Scale effects and constraints for sound production in katydids (Orthoptera: Tettigoniidae): correlated evolution between morphology and signal parameters

Montealegre-z, F. (2009) Scale effects and constraints for sound production in katydids (Orthoptera: Tettigoniidae): correlated evolution between morphology and signal parameters. Journal of Evolutionary Biology, 22 (2). pp. 355-366. ISSN 1010-061X

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Full text URL: http://dx.doi.org/10.1111/j.1420-9101.2008.01652.x

Abstract

Male katydids (Orthoptera: Tettigoniidae) produce mating calls by rubbing the wings together, using specialized structures in their forewings (stridulatory file, scraper and mirror). A large proportion of species (ca. 66%) reported in the literature produces ultrasonic signals as principal output. Relationships among body size, generator structures and the acoustic parameters carrier frequency (fc) and pulse duration (pd), were studied in 58 tropical species that use pure-tone signals. A comparative analysis, based on the only available katydid phylogeny, shows how changes in sound generator form are related to changes in fc and pd. Anatomical changes of the sound generator that might have been selected via fc and pd are mirror size, file length and number of file teeth. Selection for structures of the stridulatory apparatus that enhance wing mechanics via file-teeth and scraper morphology was crucial in the evolution of ultrasonic signals in the family Tettigoniidae.

Item Type:Article
Keywords:acoustic communication, bioacoustics, comparative analysis, evolution of stridulation, scale effects, Tettigoniidae, ultrasounds
Subjects:C Biological Sciences > C990 Biological Sciences not elsewhere classified
C Biological Sciences > C182 Evolution
Divisions:College of Science > School of Life Sciences
ID Code:6473
Deposited By: Fernando Montealegre-Z
Deposited On:08 Oct 2012 21:20
Last Modified:18 Nov 2013 14:14

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