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Occurrence of Indo-Pacific Bottlenose Dolphins Tursiops aduncus off Jeju Island, Korea during the Early 2000s
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 Title & Authors
Occurrence of Indo-Pacific Bottlenose Dolphins Tursiops aduncus off Jeju Island, Korea during the Early 2000s
Kim, Hyun Woo; Sohn, Hawsun; An, Yong-Rock; Park, Kyum Joon; Choi, Young-Min;
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The Indo-Pacific bottlenose dolphin Tursiops aduncus commonly inhabits the coastal waters of Jeju Island, Korea. An investigation was conducted using data from vessel sightings and point sightings from land. During 40 days of vessel sighting surveys between 2007 and 2010, a total of 18 dolphin groups were encountered. The overall sighting rate was 0.01 group/n.m. Most Indo-Pacific bottlenose dolphins were sighted within 500 m of the northern coast of Jeju Island during surveys. Also, dolphin groups were observed 47 times during 109 days of shore-based surveys conducted between 2011 and 2015. The results of a dolphin distribution survey conducted in 2011 were generally similar to the results of previous surveys. However, there were no dolphin sightings from 2012 in Hanllim-eup, in the north-western part of the island, where dolphins were sighted frequently until 2011, whereas dolphin observations increased in the southern part of the island. The mean group size was 35.4 (SD
Indo-Pacific bottlenose dolphin;Jeju Island;Sighting;Group size;Tursiops aduncus;
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