Vertical Movements of a Mekong Giant Catfish (Pangasianodon gigas) in Mae Peum Reservoir, Northern Thailand, Monitored by a Multi-Sensor Micro Data Logger

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概要

• 論文の詳細を見る

• The vertical movements of one Mekong giant catfish Pangasianodon gigas were monitored for 3 days in August 2004 using a depth-temperature micro data logger. The logger was recovered using an innovative time-scheduled release system and located by searching for VHF radio signals. The logger was found approximately 2.2 km away from the release point and provided (n=705,128) depth and temperature data collected over a period of 98 hours following the release. The fish spent more than 99% of its time at less than 3 m below the surface. The maximum swimming depth was 5.6 m. No sharp thermocline was present during the experiment. Temperature did not have any detectable effect on the pattern of vertical movement of the fish. The dissolved oxygen concentration (DO) was stratified, with a concentration of >60% saturation in the first 3 m below the surface falling to 10% saturation at depths lower than 4 m. This specific DO stratification was found to limit the vertical movement of the catfish.

• Zoological Society of Japanの論文

著者

• MITAMURA HIROMICHI

  Graduate School of Informatics, Kyoto University

• ARAI NOBUAKI

  Graduate School of Informatics, Kyoto University

• Arai N

  Graduate School Of Informatics Kyoto University

• Arai Nobuaki

  Graduate School Of Informatics Kyoto University

• Mitsunaga Yasushi

  Faculty Of Agriculture Kinki University

• Mitamura Hiromichi

  Graduate School Of Informatics Kyoto University

• Mukai Y

  Kinki Univ. Nara Jpn

• Mitsunaga Yasushi

  Faculty of Agriculture, Kinki University

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