Substrate Interactions and Free-Swimming Dynamics in the Crayfish Escape Response

IF 2.2 4区 生物学 Q2 BIOLOGY
Luis X de Pablo, Adrian Carleton, Yahya Modarres-Sadeghi, Ethan D Clotfelter
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引用次数: 0

Abstract

The caridoid or “tail flip” escape behavior of decapod crustaceans is a model system in neurobiology, but many aspects of its biomechanics are not well understood. To understand how the freshwater virile crayfish Faxonius virilis interacts with the substrate during the tail flip, we studied tail-flip hydrodynamics and force generation for free-moving animals standing on substrate, as well as tethered animals held at different distances from the substrate. We found no significant differences in force generation when distance from substrate was varied. Particle image velocimetry (PIV) revealed that vortex formation was similar at all distances, but there were notable differences in interactions between shed vortices and substrate at different distances. Negative vorticity (clockwise flow of water) was observed in tethered animals interacting with the substrate but was largely absent in free-swimming animals. We found no evidence of ground effects enhancing tail flip performance in either tethered or free-swimming individuals, as peak force generation occurred before vortex shedding. This study contributes to our understanding of the crayfish escape response and highlights the need for more work that incorporates free-swimming animals and complex environments in the study of crustacean biomechanics.
螯虾逃逸反应中的底质相互作用和自由游动动力学
十足类甲壳动物的胴体或 "翻尾 "逃逸行为是神经生物学的一个模型系统,但其生物力学的许多方面还不甚明了。为了了解淡水刚毛螯虾 Faxonius virilis 在翻尾过程中如何与底质相互作用,我们研究了站在底质上自由移动的动物以及与底质保持不同距离的系留动物的翻尾流体动力学和力的产生。我们发现,当与基底的距离不同时,产生的力没有明显差异。粒子图像测速仪(PIV)显示,漩涡的形成在所有距离上都相似,但在不同距离上,脱落的漩涡与基底之间的相互作用存在明显差异。在被拴住的动物与底层相互作用时,我们观察到了负涡度(水流顺时针方向),但在自由游动的动物身上则基本没有。我们没有发现地面效应能提高系留或自由游动个体的翻尾性能,因为产生的峰值力发生在涡流脱落之前。这项研究有助于我们了解小龙虾的逃逸反应,并强调了在甲壳类生物力学研究中结合自由游动动物和复杂环境开展更多工作的必要性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
3.70
自引率
6.70%
发文量
48
审稿时长
20 weeks
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