Fine structure of the scolopidia in the johnston's organ of male Aedes aegypti (L.) (Diptera: Culicidae)

Boo, Kyung Saeng; Richards, A. Glenn

doi:10.1016/0020-7322(75)90031-8

Cited by 70 publications

(50 citation statements)

References 12 publications

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“…1). The characteristic attenuation that a dipole source produces is shown by the fitted curve, which depicts this dipole law of spatial attenuation A͞r 3 , with A ϭ 8,606 Ϯ 222 mm 4 ⅐s Ϫ1 . The flight frequency was also determined from these recordings as a function of time.…”

Section: Resultsmentioning

confidence: 99%

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Nonlinear auditory mechanism enhances female sounds for male mosquitoes

Jackson

Robert²

2006

Proc. Natl. Acad. Sci. U.S.A.

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Sound plays an important role in the life history of mosquitoes. Male mosquitoes detect females by the sound generated by their wingbeat. Because female wings are weak acoustic radiators, males have been driven by sexual selection to evolve sensitive acoustic sensors. Mosquito antennae are very sensitive acoustic receivers, featuring up to 16,000 sensory cells, a number comparable with that contained in the human cochlea. The antennal sound receiver exhibits frequency selectivity, input amplification, and self-generated oscillations, features that parallel the functional sophistication of the cochlear amplifier. Although arguably the male antenna is well suited to receiving weak female sounds, the role of active mechanisms in mosquito hearing is far from understood. Previous mechanical studies on mosquito hearing largely focused on the steady-state antennal response to harmonic sounds, mostly evaluating the data through conventional Fourier transforms. Here, we report on the time-resolved mechanical behavior of the male antenna in response to female sounds. Crucially, stimuli were designed to reflect the temporal acoustic profile of a female flying by. With these stimuli, several previously unreported nonlinear features were unveiled, involving amplification, compression, and hysteresis. The time-resolved analysis reveals that, through the active participation of the sensory neurons, the antenna mechanically responds to enlarge its own range of detection. This behavior augments the capacity of the antennal receiver to detect female sounds, enhancing the male's chance to successfully pursue a passing female.active audition ͉ hearing ͉ nonlinear oscillator ͉ phonotaxis ͉ signal amplification

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Section: Resultsmentioning

confidence: 99%

“…In mosquitoes, this organ has evolved to be larger and more complex than in other insects (3) and comprises up to 16,000 sensory cells (4), just as many as in the human cochlea (5). As part of the mating behavior, male mosquitoes locate conspecific females by detecting the particle velocity component of the sound produced by their beating wings (3,(6)(7)(8).…”

mentioning

confidence: 99%

Nonlinear auditory mechanism enhances female sounds for male mosquitoes

Jackson

Robert²

2006

Proc. Natl. Acad. Sci. U.S.A.

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“…This organ contains many mechanosensory units called scolopidia comprising ciliated neurons (e.g. Boo & Richards, 1975). Cilia within these scolopidia are thought to be capable of generating force, thus providing an origin for energy pumping into the oscillating ear.…”

Section: Antennal Earsmentioning

confidence: 99%

Mechanical Specializations of Insect Ears

Windmill¹,

Jackson²

2016

Springer Handbook of Auditory Research

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In this chapter some of the mechanical specializations that insects have evolved to carry out acoustic sensory tasks are reviewed. Although it is easy to perceive insect hearing organs as simplistic compared to other animals, the mechanisms involved can be complex. This chapter therefore acts as an introduction to the complexities of some insect hearing systems, as viewed from a mechanical perspective. The chapter provides some of the background knowledge readers require to investigate the subject in greater depth, while acknowledging that this subject is an active, developing, and broad area of research. Following a brief background section on the physics of sound as applied to the insect ear, the mechanical

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“…In insects such as mosquitoes, auditory function can be even more highly elaborated, as evidenced in several ways. First, numbers of scolopidia are very high-over 7000 in male Aedes aegypti-resulting in auditory organs as prominent as the eyes Richards, 1975a, Boo andRichards, 1975b). Secondly, the morphological diversity appears greater, with as many as four clear morphological types Richards, 1975a, Boo andRichards, 1975b).…”

Section: Comparative Analysis Of Drosophila Chordotonal Organ Morpholmentioning

confidence: 99%

Development of Johnston's organ in Drosophila

Eberl¹,

Boekhoff-Falk²

2007

Int. J. Dev. Biol.

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Hearing is a specialized mechanosensory modality that is refined during evolution to meet the particular requirements of different organisms. In the fruitfly, Drosophila, hearing is mediated by Johnston's organ, a large chordotonal organ in the antenna that is exquisitely sensitive to the near-field acoustic signal of courtship songs generated by male wing vibration. We summarize recent progress in understanding the molecular genetic determinants of Johnston's organ development and discuss surprising differences from other chordotonal organs that likely facilitate hearing. We outline novel discoveries of active processes that generate motion of the antenna for acute sensitivity to the stimulus. Finally, we discuss further research directions that would probe remaining questions in understanding Johnston's organ development, function and evolution.

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Fine structure of the scolopidia in the johnston's organ of male Aedes aegypti (L.) (Diptera: Culicidae)

Cited by 70 publications

References 12 publications

Nonlinear auditory mechanism enhances female sounds for male mosquitoes

Nonlinear auditory mechanism enhances female sounds for male mosquitoes

Mechanical Specializations of Insect Ears

Development of Johnston's organ in Drosophila

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