Monitoring the feeding behavior of dugongs in the seagrass bed of a tidal flat.
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- Tsutsumi Chika
- Graduate School of Informatics, Kyoto University
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- Ichikawa Kotaro
- Graduate School of Informatics, Kyoto University
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- Akamatsu Tomonari
- National Research Institute of FisheriesEngineering. Fisheries Research Agency.
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- Arai Nobuaki
- Graduate School of Informatics, Kyoto University
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- Shinke Tomio
- R&D Center, System Intech Co.. Ltd.
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- Hara Takeshi
- Japan Fisheries Resource Conservation Association
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- Kanjana Adulyanukosol
- Phuket Marine Biological Center
Bibliographic Information
- Other Title
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- 干潟の海草藻場におけるジュゴンの摂餌行動モニタリング
- ヒガタ ノ カイソウ モバ ニ オケル ジュゴン ノ セツジ コウドウ モニタリング
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Abstract
Dugongs {Dugong dugon) are herbivorous marine mammals and endangered species. Unfortunately, the lack of basic research especially on use of seagrass patches by dugongs prevents us from taking any effective countermeasures for the conservation. In this study, to monitor feeding behavior of dugongs in the seagrass bed of a tidal flat, we propose a visual-acoustic combined observation method which is comprised of the visual observation and the acoustic observation using a digital camera and automatic underwater sound monitoring systems for dugong (AUSOMS-D). This new observation method was tested in Thai waters. The increase in the number of dugong feeding trails was observed during nighttime by the visual observation. Dugong calls and feeding sounds were recorded by the acoustic observation. The increase of the dugong feeding trails coincided with the feeding sounds. Therefore, the visual-acoustic combined observation method is effective in monitoring feeding behavior of dugongs. This method has technical benefits not to impact both on the dugongs and the seagrass beds.
Journal
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- Journal of Advanced Marine Science and Technology Society
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Journal of Advanced Marine Science and Technology Society 11 (1), 77-80, 2005
Advanced Marine Science and Technology Society
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Details 詳細情報について
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- CRID
- 1390282763099293440
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- NII Article ID
- 10016909392
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- NII Book ID
- AA11607434
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- ISSN
- 21883262
- 13412752
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- NDL BIB ID
- 7890984
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- CiNii Articles
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- Abstract License Flag
- Disallowed