Spawning behaviour of Allis shad Alosa alosa: new insights based on imaging sonar data.
Spawning behaviour of Allis shad Alosa alosa: new insights based on imaging sonar data.
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Allis shad Alosa alosa 的产卵行为：基于成像声纳数据的新见解。
DOI：
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发表时间：
2016
影响因子：
2
通讯作者：
J. Borcherding
中科院分区：
文献类型：
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作者：
M. Langkau;D. Clavé;M. B. Schmidt;J. Borcherding
利用高分辨率成像声纳观测了黄的产卵行为。探测到的性产品云和微气泡是产卵活动的潜在指标。产卵高峰期在夜间0130 - 0200之间。增加检测连续三个晚上的交配事件（公牛）的声音在听力调查中评估的水声检测平行一致。在70%的分析交配事件中，没有额外的A。而70%的交配事件显示一个或两个A. Alosa离开云。然而，在31%的分析交配事件中，三个或更多的A。阿罗萨离开了云层，表明交配并不局限于一对。成像声纳适用于监测产卵活动和行为的溯河产卵类在其产卵栖息地。
Spawning behaviour of Alosa alosa was observed by high resolution imaging sonar. Detected clouds of sexual products and micro bubbles served as a potential indicator of spawning activity. Peak spawning time was between 0130 and 0200 hours at night. Increasing detections over three consecutive nights were consistent with sounds of mating events (bulls) assessed in hearing surveys in parallel to the hydro acoustic detection. In 70% of the analysed mating events there were no additional A. alosa joining the event whilst 70% of the mating events showed one or two A. alosa leaving the cloud. In 31% of the analysed mating events, however, three or more A. alosa were leaving the clouds, indicating that matings are not restricted to a pair. Imaging sonar is suitable for monitoring spawning activity and behaviour of anadromous clupeids in their spawning habitats.