Hydrodynamics of the escape response in bluegill sunfish, Lepomis macrochirus.
Hydrodynamics of the escape response in bluegill sunfish, Lepomis macrochirus.
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DOI：
10.1242/jeb.020917
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发表时间：
2008-11
期刊：
影响因子：
--
通讯作者：
Lauder GV
中科院分区：
文献类型：
--
作者：
Tytell ED;Lauder GV
鱼类的逃避反应是脊椎动物最具代表性的行为之一，对惊吓反应的神经控制和生物力学都有广泛的研究。然而，知之甚少的流体动力学的逃生反应，尽管事实上，了解流体的流动模式，在逃生过程中是至关重要的评估身体运动如何将电力转移到流体，用于定义发电的时间过程，并为表征逃脱的鱼类留下的尾流签名，这可能会提供信息的掠食者。在本文中，我们提出了一个实验的水动力学分析的C-启动逃逸反应的蓝鳃太阳鱼（Lepomis macrochirus）。我们使用时间分辨的数字粒子图像测速仪在1000 fps的图像流模式在逃逸响应。我们分别从背鳍和臀鳍产生的身体所产生的流型进行了分析，以评估这些中鳍对逃逸动量的贡献。每次逃避反应都会产生三股不同的液体射流。总结射流中的流体动量分量提供了鱼动量的估计值，该估计值与从逃逸的鱼体测量的动量没有显著差异。与以前的运动学分析和理论模型得出的结论相反，尾鳍产生的动量，反对在第一阶段的逃生，而身体弯曲在第一阶段贡献了大量的推进动量。此外，背鳍和臀鳍都贡献了巨大的动量。研究结果强调了背鳍和臀鳍作为推进器的重要性，并表明这些鳍的大小和位置可能是快速启动性能的关键决定因素。
Escape responses of fishes are one of the best characterized vertebrate behaviors, with extensive previous research on both the neural control and biomechanics of startle response performance. However, very little is known about the hydrodynamics of escape responses, despite the fact that understanding fluid flow patterns during the escape is critical for evaluating how body movement transfers power to the fluid, for defining the time course of power generation, and for characterizing the wake signature left by escaping fishes, which may provide information to predators. In this paper we present an experimental hydrodynamic analysis of the C-start escape response in bluegill sunfish (Lepomis macrochirus). We used time-resolved digital particle image velocimetry at 1000 fps to image flow patterns during the escape response. We analyzed flow patterns generated by the body separately from those generated by the dorsal and anal fins, to assess the contribution of these median fins to escape momentum. Each escape response produced three distinct jets of fluid. Summing the components of fluid momentum in the jets provided an estimate of fish momentum that did not differ significantly from momentum measured from the escaping fish body. In contrast to conclusions drawn from previous kinematic analyses and theoretical models, the caudal fin generated momentum that opposes the escape during stage one, while the body bending during stage one contributed substantial propulsive momentum. Additionally, the dorsal and anal fins each contributed substantial momentum. The results underscore the importance of the dorsal and anal fins as propulsors and suggest that the size and placement of these fins may be a key determinant of fast start performance.
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影响因子：
1.6
作者：
Hale, ME
通讯作者：
Hale, ME
DOI：
10.1139/z91-399
发表时间：
1991-11-01
期刊：
CANADIAN JOURNAL OF ZOOLOGY-REVUE CANADIENNE DE ZOOLOGIE
影响因子：
--
作者：
FRITH, HR;BLAKE, RW
通讯作者：
BLAKE, RW
影响因子：
2.8
作者：
Drucker, EG;Lauder, GV
通讯作者：
Lauder, GV
影响因子：
2.8
作者：
Goldbogen, JA;Shadwick, RE;Gosline, JM
通讯作者：
Gosline, JM
影响因子：
2.8
作者：
Adolph, Stephen C.;Pickering, Trevor
通讯作者：
Pickering, Trevor