Whirligig beetle uses lift-based thrust for fastest insect swimming
Whirligig beetle uses lift-based thrust for fastest insect swimming
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旋转甲虫利用升力推力实现最快的昆虫游泳
DOI：
10.1016/j.cub.2023.11.008
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发表时间：
2024
期刊：
影响因子：
9.2
通讯作者：
Roh, Chris
中科院分区：
文献类型：
--
作者：
Sun, Yukun;Shields, Jena;Roh, Chris
旋转甲虫（Gyrinidae）是游得最快的昆虫。一厘米长的水生甲虫可以达到 100 m s–2 的峰值加速度和每秒 100 个身体长度的最高速度。先前的研究表明，后腿的阻力推力负责其推进1,2,3,4。然而，为了使基于阻力的推力有效，腿部划水速度必须超过游泳速度。因此，对于快速游动的旋转体，基于阻力的推力不太可能是加速度的主要来源5。在这里，我们证明基于升力的推力可以使旋转体快速游泳。
Whirligig beetles (Gyrinidae) are the fastest-swimming insects. The one-centimeter long aquatic beetle can reach a peak acceleration of 100 m s–2and a top velocity of 100 body lengths per second. Previous studies have suggested that drag-based thrust by their hind legs is responsible for their propulsion1,2,3,4. For the drag-based thrust to be effective, however, the leg stroke velocity must exceed the swimming velocity. Therefore, for fast-swimming whirligigs, it is unlikely that the drag-based thrust is the main source of acceleration5. Here, we demonstrate that lift-based thrust enables the rapid swimming of the whirligigs.