm   (224 words)

  
 The Indus Dolphin > About Indus Dolphins > Indus River Dolphin : Factsheet
However, there are four specially adapted dolphin species which have evolved to live only in freshwater river systems and which would ultimately die in salt water.
For Indus dolphins being almost completely blind is not a disadvantage but an adaptation to living in a turbid river environment where eyes are virtually useless.
Dolphins are pregnant for approximately 10 months and the babies are thought to be born in spring.
indusdolphin.org.pk /about/factsheet.asp   (815 words)

  
 River Dolphin Closer to Extinction Despite Reports, Experts Say   (Site not responding. Last check: )
Asia's critically endangered Irrawaddy river dolphin may be in greater danger of extinction than ever, scientists say—and not less, as the government of Cambodia recently announced.
Two to three meters (seven to ten feet) long, the Irrawaddy river dolphin is similar in appearance to the better known beluga whale.
Also known as the Mekong River dolphin, the Irrawaddy is found near coasts and in estuaries in parts of southeast Asia and Australia.
news.nationalgeographic.com /news/2007/03/070321-river-dolphin.html   (480 words)

  
 Population of Endangered Dolphins Rises, Pakistani River Dolphin Population Increases, but Still Borders on Extinction ...
The blind, dorsal fin-less Indus River Dolphin, which occurs only in Pakistan, increased in number from 1,100 in 2001 to the current number of around 1,330, according to results of a March-April 2006 survey released in the capital, Islamabad, on Wednesday.
Some 1,200 of the long, narrow-snouted dolphins, including 150 calves, live in a 125 mile stretch of the river between water barges in the central Pakistani towns of Guddu and Sukkur, almost double the 725 spotted in the same area during the 2001 survey.
The remaining dolphins live within four other barged, shallower sections of the Indus River, some 620 miles of which was surveyed by scientists plying the waters in river boats.
www.cbsnews.com /stories/2006/06/07/ap/tech/mainD8I3F3880.shtml   (508 words)

  
 Dolphin Fishing Part 1
River dolphins are not the same dolphins that you would see in the ocean.
River dolphins are also the most endangered of all the world's cetaceans.
The five species of river dolphins are the Amazon River dolphin, the Franciscana dolphin, the Indus River dolphin, the Ganges River dolphin, and the Yangtze River dolphin.
www.human-dolphin.org /Dolphin_Fishing.html   (272 words)

  
 Ganges River Dolphin - Terai Arc - WWF - Expeditions in Conservation
Because Ganges river dolphins often live in murky waters, it is difficult to observe them in the wild, with most behavioral research being performed on captive animals.
One of the dolphin's most intriguing characteristics is its use of echolocation for orientation and hunting.
The Ganges river dolphin faces several dangers, the greatest being habitat alterations caused by the proliferation of dams, which cuts off upstream migration of the dolphin and its prey.
www.worldwildlife.org /expeditions/teraiarc/wl_dolphins.html   (360 words)

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