Jet-propulsion in anisopteran dragonfly larvae

@article{Mill2004JetpropulsionIA,
  title={Jet-propulsion in anisopteran dragonfly larvae},
  author={Peter J. Mill and Robert S. Pickard},
  journal={Journal of comparative physiology},
  year={2004},
  volume={97},
  pages={329-338}
}
SummaryJet-propulsion in dragonfly larvae is achieved by the rapid ejection of water from a specialised rectal chamber via the anus, at a frequency of up to 2.2 cycles/s. [] Key Result Forward thrusts of up to 1.5 g wt result from the expiratory phases of cycles lasting 0.1 to 0.4 s. Swimming velocities are in the order of 10 cm/s.
Ventilatory muscle activity in restrained and free-swimming dragonfly larvae (Odonata: Anisoptera)
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RDV activity is shown to be more variable in the free-swimming animal than recordings from dissected and restrained preparations previously suggested, and activity in theADV duringVn shows a reciprocal relationship with that in theRDV.
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The geometry of thelabial joints gives the primary flexor muscles of the labium a large mechanical advantage over theextensor muscles in the fully flexed labium, and allows the extensor muscles to contract almost isometrically.
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The synchronized dual-catapult system, a biomechanically novel mechanism for the ballistic movement of prey capturing in dragonfly larvae, is proposed and a bio-inspired robotic arm resembling the morphology and functional principle of the extensible mouthpart is developed.
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The mechanism of “gulping” ventilation in dragonfly larvae is discussed and movements of the abdominal exoskeleton, monitored by cine-photography, phototransistor and strain gauge, are discussed in relation to known muscular activity.
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This scallop robot provides a new propulsion mechanism in underwater bionic robots and is also of help to understand the swimming principle of scallops in terms of jet propulsion and clapping motion.
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TLDR
It is demonstrated that biomechanics can provide important insights into ecological processes – in this case, that flight performance is an important limiting factor for range expansions, where other limitations are perhaps not present.
A controllable dual-catapult system inspired by the biomechanics of the dragonfly larvae’s predatory strike
TLDR
A bioinspired robotic model resembling the morphology and functional principle of the extensible mouthpart found in dragonfly larvae can be used to control the extension direction and thrust vector of a power-modulated robotic system.
Respiratory nervous activity in the isolated nerve cord of the larval dragonfly, and location of the respiratory oscillator
TLDR
The results suggest that the last ganglion contains the main oscillator, but that other weak oscillators occur elsewhere.
The head morphology of Pyrrhosoma nymphula larvae (Odonata: Zygoptera) focusing on functional aspects of the mouthparts
TLDR
The main focus of the study herein, is to use detailed morphological descriptions of the mouthparts and their musculature as basis for hypothetic functional models of the odonatan mouthparts.
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