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首页> 外文期刊>Zoological Science >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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Vertical movements of a Mekong giant catfish (Pangasianodon gigas) in Mae Peum Reservoir, Northern Thailand, monitored by a multi-sensor micro data logger

机译：多传感器微数据记录仪监测的泰国北部湄Peum水库中的湄公河巨型cat鱼（Pangasianodon gigas）的垂直运动

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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.
机译：2004年8月，使用深度温度微数据记录仪对一只湄公河巨型cat鱼Pangasianodon gigas的垂直运动进行了3天的监测。使用创新的定时发布系统恢复了记录仪，并通过搜索VHF无线电信号进行定位。发现记录仪距离释放点约2.2公里，并提供了释放后98小时内收集的深度和温度数据（n = 705,128）。鱼在水面以下3 m以内花费了其99％以上的时间。最大游泳深度为5.6 m。实验期间没有尖锐的温跃层。温度对鱼的垂直运动没有任何可检测的影响。溶解氧浓度（DO）被分层，在表面以下的前3 m中，浓度> 60％的饱和度在低于4 m的深度处降至10％的饱和度。发现这种特定的溶解氧分层限制了fish鱼的垂直运动。

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