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首页> 外文期刊>Biology Open >Three-dimensional movements of the pectoral fin during yaw turns in the Pacific spiny dogfish, Squalus suckleyi
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Three-dimensional movements of the pectoral fin during yaw turns in the Pacific spiny dogfish, Squalus suckleyi

机译：太平洋多刺dog鱼（Squalus suckleyi）在偏航转弯期间胸鳍的三维运动

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摘要

Fish pectoral fins move in complex ways, acting as control surfaces to affect force balance during swimming and maneuvering. Though objectively less dynamic than their actinopterygian relatives, shark pectoral fins undergo complex conformational changes and movements during maneuvering. Asynchronous pectoral fin movement is documented during yaw turning in at least two shark species but the three-dimensional (3D) rotation of the fin about the body axes is unknown. We quantify the 3D actuation of the pectoral fin base relative to the body axes. We hypothesized that Pacific spiny dogfish rotate pectoral fins with three degrees of freedom relative to the body during volitional turning. The pectoral fin on the inside of the turn is consistently protracted, supinated and depressed. Additionally, turning angular velocity increased with increasing fin rotation. Estimated drag on the fin increased and the shark decelerated during turning. Based on these findings, we propose that Pacific spiny dogfish uses drag-based turning during volitional swimming. Post-mortem muscle stimulation revealed depression, protraction and supination of the pectoral fin through stimulation of the ventral and cranial pterygoideus muscles. These data confirm functional hypotheses about pectoral fin musculature and suggest that Pacific spiny dogfish actively rotate pectoral fins to facilitate drag-based turning.This article has an associated First Person interview with the first author of the paper.
机译：鱼胸鳍以复杂的方式运动，充当控制面，影响游泳和操纵过程中的力量平衡。尽管客观上不如它们的放线翅目亲戚动态，但鲨鱼胸鳍在操纵过程中会经历复杂的构象变化和运动。在至少两个鲨鱼物种的偏航转向过程中，记录了异步胸鳍运动，但该鳍绕体轴的三维（3D）旋转是未知的。我们量化相对于身体轴线的胸鳍基部的3D驱动。我们假设太平洋多刺dog鱼在自愿转弯时相对于身体以三个自由度旋转胸鳍。转弯内侧的胸鳍始终拉长，俯仰和压低。另外，转动角速度随着鳍片旋转的增加而增加。估计鳍上的阻力增加，而鲨鱼在转弯时减速。根据这些发现，我们建议太平洋多刺dog鱼在自愿游泳期间使用基于阻力的转向。验尸后的肌肉刺激显示，通过刺激腹侧和颅骨翼状muscle肉，胸鳍凹陷，伸出和旋后。这些数据证实了有关胸鳍肌肉组织的功能性假设，并表明太平洋多刺dog鱼积极旋转胸鳍以促进基于阻力的转向。本文对第一人进行了相关的第一人称采访。

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