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Behavioral Ecology and Sociobiology

, Volume 43, Issue 1, pp 59–66 | Cite as

Mechanisms of selective attention in grasshopper choruses: who listens to whom?

  • W. Andy Snedden
  • Michael D. Greenfield
  • Yikweon Jang
Original article

Abstract

In many rhythmically signaling species of acoustic insects and anurans, males form choruses at typical population densities. Recent findings that females may prefer leading calls indicate that the timing of a male's signals relative to those of neighboring choruses is an important component of mate attraction. Within a chorus, however, males cannot time their calls such that they lead all neighbors. Hence, they are expected to show selective attention toward only a subset of the group. We used field playback experiments to determine the incidence of and mechanism(s) responsible for selective attention in choruses of the territorial grasshoppers Ligurotettix coquilletti and L. planum. Our data revealed significant selective attention in both species and are inconsistent with either fixed-threshold or fixed-number mechanisms. Rather, regulation of selective attention by a sliding-threshold mechanism is supported. We discuss these results in the context of the evolution of chorus structure.

Key words Selective attention Sexual selection Chorusing 

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Copyright information

© Springer-Verlag Berlin Heidelberg 1998

Authors and Affiliations

  • W. Andy Snedden
    • 1
  • Michael D. Greenfield
    • 1
  • Yikweon Jang
    • 1
  1. 1.Department of Entomology, Haworth Hall, University of Kansas, Lawrence, KS 66045, USA e-mail: was@kuhub.cc.ukans.edu, Fax: +1-785-8645321US

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