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タイトル: | Dispersal processes of head-started hawksbill turtles (Eretmochelys imbricate) in the Yaeyama Islands waters, Okinawa, Japan |
著者: | OKUYAMA, JUNICHI SHIMIZU, TOMOHITO ABE, OSAMU YOSEDA, KENZO ARAI, NOBUAKI ![]() |
キーワード: | Eretmochelys imbricata head-starting ultrasonic telemetry circadian rhythm |
発行日: | 2005 |
出版者: | Graduate school of Informatics, Kyoto University |
誌名: | Proceedings of the 2nd International symposium on SEASTAR2000 and Asian Bio-logging Science (The 6th SEASTAR2000 Workshop) |
開始ページ: | 63 |
終了ページ: | 68 |
抄録: | Behaviors of five head-started hawksbill turtles (Eretmochelys imbricata) attached with ultrasonic transmitters were monitored using 12 ultrasonic receivers set up along the reef edge. The head-started turtles were reared for two years in the Yaeyama Station, National Center for Stock Enhancement. Four of five head-started turtles moved out of the monitoring area, but their movements are not linearly. The duration the four head-started ones stayed in the monitoring area ranged from 4 to 14 days. All of the head-started turtles had a circadian rhythm to their behaviors. The other head-started turtle stayed around the release point for 88 days until it was recaptured by a fisherman. There was not much difference in diving depth between the head-started and the wild turtles reported by other sites. These results indicate that the head-started turtles tend to wander aimlessly in the natural environment, although they have natures of a circadian rhythm and diving technique. |
記述: | Organized by Graduate School of Informatics, Kyoto University ; JSPS Bangkok Liaison Office ; Japanese Society of Bio-logging Science ; Informatics Research Center for Development of Knowledge Society Infrastructure December 13-14, 2005, Siam City Hotel, Bangkok, Thailand |
URI: | http://hdl.handle.net/2433/44086 |
出現コレクション: | Proceedings of the 2nd International symposium on SEASTAR2000 and Asian Bio-logging Science (The 6th SEASTAR2000 Workshop) |
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