Ontogeny of form and function: Locomotor morphology and drag in zebrafish (Danio rerio)
Ontogeny of form and function: Locomotor morphology and drag in zebrafish (Danio rerio)
复制标题
形式和功能的个体发育：斑马鱼（Danio rerio）的运动形态和阻力
作者：
M. McHenry;G. Lauder
许多鱼类在生长过程中会改变体型，但目前还不清楚这是如何影响运动机制的。因此，本研究的重点是了解如何在滑行阻力的产生是影响个体发育的斑马鱼（Danio rerio）的形态变化。身体和鳍的形状是从大小不等的鱼的照片中测量的，从小的幼虫到成熟的成年鱼，这些形态计量学与从常规游泳的高速视频记录中计算的阻力系数进行比较。我们发现，粘性阻力系数的幼虫和少年鱼的增长超过一个数量级，在成长和惯性阻力系数下降在一个可比的速度在成人。这些水动力学的变化发生的斑马鱼不成比例地增加了他们的鳍的跨度和他们的身体改变形状从细长到流线型，反映了一个新定义的流线型指数，SL的逻辑增长。这些结果表明，形态的变化产生更大的阻力时，幼虫和青少年在粘性制度的性能成本，但后来提供了一个性能的好处，通过减少压力阻力在惯性制度的成年阶段。J. Morphol.© 2006 Wiley利斯公司
Many fish species transform in body shape during growth, but it remains unclear how this influences the mechanics of locomotion. Therefore, the present study focused on understanding how drag generation during coasting is affected by ontogenetic changes in the morphology of zebrafish (Danio rerio). The shapes of the body and fins were measured from photographs of fish ranging in size from small larvae to mature adults and these morphometrics were compared to drag coefficients calculated from high‐speed video recordings of routine swimming. We found that the viscous drag coefficient of larval and juvenile fish increased by more than an order of magnitude during growth and the inertial drag coefficient decreased at a comparable rate in adults. These hydrodynamic changes occurred as zebrafish disproportionately increased the span of their fins and their body changed shape from elongated to streamlined, as reflected by the logistic growth of a newly defined streamlining index, SL. These results suggest that morphological changes incur a performance cost by generating greater drag when larvae and juveniles operate in the viscous regime, but later provide a performance benefit by reducing pressure drag in the inertial regime of the adult stage. J. Morphol. © 2006 Wiley‐Liss, Inc.
影响因子：
3.8
作者：
Robertson, Stephanie;Ronnlund, Caroline;Hartman, Johan
通讯作者：
Hartman, Johan