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Evolutionary diversification of the auditory organ sensilla in Neoconocephalus katydids (Orthoptera: Tettigoniidae) correlates with acoustic signal diversification over phylogenetic relatedness and life history.

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Specific differences in sound production and pattern recognition in tettigoniids.

M Jatho1, J Schul, O Stiedl

  • 1AG Neurobiologie, FB Biologie-Zoologie, Philipps-Universität, 35032 Marburg, FRG.

Behavioural Processes
|June 14, 2014
PubMed
Summary

This study characterizes tettigoniid (katydid) songs using four parameters. The impulse pattern of closing syllables guides Ephippiger ephippiger, while syllable patterns are key for Tettigonia viridissima species recognition.

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Area of Science:

  • Bioacoustics
  • Animal Behavior
  • Insect Communication

Background:

  • Tettigoniid (katydid) stridulatory songs exhibit species-specific temporal patterns.
  • Understanding these acoustic signals is crucial for insect communication and reproductive success.

Purpose of the Study:

  • To introduce a set of four parameters for characterizing tettigoniid song temporal patterns.
  • To investigate the role of specific song parameters in female phonotaxis for two tettigoniid species.

Main Methods:

  • Comparative analysis of stridulatory songs from nine tettigoniid species.
  • Two-choice phonotaxis experiments with Ephippiger ephippiger and Tettigonia viridissima females.

Main Results:

  • Four parameters (phase, repetition mode, similarity, impulse pattern) were defined for song characterization.
  • Ephippiger ephippiger females used the impulse pattern of closing syllables for phonotaxis.
  • Tettigonia viridissima females relied on syllable patterns for species discrimination.

Conclusions:

  • The impulse pattern of closing syllables is critical for Ephippiger ephippiger's phonotactic behavior.
  • Syllable patterns serve as a decisive factor for species recognition in Tettigonia viridissima.
  • Temporal song parameters play distinct roles in mate choice and species recognition within tettigoniids.