Time-correlated flights of juvenile and mature locusts: A comparison between free and tethered animals |
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Authors: | Wolfram Kutsch Paul Stevenson |
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Affiliation: | Fakultät für Biologie, Universität, 7750 Konstanz, W. Germany |
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Abstract: | The flights of free and tethered Locusta migratoria were followed from initiation with a high-speed film camera. A longer sequence of wing-beat cycles can thus be correlated unequivocally with the animals's movement in time and space. In both flight situations the locusts start with approximately the same instantaneous wing-beat frequency. During the early flight phase free-flying animals increase their wing-beat frequency, whereas for tethered locusts this parameter remains constant or even decreases. The general flight pattern is similar in juvenile and mature locusts; the juveniles however, fly with alower wing-beat frequency and flight speed. The differences in the wing-beat frequencies for both flight performances are discussed with respect to differences in the sensory inputs to the flight motor centre. |
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Keywords: | film analysis of free and tethered flights wing-beat frequency fligh speed |
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