101+ Ways | Join our Group | Donate | Shop, Symbionts, Parasites, Hosts & Cooperation, The Structures & Adaptations to Marine Living, Marine Science/Ocean Life Related Journals, Marine Biology Laboratories, Institutes & Graduate Programs, Worldwide Aquariums and Marine Life Centers, Frontline Marine Conservation/Science Support, Worldwide Aquariums & Marine Life Centers, Current IUCN Conservation Status of Irrawaddy Dolphins, UNEP World Conservation Monitoring Centre: Irrawaddy Dolphins, Check the Seafood Watch List for this species, Irrawaddy dolphin demography in the Mekong River: an application of mark–resight models, Thousands of rare Irrawaddy dolphins found (1/12). There are plenty of food items that this dolphin feeds upon. The Irrawaddy Dolphin is a critically endangered species that inhabits murky waters of rivers and estuaries in Southeast and South Asia. The dolphin surfaces in a rolling fashion and often lifts its flukes (tail fins) clear of the water for a deep dive. A moment of the cooperative fishing between Myanmar fishermen and Irrawaddy dolphins. They have also been caught in anti-shark gillnets in Australia and have become entangled in fishing gear in other areas. This tradition is part of Myanmar’s rich natural and cultural heritage and is one of the best examples of a symbiotic relationship between man and nature. Read more about the Irrawaddy River ecosystem. Melville’s Whale Was a Warning We Failed to Heed, Amanda Jelena Radoman: Manatees being fed sweet potatoes… while looking like sweet potatoes, Trying to Make Sense of This Overwhelming World. Feeding. These prey entrapments occur slightly below the water surface level. OUR DATA: We use the most recent data from these primary sources: AnAge, UMICH, Max Planck, PanTHERIA, Arkive, UKC, AKC. The life span of Irrawaddy dolphin is estimated to be 30 to 50 years. Although the original range of the Irrawaddy dolphin reached from India and Bangledesh in the northwest down through Southeast Asia to Indonesia and possibly even as far east and south as Papua New Guinea, this endangered aquatic mammal is now found in only three rivers in the world: the Ayeyawady in Myamar; the Mekong in Cambodia and Lao PDR; and the Mahakham in Indonesia. “A little gift from Cozumel Island Mexico / a little gift from Cozumel Island Mexico.”. Community-based ecotourism in the ADPA is currently being developed to create a link between tourism and conservation and to provide visitors with a quality educational experience focusing on the uniqueness of the human-dolphin cooperative fishing phenomenon, local culture, and other natural attractions including observing migratory water birds. Webber, FAO species identification guide, Marine mammals of the world, Rome, FAO. In December 2005, the Ayeyawady Dolphin Protected Area (ADPA) was established as the first national aquatic protected area in Myanmar by the Department of Fisheries, with support from WCS, to protect this critically endangered species and a biologically unique human-dolphin cooperative fishery. Like other river dolphins their neck is highly flexible, which enables them to forage in shallow water. It is the only dolphin known to spit a stream of water for a deep dive and to spit fish and sometimes spit for social interactions. Social structure, Reproduction and growth. Habitat and subpopulations. Habitat and subpopulations. Current IUCN Conservation Status of Irrawaddy Dolphins|Conservation Evidence|NOAAUNEP World Conservation Monitoring Centre: Irrawaddy Dolphins|Check the Seafood Watch List for this species. Disclosure Policy | Privacy Policy | Copyright © 2020 WhaleFacts.org. It is thought that they reach sexual maturity when they are around 4-6 years old. When it comes to cetaceans estimating the life expectancy of 40 or so species of dolphin can be quite a challenge as there is no specific answer for all of the species. Irrawaddy dolphins, Orcaella brevirostris (Owen in Gray, 1866), aka Mekong or Mahakam River dolphin, reach 2-2.75 m in length. A dolphins species also plays a big role in determining how long a dolphin will live. There are plenty of food items that this dolphin feeds upon. There is now roughly a minimum of 60 dolphins left in the Ayeyawady River, in addition to approximately 80-100 individuals left in each of the Mekong and Mahakham Rivers. Similar to bats and other dolphins, the Irrawaddy dolphin uses echolocation to find fish, navigate and interact with each other. The first scientific survey of dolphins in Myanmar was conducted in 2002, which found them to be found in a 400 km stretch of river between Bhamo and Mingun. They have narrow, pointed, peg-like teeth about 1 cm in length in both their upper and lower jaws. Irrawaddy dolphin demography in the Mekong River: an application of mark–resight models Thousands of rare Irrawaddy dolphins found (1/12). GBIF network ~ OBIS distribution map ~ AquaMaps. During foraging periods, herds of about 7 dolphins will circle around prey and trap their victim. Habitat loss and degradation is also a major contributing threat in many freshwater areas, especially from existing and planned dams in the Mekong and Ayeyarwady rivers, and in coastal estuarine habitat from declining freshwater flows, increasing commercial vessel traffic and pollution. Factors such as diet (captive dolphins are often fed a strict diet that may not include the prey they normal consume or be prepared in a way they would normally consume it), a closed environment (being separated from the wide and open ocean) and a lack of a strong social structure (being separated from family and potential friends) may all contribute to the shorter lifespan of captive dolphins. This practice has been documented to yield a greater catch for the fishermen. The ADPA stretches 74 km of river starting from Mingun in the south up to Kyaukmyaung and Singu townships in the north. The species generally occurs in small groups of 2-7 individuals, but sometimes may travel in groups as large as 14. Irrawaddy dolphins, Orcaella brevirostris (Owen in Gray, 1866), aka Mekong or Mahakam River dolphin, reach 2-2.75 m in length. Little is known about Irrawaddy dolphins’ life history. Luckily there are some facts and estimates that have been acquired about certain dolphin species which can help bring clarity to this topic and provide some good assumptions to the average lifespan of these marine mammals. Similar to bats and other dolphins, the Irrawaddy dolphin uses echolocation to find fish, navigate and interact with each other. In Myanmar, this amazingly cleaver and intelligent species has learned to fish in a mutually beneficial way together with cast net fishermen, termed “cooperative fishing”—a phenomenon found nowhere else in the world. Feeding. Irrawaddy dolphins feed on fish, shrimp and probably other crustaceans.
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