Passive acoustic monitoring of the distribution patterns of Irrawaddy dolphins (Orcaella brevirostris) in the middle reaches of the Ayeyarwady River, Myanmar

The Irrawaddy dolphins (Orcaella brevirostris) are an endangered species. Thus, up‐to‐date information on the distribution pattern of dolphins is critical for its proper management and conservation. Using a towed passive acoustic monitoring device, the distribution pattern of the Irrawaddy dolphins...

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Bibliographic Details
Published in:Marine mammal science 2020-10, Vol.36 (4), p.1241-1253
Main Authors: Wang, Zhi‐Tao, Duan, Peng‐Xiang, Akamatsu, Tomonari, Wang, Ke‐Xiong, Wang, Ding
Format: Article
Language:English
Subjects:
Acoustics
Aquatic mammals
Ayeyarwady River
biosonar click
Boats
Cetacea
Distribution
Distribution patterns
Dolphins
Dolphins & porpoises
Downstream
Echolocation
Endangered species
Freshwater mammals
Irrawaddy dolphins
Marine mammals
Monitoring
Orcaella brevirostris
passive acoustic monitoring
Polls & surveys
Rare species
Relative abundance
river dolphins
Rivers
Segments
Surveying
Surveys
Upstream
Water levels
Wildlife conservation
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Summary:The Irrawaddy dolphins (Orcaella brevirostris) are an endangered species. Thus, up‐to‐date information on the distribution pattern of dolphins is critical for its proper management and conservation. Using a towed passive acoustic monitoring device, the distribution pattern of the Irrawaddy dolphins in the middle reaches of the Ayeyarwady River, Myanmar, was investigated during a vessel‐based survey between Mingun and Katha. This region was successively divided into segments 1–4 from upstream to downstream. Sixteen echolocation encounters, with a series of click trains separated by
ISSN:0824-0469
1748-7692
DOI:10.1111/mms.12713