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Irrawaddy dolphins (Orcaella brevirostris) being on top of the food chain are considered as a flagship species of Chilika. These cetaceans produce characteristic echolocation pulses that make them acoustically visible, night or day. Acoustic-based survey methods are found to be indispensable for surveying porpoises and dolphins in coastal precincts. This paper reports the first such collaborative...
Finless porpoise populations in coastal precincts are adversely impacted by human activities that cause water pollution, lack of food and denial of migratory paths. Proper survey and management of their populations has therefore become necessary. Visual-based surveys are very tedious, labor intensive, have limited accuracy, and are strongly subject to visibility conditions. These cetaceans produce...
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