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3rdSEASTAR2000_27.pdf | 807.22 kB | Adobe PDF | 見る/開く |
タイトル: | ANALYSIS OF MEKONG GIANT CATFISH BEHAVIOR USING A DATA LOGGER |
著者: | MITSUNAGAl, Yasushi YAMAGISHl, Yukiko ARAI, Nobuaki SAKAMOTO, Wataru |
キーワード: | Mekong giant catfish data logger activity rhythm nocturnal characteristic |
発行日: | 2002 |
出版者: | Graduate School of Informatics, Kyoto University |
誌名: | Proceedings of the 3rd Workshop on SEASTAR2000 |
開始ページ: | 27 |
終了ページ: | 30 |
抄録: | Temperature and depth data logger was attached to Mekong giant catfish to observe their swimming behavior in a rearing pond. Four artificial seed reared in the Karasin Freshwater Research Station, Thailand were used to obtain the body temperature and fish position on water depth. The fish were anesthetized and implanted with a data logger (DST milli, Star-oddi Co., Iceland) into the body cave on 2 May 2002. One data logger was retrieved and body temperature and depth data were obtained for about one month. The fish moved to relatively deeper layer after sunrise and stayed there in the morning. In the afternoon the fish became active gradually and began to move vertically. After sunset the fish got more active and moved vertically from the surface to the bottom of the pond until the next sunrise. At sunrise the fish stopped the vertical movement. It seems that Mekong giant catfish have a nocturnal characteristic and get most active at twilight. |
記述: | Southeast Asia Sea Turtle Associative Research Bangkok, Thailand, 16-19 December 2002 |
URI: | http://hdl.handle.net/2433/44153 |
出現コレクション: | Proceedings of the 3rd Workshop on SEASTAR2000 |
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