Kinematics of jumping in leafhopper insects (Hemiptera, Auchenorrhyncha, Cicadellidae).

Kinematics of jumping in leafhopper insects (Hemiptera, Auchenorrhyncha, Cicadellidae). Research Abstract Details 

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Kinematics of jumping in leafhopper insects (Hemiptera, Auchenorrhyncha, Cicadellidae). Abstract Text:

Malcolm Burrows,Malcolm Burrows,Malcolm Burrows,Malcolm Burrows,

The jumping movements and performance of leafhopper insects (Hemiptera, Auchenorrhyncha, Cicadellidae) were analysed from high-speed sequences of images captured at rates up to 5000 frames s(-1). The propulsion for a jump was delivered by rapid and synchronous movements of the hind legs that are twice the length of the other legs, almost as long as the body, and represent 3.8% of the body mass. The wings were not moved before take-off, but the jump frequently launched a flight. The front and middle legs set the attitude of the body in preparation for a jump but were usually raised from the ground before take-off. The movements of the hind legs occurred in three distinct phases. First, a levation phase of 15-30 ms, in which both hind legs were moved forward and medially so that they were positioned directly beneath the body with their tibio-tarsal joints pressed against each other. Second, a holding phase lasting 10-200 ms, in which the hind legs remained stationary in the fully levated position. Third, a rapid jump phase, in which both hind legs were simultaneously depressed about their coxo-trochanteral joints and extended at their femoro-tibial joints. This phase lasted 5-6 ms on average, with the fastest movements accomplished in 2.75 ms and involving rotations of the coxo-trochanteral joints of 44,000 deg. s(-1). In the best jumps by Aphrodes, a peak take-off velocity of 2.9 m s(-1) was achieved by an acceleration of 1055 m s(-2), equivalent to 108 times gravity. This jumping performance required an energy output of 77 microJ, a power output of 28 mW and exerted a force of 19 mN, or 100 times its body mass.

Kinematics of jumping in leafhopper insects (Hemiptera, Auchenorrhyncha, Cicadellidae). Publishing Authors By Initials

M Burrows,M Burrows,M Burrows,M Burrows,

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Kinematics of jumping in leafhopper insects (Hemiptera, Auchenorrhyncha, Cicadellidae). Journal Published:

PUBLICATION TYPE: Journal Article

Journal: The Journal of experimental biology

VOLUME: 210

Page Numbers: 3579-89

Journal Abbreviation: J. Exp. Biol.

ISSN: 0022-0949

DAY: 8

MONTH: Oct

YEAR: 2007

Kinematics of jumping in leafhopper insects (Hemiptera, Auchenorrhyncha, Cicadellidae). Information

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LANGUAGE: eng

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Grant and Affiliation Information for Kinematics of jumping in leafhopper insects (Hemiptera, Auchenorrhyncha, Cicadellidae).

AFFILIATION: Department of Zoology, University of Cambridge, Cambridge CB2 3EJ, UK. mb135@hermes.cam.ac.uk

Country: England

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MEDLINETA: J Exp Biol

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