Quantification of the microscale dynamics of live bighead carp egg settlement in static water
Quantification of the microscale dynamics of live bighead carp egg settlement in static water
复制标题
静态水中活鳙鱼卵沉降微观动力学的量化
DOI：
10.1002/rra.3789
复制
发表时间：
2021-03
影响因子：
2.2
通讯作者：
Liu Xiaoguang
中科院分区：
文献类型：
--
作者：
Wan Yunjiao;Zeng Yuhong;Li Mingzheng;Liu Xiaoguang
河道工程建设和运营对鳙鱼的生存构成威胁。为了指导未来的水库调度适当考虑鱼类的生态需求，了解鱼卵在静态水中的沉降非常重要。因此，实验中采用视频采集技术和小波分析技术，对活鳙鱼卵在静水中沉降的微观过程进行观察和分析。该研究检查了鸡蛋属性的时间变化，并揭示了鸡蛋轨迹的微观波动和沉降速度的变化。蛋沉降速度分为平均分量和波动分量。这两种成分都表明，鳙鱼卵根据发育阶段具有不同的沉降速度。在受精后的前22分钟内，沉降速度主要由水动力阻力决定，随着时间的推移，速度快速增加，随后速度下降，最后稳定在0.75cm/s。波动分量的周期性可能表明蛋内部结构甚至胚胎发育对沉降速度的重要性。这项工作加强了对静止水中鳙鱼卵沉降的理解，并为河流工程师和管理者提供了明确的指示，即需要促进鳙鱼卵在河流中成功漂流，以确保其种群的维持。
The survival of bighead carp is threatened by the construction and operation of river engineering projects. In order to guide future reservoir regulation to suitably incorporate the ecological requirements of fish, it is important to understand fish egg settlement in static water. Therefore, video capture technology and wavelet analysis in experiments were used to observe and analyze the microscale processes of live bighead carp egg settlement in static water. The study examined the temporal variations in the egg attributes and revealed microscale fluctuations in the trajectories of eggs and changes in settling velocity. The egg settling velocities were divided into both mean and fluctuating components. Both components indicated that bighead carp eggs had different settling velocities depending on the stage of development. Settling velocity is dominated by hydrodynamic drag in the first 22 min post‐fertilization, with a rapid increase in velocity through time, followed by a decrease in velocity and finally a stable value of 0.75 cm/s. The periodicity of the fluctuating component may indicate the importance of the egg inner structure or even the development of the embryo to settling velocity. This work strengthens the understanding of bighead carp egg settlement in static water and provides a clear indication to river engineers and managers of the need to promote the successful drift of bighead carp eggs in rivers to ensure the maintenance of their populations.
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影响因子：
5.4
作者：
DIETRICH, WE
通讯作者：
DIETRICH, WE
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DOI：
10.1016/j.proenv.2010.10.207
发表时间：
2010
期刊：
Procedia Environmental Sciences
影响因子：
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作者：
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通讯作者：
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影响因子：
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作者：
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作者：
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影响因子：
1.4
作者：
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通讯作者：
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