Preliminary Investigation of Irrawaddy Dolphin (Orcaella brevirostris) in the Bangpakong Estuary, Inner Gulf of Thailand

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Keywords:
Irrawaddy dolphin Orcaella brevirostris conservation Bangpakong estuary

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Sampan Tongnunui
Division of Biological and Natural Resource Science (Conservation Biology Program), Mahidol University, Kanchanaburi Campus, Sai Yok District,Kanchanaburi Province, 71150, THAILAND
Amnuay Wattanakornsiri
3Department of Agriculture and Environment, Faculty of Science, Surindra Rajabhat University, Nok-muang Subdistrict, Muang District, Surin Province, 32000, THAILAND
Katavut Pachana
4Department of Chemistry, Faculty of Science, Burapha University, Bang Saen, Chonburi, 20131, THAILAND
Frederick W.H. Beamish
Environmental Science Program, Faculty of Science, Burapha University, Bang Saen, Chonburi, 20131, THAILAND
Surasak Tongsukdee
Marine and Coastal Resources Research Center (Upper Gulf of Thailand), Department of Marine and Coastal Resources, 120/1Moo 6, Bang Yah Praek Sub-district,Muang District, Samut Sakhon Province 74000, THAILAND

Abstract

Approximately 20 to 25 individuals of the Irrawaddy dolphin (Orcaella brevirostris) were found in one school in the Bang Pakong estuary, Thailand. The estuary covers an area of 135 km2. The habitat characteristics of the Irrawaddy are waters which are rather turbid and with a depth of 2-5 metres. Within the school, it was found that individuals tended to group in numbers of between 2 and 6. The mean group size was 2.5 ± 3.0 individuals. Eleven dorsal fin shape characteristics of Irrawaddy were identified from photo identification. The technique was used to monitor the dolphin population.

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How to Cite
Tongnunui, S., Wattanakornsiri, A., Pachana, K., Beamish, F. W., & Tongsukdee, S. (2017). Preliminary Investigation of Irrawaddy Dolphin (Orcaella brevirostris) in the Bangpakong Estuary, Inner Gulf of Thailand. Environment and Natural Resources Journal, 9(2), 48–57. Retrieved from https://ph02.tci-thaijo.org/index.php/ennrj/article/view/82478
Issue
Vol. 9 No. 2 (2011): May-Aug
Section
Original Research Articles

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