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Inferring cost of transport from whole-body kinematics in three sympatric turtle species with different locomotor habits.
Comparative Biochemistry and Physiology A: Molecular & Integrative Physiology ( IF 2.1 ) Pub Date : 2020-05-22 , DOI: 10.1016/j.cbpa.2020.110739
William I Sellers 1 , Kayleigh A R Rose 2 , Dane A Crossley 3 , Jonathan R Codd 4
Affiliation  

Chelonians are mechanically unusual vertebrates as an exoskeleton limits their body wall mobility. They generally move slowly on land and have aquatic or semi-aquatic lifestyles. Somewhat surprisingly, the limited experimental work that has been done suggests that their energetic costs of transport (CoT) are relatively low. This study examines the mechanical evidence for CoT in three turtle species that have differing degrees of terrestrial activity. Our results show that Apolone travels faster than the other two species, and that Chelydra has higher levels of yaw. All the species show poor mean levels of energy recovery, and, whilst there is considerable variation, never show the high levels of energy recovery seen in cursorial quadrupeds. The mean mechanical CoT is 2 to 4 times higher than is generally seen in terrestrial animals. We therefore find no mechanical support for a low CoT in these species. This study illustrates the need for research on a wider range of chelonians to discover whether there are indeed general trends in mechanical and metabolic energy costs.

中文翻译:

从三种运动习惯不同的同伴龟类动物的全身运动学推断运输成本。

由于外骨骼限制了它们的体壁活动性,因此,Chelonians是机械上不常见的脊椎动物。它们通常在陆地上缓慢移动并具有水生或半水生生活方式。令人惊讶的是,已完成的有限的实验工作表明,其高能运输成本(CoT)相对较低。这项研究检查了三种具有不同陆地活动程度的海龟物种中CoT的力学证据。我们的结果表明,Apolone的行进速度比其他两个物种快,而Chelydra的偏航水平更高。所有物种均显示出较差的平均能量回收水平,尽管变化很大,但从未显示出四边形四边形所见的高水平能量回收。平均机械CoT比陆生动物中的平均CoT高2至4倍。因此,我们找不到这些物种中低CoT的机械支持。这项研究表明有必要对更广泛的凯隆人进行研究,以发现机械和代谢能的成本是否确实存在总体趋势。
更新日期:2020-05-22
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