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Free, publicly-accessible full text available June 1, 2026
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Goode, Chloe K; Woodrow, Charlie; Harrison, Shannon L; Deeming, D Charles; Sutton, Gregory P (, Journal of Comparative Physiology B)Abstract The Orthoptera are a diverse insect order well known for their locomotive capabilities. To jump, the bush-cricket uses a muscle actuated (MA) system in which leg extension is actuated by contraction of the femoral muscles of the hind legs. In comparison, the locust uses a latch mediated spring actuated (LaMSA) system, in which leg extension is actuated by the recoil of spring-like structure in the femur. The aim of this study was to describe the jumping kinematics ofMecopoda elongata(Tettigoniidae) and compare this to existing data inSchistocerca gregaria(Acrididae), to determine differences in control of rotation during take-off between similarly sized MA and LaMSA jumpers. 269 jumps from 67 individuals ofM. elongatawith masses from 0.014 g to 3.01 g were recorded with a high-speed camera setup. InM. elongata, linear velocity increased with mass0.18and the angular velocity (pitch) decreased with mass−0.13. InS. gregaria, linear velocity is constant and angular velocity decreases with mass−0.24. Despite these differences in velocity scaling, the ratio of translational kinetic energy to rotational kinetic energy was similar for both species. On average, the energy distribution ofM. elongatawas distributed 98.8% to translational kinetic energy and 1.2% to rotational kinetic energy, whilst inS. gregariait is 98.7% and 1.3%, respectively. This energy distribution was independent of size for both species. Despite having two different jump actuation mechanisms, the ratio of translational and rotational kinetic energy formed during take-off is fixed across these distantly related orthopterans.more » « less
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