Relevant bibliographies by topics / Locust hind wings

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  1. Journal articles
  2. Dissertations / Theses

Academic literature on the topic 'Locust hind wings'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Locust hind wings"

1

Wootton, R. J., K. E. Evans, R. Herbert, and C. W. Smith. "The hind wing of the desert locust (Schistocerca gregaria Forskal). I. Functional morphology and mode of operation." Journal of Experimental Biology 203, no. 19 (2000): 2921–31. http://dx.doi.org/10.1242/jeb.203.19.2921.

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Detailed morphological investigation, mechanical testing and high-speed cinematography and stroboscopic examination of desert locusts, Schistocerca gregaria, in flight show that their hind wings are adapted to deform cyclically and automatically through the wing stroke and that the deformations are subtly dependent on the wings' structure: their shape, venation and vein design and the local properties of the membrane. The insects predominantly fly fast forwards, generating most force on the downstroke, and the hind wings generate extra lift by peeling apart at the beginning of the downstroke a
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Smith, C. W., R. Herbert, R. J. Wootton, and K. E. Evans. "The hind wing of the desert locust (Schistocerca gregaria Forskal). II. Mechanical properties and functioning of the membrane." Journal of Experimental Biology 203, no. 19 (2000): 2933–43. http://dx.doi.org/10.1242/jeb.203.19.2933.

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As part of an investigation of the functional mechanics of the hind wing of the desert locust Schistocerca gregaria, the Young's modulus of the membrane was measured using a newly developed universal materials test machine capable of testing very small specimens of cuticle, down to 1 mm gauge length. Strain was measured optically. Specimens were cut from various locations around the wing and tested under controlled temperature and humidity. The modulus of the membrane was typically between 1 and 5 GPa, but both this and the membrane thickness varied around the wing, with the remigium and the a
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Faisal, A. A., and T. Matheson. "Coordinated righting behaviour in locusts." Journal of Experimental Biology 204, no. 4 (2001): 637–48. http://dx.doi.org/10.1242/jeb.204.4.637.

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A locust placed upside down on a flat surface uses a predictable sequence of leg movements to right itself. To analyse this behaviour, we made use of a naturally occurring state of quiescence (thanatosis) to position locusts in a standardised upside-down position from which they spontaneously right themselves. Locusts grasped around the pronotum enter a state of thanatosis during which the limbs can be manipulated into particular postures, where they remain, and the animal can be placed upside down on the ground. When released, thanatosis lasts 4–456 s (mean 73 s) before the animal suddenly be
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Maeno, K., T. Gotoh, and S. Tanaka. "Phase-related morphological changes induced by [His7]-corazonin in two species of locusts, Schistocerca gregaria and Locusta migratoria (Orthoptera: Acrididae)." Bulletin of Entomological Research 94, no. 4 (2004): 349–57. http://dx.doi.org/10.1079/ber2004310.

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AbstractThe effects of a neurohormone, [His7]-corazonin, on phase-related morphological traits (F/C and E/F ratios; F = length of the hind femur, C = maximum width of the head; E = length of fore wing) were re-examined in the desert locust, Schistocerca gregaria Forskål. The F/C ratio was significantly different between adults with five and six nymphal instars, respectively, indicating that they need to be analysed separately. Injections of the synthesized peptide (1 nmol) into individually-reared (solitary) nymphs at the second and third instars caused a shift in classical morphometric ratio
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Herbert, R. C., P. G. Young, C. W. Smith, R. J. Wootton, and K. E. Evans. "The hind wing of the desert locust (Schistocerca gregaria Forskal). III. A finite element analysis of a deployable structure." Journal of Experimental Biology 203, no. 19 (2000): 2945–55. http://dx.doi.org/10.1242/jeb.203.19.2945.

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Finite element analysis is used to model the automatic cambering of the locust hind wing during promotion: the umbrella effect. It was found that the model required a high degree of sophistication before replicating the deformations found in vivo. The model has been validated using experimental data and the deformations recorded both in vivo and ex vivo. It predicts that even slight modifications to the geometrical description used can lead to significant changes in the deformations observed in the anal fan. The model agrees with experimental data and produces deformations very close to those
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6

Wolf, H., and K. G. Pearson. "Proprioceptive input patterns elevator activity in the locust flight system." Journal of Neurophysiology 59, no. 6 (1988): 1831–53. http://dx.doi.org/10.1152/jn.1988.59.6.1831.

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1. In the locust, Locusta migratoria, the roles of two groups of wing sense organs, hind wing tegulae and wing-hinge stretch receptors, in the generation of the flight motor pattern were investigated. A preparation was employed that allowed the intracellular recording of neural activity in almost intact tethered flying locusts or after selective manipulations of sensory input. The functions of the two sets of receptors were assessed 1) by studying the phases of their discharges in the wingbeat cycle (Fig. 3), 2) by the selective ablation of input from the receptors (Figs. 4-7), and 3) by the s
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7

Gvirsman, Omer, Gabor Kosa, and Amir Ayali. "Dynamics and stability of directional jumps in the desert locust." PeerJ 4 (September 28, 2016): e2481. http://dx.doi.org/10.7717/peerj.2481.

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Locusts are known for their ability to jump large distances to avoid predation. The jump also serves to launch the adult locust into the air in order to initiate flight. Various aspects of this important behavior have been studied extensively, from muscle physiology and biomechanics, to the energy storage systems involved in powering the jump, and more. Less well understood are the mechanisms participating in control of the jump trajectory. Here we utilise video monitoring and careful analysis of experimental directional jumps by adult desert locusts, together with dynamic computer simulation,
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Wildman, M. "Connections between thoraco-coxal proprioceptive afferents and motor neurons in the locust." Journal of Experimental Biology 203, no. 3 (2000): 435–45. http://dx.doi.org/10.1242/jeb.203.3.435.

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The position of the coxal segment of the locust hind leg relative to the thorax is monitored by a variety of proprioceptors, including three chordotonal organs and a myochordotonal organ. The sensory neurons of two of these proprioceptors, the posterior joint chordotonal organ (pjCO) and the myochordotonal organ (MCO), have axons in the purely sensory metathoracic nerve 2C (N2C). The connections made by these afferents with metathoracic motor neurons innervating thoraco-coxal and wing muscles were investigated by electrical stimulation of N2C and by matching postsynaptic potentials in motor ne
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ROBERT, DANIEL. "The Auditory Behaviour of Flying Locusts." Journal of Experimental Biology 147, no. 1 (1989): 279–301. http://dx.doi.org/10.1242/jeb.147.1.279.

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The auditory behaviour of tethered locusts flying in a wind tunnel was investigated under controlled acoustic conditions. 1. Reflection, attenuation and diffraction of ultrasound evoked by the locust's physical presence caused pronounced distortions of the acoustic field. Interaural pressure variations were observed that account for directional hearing at high frequencies. 2. Sound field measurements indicated only a minor influence of flight posture or wing position on the interaural pressure gradient. 3. The locusts steered away from pulsed ultrasounds that simulated bat echolocation signals
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ROWELL, C. H. F. "Descending Interneurones of the Locust Reporting Deviation from Flight Course: What is their role in Steering?" Journal of Experimental Biology 146, no. 1 (1989): 177–94. http://dx.doi.org/10.1242/jeb.146.1.177.

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Some descending intemeurones (DNs) in insects encode deviation from flight course. Intracellular recording reveals their inputs (from eyes, wind hairs, proprioceptive information from the neck and in some cases ocelli). Intracellularstimulation during flight reveals their motor effects. All components of steering (modification of wing stroke, ruddering with the hind legs, ruddering with the abdomen and head rotation) can be initiated by single DNs. Steering in flight involves the concerted action of at least 10 pairs of DNs synapsing with motor neurones and premotor intemeurones. The whole sys
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Dissertations / Theses on the topic "Locust hind wings"

1

Herbert, Rolf China. "Modelling insect wings using the finite element method." Thesis, University of Exeter, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.370012.

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