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タイトル: | Seasonal characterization of dugong feeding and biomass utilization on selected sites in Talibong Island |
著者: | AMAMOTO, NANAKO ICHIKAWA, KOTARO https://orcid.org/0000-0003-4377-7103 (unconfirmed) ARAI, NOBUAKI AKAMATSU, TOMONARI SHINKE, TOMIO HARA, TAKESHI ADULYANUKOSOL, KANJANA |
キーワード: | seagrass bed passive acoustic monitoring feeding event feeding efficiency |
発行日: | Mar-2009 |
出版者: | Graduate school of Informatics, Kyoto University |
誌名: | Proceedings of the 4th International Symposium on SEASTAR2000 and Asian Bio-logging Science (The 8th SEASTAR2000 workshop) |
開始ページ: | 41 |
終了ページ: | 43 |
抄録: | Dugong (Dugong dugon) is an herbivorous marine mammal and feeds almost exclusively on sea grass. Previous observation of the dugong feeding behavior revealed that they feed even at intertidal flats where the sea grass beds are completely exposed in the air during low tide and also at other deeper sites, where the tidal range is about 2-6m. We used a passive acoustic monitoring system to monitor their feeding behavior. Dugongs’ feeding sounds were collected at two feeding grounds at an intertidal flat and a deep site. From the result of the comparison of feeding events during daytime to nighttime, we found dugongs mainly feed during the night (Welch t-test p<0.05). We also collected sea grasses at each feeding ground and compared the species composition of sea grasses and density of sea grass between the two sites. We calculated the feeding efficiency from the density of sea grass before and after dugong’s feeding at each site and compared to them. These comparisons revealed that there was no significant difference in the amount of sea grasses fed upon by dugong between the two feeding grounds. |
記述: | December 15-17, 2007, Royal Phuket City Hotel, Phuket, Thailand |
URI: | http://hdl.handle.net/2433/71024 |
出現コレクション: | Proceedings of the 4th International Symposium on SEASTAR2000 and Asian Bio-logging Science (The 8th SEASTAR2000 workshop) |
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