Variation in Morphology and Kinematics Underlies Variation in Swimming Stability and Turning Performance in Freshwater Turtles

IF 2.2 4区 生物学 Q2 BIOLOGY
C. Mayerl, Jacob P. Youngblood, Gabriel Rivera, J. Vance, R. Blob
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引用次数: 6

Abstract

Among swimming animals, stable body designs often sacrifice performance in turning, and high turning performance may entail costs in stability. However, some rigid-bodied animals appear capable of both high stability and turning performance during swimming by propelling themselves with independently controlled structures that generate mutually opposing forces. Because such species have traditionally been studied in isolation, little is known about how variation within rigid-bodied designs might influence swimming performance. Turtles are a lineage of rigid-bodied animals, in which most species use contralateral limbs and mutually opposing forces to swim. We tested the stability and turning performance of two species of turtles, the pleurodire Emydura subglobosa and the cryptodire Chrysemys picta. Emydura subglobosa exhibited both greater stability and turning performance than C. picta, potentially through the use of subequally-sized (and larger) propulsive structures, faster limb movements, and decreased limb excursions. These data show how, within a given body design, combinations of different traits can serve as mechanisms to improve aspects of performance with competing functional demands.
形态学和运动学的变化是淡水龟游泳稳定性和转向性能变化的基础
在游泳动物中,稳定的身体设计往往会牺牲转弯性能,而高转弯性能可能会带来稳定性成本。然而,一些刚体动物在游泳过程中似乎具有高稳定性和转弯性能,它们通过独立控制的结构来推动自己,产生相互相反的力。由于这些物种传统上是单独研究的,所以人们对刚体设计的变化如何影响游泳性能知之甚少。海龟是一种刚体动物,其中大多数物种使用对侧四肢和相互相反的力量游泳。我们测试了两种海龟的稳定性和转弯性能,即胸膜龟和隐壳龟。与C. picta相比,亚球Emydura表现出更强的稳定性和转弯性能,这可能是由于它们使用了大小和更大的推进结构、更快的肢体运动和更少的肢体偏移。这些数据表明,在给定的身体设计中,不同特征的组合可以作为一种机制,以提高具有竞争功能需求的性能方面。
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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