Hearing ability decreases in ageing locusts

Shira D. Gordon, James F. C. Windmill

Research output: Contribution to journalArticle

Abstract

Insects display signs of ageing, despite their short lifespan. However, the limited studies on senescence emphasize longevity or reproduction. We focused on the hearing ability of ageing adult locusts, Schistocerca gregaria. Our results indicate that the youngest adults (2 weeks post-maturity) have a greater overall neurophysiological response to sound, especially for low frequencies (<10 kHz), as well as a shorter latency to this neural response. Interestingly, when measuring displacement of the tympanal membrane that the receptor neurons directly attach to, we found movement is not directly correlated with neural response. Therefore, we suggest the enhanced response in younger animals is due to the condition of their tissues (e.g. elasticity). Secondly, we found the sexes do not have the same responses, particularly at 4 weeks post-adult moult. We propose female reproductive condition reduces their ability to receive sounds. Overall our results indicate older animals, especially females, are less sensitive to sounds.
LanguageEnglish
Pages1990-1994
Number of pages5
JournalJournal of Experimental Biology
Volume218
Early online date5 May 2015
DOIs
Publication statusPublished - 1 Jul 2015

Fingerprint

Aptitude
Grasshoppers
locust
hearing
locusts
Hearing
Schistocerca gregaria
animal
Elasticity
young animals
molt
senescence
elasticity (mechanics)
young adults
elasticity
Reproduction
molting
Insects
Young Adult
neurons

Keywords

  • age
  • sound
  • insect
  • laser vibrometry
  • schistocerca gregaria
  • neurophysiology

Cite this

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Hearing ability decreases in ageing locusts. / Gordon, Shira D.; Windmill, James F. C.

In: Journal of Experimental Biology, Vol. 218, 01.07.2015, p. 1990-1994.

Research output: Contribution to journalArticle

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