In the 1970s, many Irrawaddy dolphins were slaughtered for oil, and soon after, intensive fishing practices with explosives and gillnets began. In India, Irawaddy dolphins are mostly found in Chilika Lake of Odisha. [28] In the Mahakam River in Borneo, 73% of dolphin deaths are related to entanglement in gillnets, due to heavy fishing and boat traffic. When they are born, they weigh 22 lbs and are 3.3 feet long. Although the definite fate of this emergent disease is unknown, the species is at risk.[31]. They include fish, crustaceans, and cephalopods. MarineBio Conservation Society. The amazon river itself is the 2nd largest river in the world (second to the Nile) and spans more than 2,700,000 square miles and stretching from Peru to Brazil. It's flippers are very long and broad. The region within and near the species' range has developed economically; theme parks, casinos, and other entertainment venues that include dolphin shows have increased. They also live in three rivers: the Ayeyarwady (Myanmar), the Mahakam (Indonesian Borneo), and the Mekong River. One of the dolphins was pregnant and before her death was found circling around the bottom of the pool and was found dead early the next morning. [58] The local fishing industry is blamed for the deaths of the dolphins. Many of the dolphins are found dead in the water, and others were washed ashore, said to have been dead for a few days. They intertwine facing their bellies together and begin to copulate for 40 seconds. [57] The dam builders' proposal is to use explosives to dig out the tons of rock. The bacterial infection, chorioamnionitis, is common in many marine animals, but when these few dolphins were taken in, the scientists discovered this same bacterial infection for the first time in this group of dolphins. [48], Some major concern for the population in the Mekong River has arisen due to numerous threats. Bony fish and fish eggs, cephalopods, and crustaceans are taken as food. Fishers in India recall when they would call out to the dolphins, by tapping a wooden key also known as a lahai kway,[19] against the sides of their boats, asking the Irrawaddys to drive fish into their nets. [23], Laotians and Cambodians have a common belief that the Irrawaddy dolphins are reincarnations of their ancestors. These dolphins were said to be dead because of a lack of oxygen. Usually, Irrawaddy dolphins are found dead with bruises and scars on their body, being killed by illegal poaching, but this Irrawaddy dolphin was found dead because of old age. Retrieved 2014-10-19, Marsh H, Lloze R, Heinsohn GE, Kasuya T (1989). [57] The Irrawaddy Dolphin (Orcaella brevirostris) is a species of dolphin native to Southeast Asia. Its dorsal fin, located about two-thirds posterior along the back, is short, blunt, and triangular. Irrawaddies and humbback dolphins were caught and kept in the same tank. Irrawaddy dolphins usually are 7.5-9 feet long and weigh 290 lbs. In terms of color the amazon river dolphin can be white, yellow, pink, brown, gray or black. Please reload the CAPTCHA. Dolphins are marine mammals known as cetaceans and are related to whales and porpoises. Known subpopulations of Irrawaddy dolphins are found in eight places, listed here in order of population, including conservation status. This little (2m – 2.8m / 6-9 feet) dolphin looks like a baby beluga whale. Conservation management of small core areas: key to survival of a Critically Endangered population of Irrawaddy river dolphins, Last edited on 15 November 2020, at 00:34, Museo di storia naturale e del territorio dell'Università di Pisa, Learn how and when to remove this template message, "Proposal for inclusion of species on the appendices of the convention on the conservation of migratory species of wild animals", "Irrawaddy dolphin (Orcaella brevirostris)", https://swfsc.noaa.gov/uploadedFiles/Divisions/PRD/Publications/Zhouetal95(26).pdf, "Large population of endangered dolphins found in Bangladesh", "Study: Bangladesh hosts 6,000 rare dolphins", "Dolphin population rises to 152 in Chilika lake in Orissa", "Irrawaddy dolphin demography in the Mekong River: An application of mark-resight models", "Only 42 left of endangered Irrawaddy dolphins in northern Palawan", "Rare dolphins make Negros coastal waters their home", "Castnet Fishing with the Help of Irrawaddy Dolphins", "Conservation management of small core areas: key to survival of a Critically Endangered population of Irrawaddy river dolphins Orcaella brevirostris in Indonesia", http://eds.a.ebscohost.com/eds/detail/detail?sid=ea3b7b96-709f-4233-b5d0-ed1728842607%2540sessionmgr4005&vid=4&hid=4202&bdata=JnNpdGU9ZWRzLWxpdmU%253d#db=pwh&AN=6E84043988717, "Irrawaddy Dolphins Gain Trade Protection Under CITES; WWF Urges Countries to Stop All Live Captures", "Rare Palawan dolphins now down to 47 - WWF", "Tourism threatens rare Irrawaddy dolphins", "Web of Science [v.5.19] - All Databases Full Record", "CITES takes action to promote sustainable wildlife", "Conservation status of Irrawaddy Dolphins", "Appendix I and Appendix II of the Convention on the Conservation of Migratory Species of Wild Animals (CMS)", "Convention on Migratory Species page on the Irrawaddy Dolphin", "Memorandum of Understanding for the Conservation of Cetaceans and Their Habitats in the Pacific Islands Region", "Asian Dolphin, Feared Dying, Is Thriving", "LAW ON FISHERIES (Unofficial Translation supported by ADB/FAO TA Project on Improving the Regulatory and Management Framework for Inland Fisheries )", "Kratie Declaration Offers Hope for Mekong Dolphins", "Cambodia Creates Safe Zones for Mekong Dolphins", "Integrating Biodiversity and Hydrological Processes into Conservation Planning at the Landscape Scale", "Irrawaddy Dolphins Disappearing from the Mekong", http://eds.a.ebscohost.com/eds/detail/detail?vid=6&sid=9f065f13-9bb4-4c56-ae75-b24d328ff041%2540sessionmgr4002&hid=4111&bdata=JnNpdGU9ZWRzLWxpdmU%253d#AN=G90EPPP20150406.00011&db=pwh, "Site Of Human-dolphin Partnership Becomes Protected Area", "Malampaya Sound Ecological Studies Project", "PGMA to push for sustainable management of Coral Triangle", "Incorporating information about marine species of conservation concern and their habitats into a network of MPAs for the Coral Triangle region (Draft)", "Dozen Irrawaddy dolphins found dead off Thailand's eastern coast", Transcript of briefing by Burmese marine biologist Tint Tun, https://en.wikipedia.org/w/index.php?title=Irrawaddy_dolphin&oldid=988744962, Creative Commons Attribution-ShareAlike License, This page was last edited on 15 November 2020, at 00:34. [3], A female or male dolphin will attempt to pursue a mate for about a few minutes. Groups of fewer than six individuals are most common, but sometimes up to 15 dolphins are seen together. In 2012 in Vietnam, a group of scientists took in four Irrawaddy dolphins and provided them with medical care to see how they would survive. They can dive underwater and hold they breath up to 12 minutes but usually dive for short periods (under 1 min). How to find an internship / volunteering experience? Enforcement, though, is the responsibility of individual countries. They include fish, crustaceans, and cephalopods. When 277 group dives were timed (time of disappearance of the last dolphin in the group to the emergence of the first dolphin in the group) in Laos, mean duration was 115.3 seconds with a range of 19 seconds to 7.18 minutes. If caught in fishing nets, they release the dolphin from the rest of the catch. Some successful, some not.
It has sometimes been listed variously in a family containing just itself and in the Monodontidae and Delphinapteridae. In 2008, the Department of Forestry and Sarawak Forestry Cooperative in Sarawak established a protected area for Irrawaddy dolphins in Santubong and Damai (Kuching Wetland). Poor fishermen refuse to cut and destroy their nets because it would result in too great of an economic loss to save one Irrawaddy dolphin. [26] In 2002, there were more than 80 dolphinariums in at least nine Asian countries.[27]. Unlike any other dolphin, the Irrawaddy's U-shaped blowhole is on the left of the midline and opens towards the front of the dolphin. [36], The species is also covered by the Memorandum of Understanding for the Conservation of Cetaceans and Their Habitats in the Pacific Islands Region (MoU).[37]. [citation needed], Communication is carried out with clicks, creaks, and buzzes at a dominant frequency of about 60 kilohertz, which is thought to be used for echolocation. The Irrawaddy dolphin (Orcaella brevirostris) 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. Irrawaddy dolphins live in coastal areas in South and Southeast Asia.
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