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Mechanically coupled ears for directional hearing in the parasitoid fly Ormia ochracea.
An analytical model of the mechanical response of the ear to a sound stimulus is proposed which supports the claim that mechanical interaural coupling is the key to this animal's ability to localize sound sources. Expand
Effects of a tachinid parasitoid, Ormia ochracea, on the behaviour and reproduction of its male and female field cricket hosts (Gryllus spp)
After the larvae of the tachinid parasitoid fly entered the abdominal cavity, the host's mating, egg-laying and fighting ability (males) declined, probably due to the tissue damage wrought by the parasitoids. Expand
The role of neurohormonal octopamine during 'fight or flight' behaviour in the field cricket Gryllus bimaculatus.
Octopamine has been called the 'fight or flight' hormone of insects. We tested this hypothesis by measuring octopamine levels in the haemolymph of field crickets after fighting, flying, courting andExpand
Harmonic Convergence in the Love Songs of the Dengue Vector Mosquito
Physiological recordings from Johnston's organ (the mosquito's “ear”) reveal sensitivity up to 2000 hertz, consistent with the observed courtship behavior, and revise widely accepted limits of acoustic behavior in mosquitoes. Expand
The response of an insect parasitoid, Ormia ochracea (Tachinidae), to the uncertainty of larval success during infestation
Even though the success rate for larvae laid during the second mode of larviposition was low, the possibility of parasitizing more hosts appears to have selected for flies laying more larvae than is optimal if all the larvae successfully entered a single host. Expand
Agonistic behaviour in male and female field crickets, Gryllus bimaculatus, and how behavioural context influences its expression
Previous interactions with conspecifics influenced the pattern, frequency and intensity of agonistic behaviour in the field cricket Gryllus bimaculatus. Tactile contact appeared to be the mostExpand
Initiation of behavior by single neurons: the role of behavioral context.
Electrical stimulation of a single, identified sensory interneuron (Int-1) elicits avoidance steering; depressing its response to ultrasound abolishes avoidance steering and the sufficiency of Int-1 for eliciting this behavior is contingent on behavioral context. Expand
Hyperacute directional hearing in a microscale auditory system
It is reported that O. ochracea can behaviourally localize a salient sound source with a precision equal to that of humans, and in the fly itself this performance is dependent on a newly discovered set of specific coding strategies employed by the nervous system. Expand
The sounds of silence: cessation of singing and song pausing are ultrasound-induced acoustic startle behaviors in the katydid Neoconocephalus ensiger (Orthoptera; Tettigoniidae)
  • P. Faure, R. Hoy
  • Psychology, Medicine
  • Journal of Comparative Physiology A
  • 1 February 2000
An acoustic startle response of the nocturnal katydid, Neoconocephalus ensiger, is described, finding that cessation of singing and song pausing are ultrasound-specific behaviors: when stimulated with pulsed ultrasound, but not audio-sound (<20 kHz), males cease mate calling or insert pauses in their song. Expand
Neuroethology of the katydid T-cell. I. Tuning and responses to pure tones.
  • P. Faure, R. Hoy
  • Biology, Medicine
  • The Journal of experimental biology
  • 1 November 2000
The tuning and pure-tone physiology of the T-cell prothoracic auditory interneuron were investigated in the nocturnal katydid Neoconocephalus ensiger and revealed that temporal pattern-copying was superior for ultrasonic stimulation. Expand