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上游迁徙鱼在屏障附近的息地选择的个体变化

Rachel Mawer^1,2, Stijn P Bruneel³, Ine S Pauwels⁴

¹Department of Animal Sciences and Aquatic Ecology, Ghent University, Ghent, Belgium. rachel.mawer@ugent.be.

Movement ecology

|August 7, 2023

概括

了解河流障碍物上的鱼类行为是有效管理鱼口管理的关键. 这项研究揭示了个体鱼在上游迁徙时具有独特的息地偏好,这影响了障碍物通道的成功.

科学领域:

鱼类学鱼类学鱼类学
河流生态河流生态
保护生物学保护生物学

背景情况:

淡水鱼的迁徙至关重要,但日益受到河流障碍的阻碍.
现有的鱼道往往无法促进鱼类不受阻碍地通过.
对鱼类行为的进一步研究,包括在壁垒附近的息地偏好,是必不可少的.

研究的目的:

在水电厂上游迁徙期间,评估鱼 (Barbus barbus) 和鱼 (Thymallus thymallus) 的息地选择.
用声学遥测分析息地选择中的个体变异和人口趋势.
确定影响鱼类在壁垒附近移动的关键液压和空间参数.

主要方法:

使用精细尺度的二维声学遥测技术,追踪鱼类在产卵迁徙期间的情况.
步骤选择函数被用来分析20秒的时间步骤中的息地选择.
开发了个人和人口层面的模型,以评估息地使用的变化和一般趋势.

主要成果:

巴贝尔和格雷林都在息地选择中表现出个体差异,深度,流速和速度梯度是共同的因素.
巴贝尔显然更喜欢更快,更深的流动,并与当前的方向移动.
格雷林显示出对比的个体反应,阻碍了一般人口趋势的识别.

结论:

上游迁徙鱼在壁垒附近的息地选择是复杂的,并显示出显著的个体差异.
了解这些个体差异对于改善鱼口的设计和管理至关重要.
步骤选择功能为研究鱼类移动和在改变的河流系统中的息地使用提供了有价值的工具.

关键词:

2D 声学遥测技术精细尺度的遥测技术鱼类的迁徙鱼类的迁徙鱼的通道鱼的通道步骤选择函数的步骤选择功能

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