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首页> 外文期刊>Aquacultural Engineering: An International Journal >Influence of tank geometry and flow pattern in fish distribution.
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Influence of tank geometry and flow pattern in fish distribution.

机译：水箱的几何形状和流动方式对鱼类分布的影响。

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The effect of hydrodynamics on fish distribution (Danio rerio) was studied in two tank configurations: rectangular, with three waterfalls, and circular. The flow pattern of each tank was characterised in a previous paper by using particle tracking velocimetry (PTV) techniques. Image analysis was used as a non-intrusive method to determine spatial fish distribution in the tank by collecting fish position coordinates from the recorded sequences. The tank was divided into cells in order to establish the fish distribution pattern. A ratio of fish occupation in each cell was determined and statistically analysed for three replicates of the experiment. The fish occupation ratio was also correlated with the average velocity in the corresponding cell. Furthermore, a fish distribution coefficient of uniformity (FCU) was defined to evaluate the homogeneity of fish distribution in the tank volume. The rectangular tank showed a strong gradient in the fish distribution pattern from water inlet to outlet, where the average velocity was very low, and a low uniformity in fish distribution was obtained in the whole tank (FCU=0.26). The circular tank showed a gradient in the fish distribution pattern and in velocities from the centre to the outer perimeter, providing velocities from 0.54 to 1.76 BL s-1, respectively. A more uniform fish distribution in the tank was obtained (FCU=0.70), indicating a better use of the entire rearing volume. Velocity in this tank strongly influenced fish occupation, with a positive correlation (r=0.85) and a significant linear regression (P<0.05).Digital Object Identifier http://dx.doi.org/10.1016/j.aquaeng.2010.12.002
机译：在两个水箱配置中研究了水动力对鱼类分布的影响（矩形，三个瀑布，圆形）。在先前的论文中，使用粒子跟踪测速技术（PTV）对每个水箱的流动模式进行了表征。通过从记录的序列中收集鱼的位置坐标，将图像分析用作一种非侵入性方法来确定鱼缸中空间鱼的分布。将水箱分成多个小室，以建立鱼的分布模式。测定每个细胞中鱼的占有率，并对该实验的三个重复进行统计分析。鱼的占有率也与相应细胞的平均速度相关。此外，定义了鱼均匀分布系数（FCU）来评估鱼缸容积中鱼分布的均匀性。矩形水箱在从进水到出水的鱼分布模式中表现出很强的梯度，平均速度非常低，并且整个水箱的鱼分布均匀性很低（FCU = 0.26）。圆形水箱在鱼类分布方式和从中心到外围的速度上显示出梯度，分别提供0.54至1.76 BL s -1 的速度。鱼缸中鱼的分布更加均匀（FCU = 0.70），表明可以更好地利用整个饲养量。这个水箱的速度强烈影响鱼类的生存，具有正相关（ r = 0.85）和显着的线性回归（ P <0.05）。数字对象标识符http：// dx.doi.org/10.1016/j.aquaeng.2010.12.002

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