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首页> 外文会议>International Symposium on Advances in Fish Tagging and Marking Technology >Diel Oscillations in Whale Shark Vertical Movements Associated with Meso- and Bathypelagic Diving
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Diel Oscillations in Whale Shark Vertical Movements Associated with Meso- and Bathypelagic Diving

机译：与中间和沐浴型潜水相关的鲸鲨垂直运动中的Diel振荡

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A female whale shark Rhincodon typus satellite tagged off the coast of Mozambique and moving to the east coast of Madagascar where the tag popped off after 87 d showed increased meso- and bathypelagic diving while crossing the ba-thymetrically nonconstraining southern part of the Mozambique Channel. After three weeks with daily maximum diving depths in the epipelagic zone at the beginning of the track, when the whale shark stayed close to the Mozambique coast, 44 and 19 d with maximum diving depths in the meso- and bathypelagic zones, respectively, were recorded. On a total of 10 d the whale shark dived to the maximum depth (1,285.7 m) the pop-off tag could record. Quantitative analysis of the diving time series using Fast Fourier Transform identified a diel cycle of vertical movements, with deeper depths occupied during the day and shallower depths during daytime. Using a single bandpass filter to identify where in the time series the diel oscillations were most pronounced showed that they were mostly associated with periods of meso- and bathypelagic diving during the oceanic phase of the long-distance movement. These data indicate that meso- and bathypelagic diving is common for whale sharks in bathymetrically nonconstraining habitat, expandingthe habitat of this circumglobal species into the bathypelagic realm, and support the hypothesis that these were dives related to foraging behavior when crossing less productive deep oceanic waters.
机译：一位女性鲸鲨Rhincodon Typus卫星被标记为莫桑比克的海岸，然后搬到马达加斯加的东海岸，在87 d后，在莫桑比克渠道的南部胸部非关键南部的南部的Ba-thymetragic潜水时，标签显示出来的标签。在轨道开始时的每日最大潜水深度在轨道上的每日最大潜水深处，当鲸鲨靠近莫桑比克海岸靠近莫桑比克海岸时，录制了中间和沐浴区中的最大潜水深度，分别被记录，被记录。总共10 d将鲸鲨置于最大深度（1,285.7 m），弹出标签可能会记录。使用快速傅里叶变换的潜水时间序列的定量分析确定了垂直运动的二环循环，在白天占用了更深的深度，白天期间的深度较浅。使用单个带通滤波器来识别在时间序列中的位置，Diel振荡最明显显示它们主要与长距离运动的海洋阶段期间的中间阶段和浴铝潜水的时期相关。这些数据表明，中间和浴铝潜水是鲸鱼鲨鱼在沐浴般的非共产栖息地的鲸鱼中常见，将这种涵管物种的栖息地扩展到浴缸域中，并支持与穿越较少生产深层海洋水域时的觅食行为潜水的假设。

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