Medium compensation in a spring-actuated system

Feller, K.D., Sutton, Gregory and Gonzalez-Bedillo, P.D. (2020) Medium compensation in a spring-actuated system. Journal of Experimental Biology, 223 . ISSN 0022-0949

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Medium compensation in a spring-actuated system
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Mantis shrimp strikes are one of the fastest animal movements, despite the fact they occur in a water medium with viscous drag. Since the strike is produced by a latch-mediated spring-actuated system and is not directly driven by muscle action, we predicted that strikes performed in air would be faster than underwater due to the reduction in the medium’s drag. Using high-speed video analysis of stereotyped strikes elicited from Squilla mantis, we found the exact opposite: strikes are much slower and less powerful in air than in water. S. mantis strikes in air have a similar mass and performance to latch-mediated spring-actuated jumps in locusts, suggesting a potential threshold for the energetics of a 1-2 g limb moving in air. Drag forces induced by the media may be a key feature in the evolution of mantis shrimp strikes and provide a potential target for probing the braking system of these extremely fast movements.

Keywords:elastic, biomechanics, mantis shrimp
Subjects:C Biological Sciences > C300 Zoology
B Subjects allied to Medicine > B830 Biomechanics, Biomaterials and Prosthetics (non-clinical)
C Biological Sciences > C100 Biology
Divisions:College of Science > School of Life Sciences
ID Code:40075
Deposited On:11 Mar 2020 16:33

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