Hydrodynamic patterns from fast-starts in teleost fish and their possible relevance to predator–prey interactions
Hydrodynamic patterns from fast-starts in teleost fish and their possible relevance to predator–prey interactions
复制标题
硬骨鱼快速启动的水动力模式及其与捕食者-猎物相互作用的可能相关性
DOI：
10.1007/s00359-012-0775-5
复制
发表时间：
2013
期刊：
影响因子：
--
通讯作者：
W. Hanke
中科院分区：
文献类型：
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作者：
Benedikt Niesterok;W. Hanke
快速启动分布在广泛的鱼类系统发育范围内，并用于不同的目的，如攻击猎物或逃离捕食者。在这里，我们调查了42个快速启动的虹鳟鱼（虹鳟）引起的惊吓刺激。我们调查了逃跑的鱼留下的水运动的模式，以及它们作为依赖于水动力感觉系统的食鱼性捕食者的信息来源的可能价值。粒子图像测速仪（PIV）的测量结果显示，一个特定的流动结构，称为射流1，这是由尾翼产生的流动的时间延伸高达25.5分钟和空间延伸高达1.53米（外推）。射流2的持续时间和空间延伸，由身体产生的流动，平均较低，两个射流的大小不同。该鱼以大致平行于射流1和反平行于射流2的平均方向逃跑，范围远大于200°。这项研究量化了逃逸的鱼所产生的流动模式，并作为食鱼性捕食者将大大受益于能够分析这些流动模式，提供了线索的行为和生理调查的流体动力学感觉系统。
Fast-starts are distributed over a wide phylogenetic range of fish and are used for different purposes such as striking at prey or escaping from predators. Here we investigated 42 fast-starts of rainbow trouts (Oncorhynchus mykiss) elicited by a startle stimulus. We investigated the patterns of water movements left behind by the escaping fish and their possible value as a source of information to piscivorous predators that rely on hydrodynamic sensory systems. Particle image velocimetry (PIV) measurements revealed a temporal extension of up to 25.5 min and a spatial extension of up to 1.53 m (extrapolated) for a certain flow structure called jet 1, that is the flow produced by the tail fin. Duration and spatial extension of jet 2, the flow produced by the body, were on average lower, and both jets differed in size. The fish escaped in a mean direction approximately parallel to jet 1, and antiparallel to jet 2, with a range well above 200°. This study quantified the flow patterns generated by escaping fish and, as piscivorous predators would greatly benefit from being able to analyse these flow patterns, provides cues for the behavioural and physiological investigation of hydrodynamic sensory systems.