School of Biomedical Sciences, The University of Queensland, St. Lucia, Queensland, Australia.
PLoS One. 2012;7(2):e32295. doi: 10.1371/journal.pone.0032295. Epub 2012 Feb 16.
Larval zebrafish innately perform a suite of behaviors that are tightly linked to their evolutionary past, notably escape from threatening stimuli and pursuit and capture of prey. These behaviors have been carefully examined in the past, but mostly with regard to the movements of the trunk and tail of the larvae. Here, we employ kinematics analyses to describe the movements of the pectoral fins during escape and predatory behavior. In accord with previous studies, we find roles for the pectoral fins in slow swimming and immediately after striking prey. We find novel roles for the pectoral fins in long-latency, but not in short-latency C-bends. We also observe fin movements that occur during orienting J-turns and S-starts that drive high-velocity predatory strikes. Finally, we find that the use of pectoral fins following a predatory strike is scaled to the velocity of the strike, supporting a role for the fins in braking. The implications of these results for central control of coordinated movements are discussed, and we hope that these results will provide baselines for future analyses of cross-body coordination using mutants, morphants, and transgenic approaches.
幼虫斑马鱼天生具有一系列与进化史密切相关的行为，特别是逃避威胁刺激以及追逐和捕获猎物。这些行为过去曾被仔细研究过，但大多是针对幼虫的躯干和尾巴的运动。在这里，我们采用运动学分析来描述逃避和捕食行为中胸鳍的运动。与先前的研究一致，我们发现胸鳍在缓慢游动和撞击猎物后立即发挥作用。我们发现了胸鳍在长潜伏期而非短潜伏期 C 形弯曲中的新作用。我们还观察到在定向 J 转弯和 S 开始期间发生的鳍部运动，这些运动可实现高速捕食攻击。最后，我们发现捕食攻击后使用胸鳍的方式与攻击速度成比例，这支持了鳍在制动中的作用。讨论了这些结果对协调运动的中枢控制的影响，我们希望这些结果将为使用突变体、形态发生缺陷体和转基因方法进行跨体协调的未来分析提供基准。
