Intermittent propulsion in largemouth bass, Micropterus salmoides , increases power production at low swimming speeds
Intermittent propulsion in largemouth bass, Micropterus salmoides , increases power production at low swimming speeds
复制标题
大口黑鲈（Micropterus salmoides）的间歇推进可提高低速游动时的发电量
DOI：
10.1098/rsbl.2021.0658
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发表时间：
2022
期刊：
影响因子：
3.3
通讯作者：
Ellerby, D. J.
中科院分区：
文献类型：
--
作者：
Coughlin, D. J.;Chrostek, J. D.;Ellerby, D. J.
运动支配着动物的能量预算，选择应该有利于最大限度地减少运输成本的行为。最近的野外工作改变了我们对鱼类运动方式的理解。例如，蓝鳃金龟采用可持续的间歇性游泳形式，2-3次尾拍与短滑行交替。在实验室中对蓝鳃鱼的意志游泳研究表明，推进阶段反映了身体尾鳍活动的固定齿轮约束。据报道，大口黑鲈（Micropterus salmoides）也会在野外间歇性游泳。我们研究了游泳低音在静态坦克量化的参数的意志运动，包括尾拍频率和滑行持续时间，在一个范围内的游泳速度。我们发现，尾拍频率是不相关的速度在较低的游泳速度。相反，速度是推进事件之间的滑翔持续时间的函数，滑翔持续时间随着速度的增加而减少。推进Strouhal数保持在最大化推进效率的范围内。我们使用肌肉力学实验来模拟间歇与稳定条件下肌肉操作的功率产生。Workloop的数据表明，间歇性活动可以让鱼有效地游泳，避免连续游泳的阻力引起的更大的能量消耗。研究结果为鱼类运动的新观点提供了支持：间歇性游泳对有氧游泳能量学至关重要。
Locomotion dominates animal energy budgets, and selection should favour behaviours that minimize transportation costs. Recent fieldwork has altered our understanding of the preferred modes of locomotion in fishes. For instance, bluegill employ a sustainable intermittent swimming form with 2–3 tail beats alternating with short glides. Volitional swimming studies in the laboratory with bluegill suggest that the propulsive phase reflects a fixed-gear constraint on body–caudal-fin activity. Largemouth bass (Micropterus salmoides) also reportedly display intermittent swimming in the field. We examined swimming by bass in a static tank to quantify the parameters of volitional locomotion, including tailbeat frequency and glide duration, across a range of swimming speeds. We found that tailbeat frequency was not related to speed at low swimming speeds. Instead, speed was a function of glide duration between propulsive events, with glide duration decreasing as speed increased. The propulsive Strouhal number remained within the range that maximizes propulsive efficiency. We used muscle mechanics experiments to simulate power production by muscle operating under intermittent versus steady conditions. Workloop data suggest that intermittent activity allows fish to swim efficiently and avoid the drag-induced greater energetic cost of continuous swimming. The results offer support for a new perspective on fish locomotion: intermittent swimming is crucial to aerobic swimming energetics.