青棕鱼对水上冲浪的微型运动反应
Robert Naudascher1, Robert M Boes2, Vicente Fernandez3
1Institute of Environmental Engineering, Department of Civil, Environmental and Geomatic Engineering, ETH Zurich, Laura-Hezner-Weg 7, Zurich 8093, Switzerland; Laboratory of Hydraulics, Hydrology and Glaciology, Department of Civil, Environmental and Geomatic Engineering, ETH Zurich, Hönggerbergring 26, Zurich 8093, Switzerland.
The Science of the total environment
|September 1, 2024
概括
青春期棕鱼 (Salmo trutta) parr迅速调整其细微的运动,以应对在水上活动期间水流的快速变化. 这些行为反应有助于它们在改变的水力动力学条件下保持位置并最大限度地减少能源消耗.
科学领域:
- 生态生态学 生态生态学
- 鱼类学 鱼类学 鱼类学
- 环境科学 环境科学
背景情况:
- 水上爬行事件通过浅和漂移显著影响幼鱼种群.
- 了解鱼类对改变水深和流速的反应对于保护至关重要.
研究的目的:
- 在模拟的水上潜水条件下量化棕鱼parr (Salmo trutta) 的微小尺度运动行为.
- 研究野生和化场养的幼鱼对快速液压变化的行为适应.
主要方法:
- 结合流体实验与基于图像的鱼类跟踪.
- 暴露于棕鱼的基础流和十倍增加的峰值流条件在一个异质的息地.
- 量化了鱼类的运动,横向占用和游泳行为.
主要成果:
- 鱼类在排放增加时迅速移动到浅处,低速度区域,显著改变横向占用.
- 在高潮期间,鱼类利用石块周围的位置和诸如弓骑等行为来节省能量,减少60-70%的游泳距离.
- 鱼类开始更快地搬迁,在排放下降时移动更快,下降速度更高.
结论:
- 色鱼parr表现出快速有效的行为反应,以导航快速的水力动力学变化.
- 这些发现可以为息地建模和减轻水上冲击对鱼群影响的减缓策略提供信息.
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