Journal of Comparative Physiology A

, Volume 170, Issue 1, pp 13–21

Seismic signal transmission between burrows of the Cape mole-rat, Georychus capensis

  • Peter M. Narins
  • O. J. Reichman
  • Jennifer U. M. Jarvis
  • Edwin R. Lewis
Article

Summary

Both seismic and auditory signals were tested for their propagation characteristics in a field study of the Cape mole-rat (Georychus capensis), a subterranean rodent in the family Bathyergidae. This solitary animal is entirely fossorial and apparently communicates with its conspecifics by alternately drumming its hind legs on the burrow floor. Signal production in this species is sexually dimorphic, and mate attraction is likely mediated primarily by seismic signalling between individuals in neighboring burrows. Measurements within, and at various distances away from, natural burrows suggest that seismic signals propagate at least an order of magnitude better than auditory signals. Moreover, using a mechanical thumper which could be triggered from a tape recording of the mole-rat's seismic signals, we established that the vertically-polarized surface wave (Rayleigh wave) propagates with less attenuation than either of the two horizontally-polarized waves. Thus, we tentatively hypothesize that Rayleigh waves subserve intraspecific communication in this species.

Key words

Seismic signals Mole-rat Communication Footdrumming Georychus 

Abbreviations

PPM

pulses per min

SB

simulated burrow

SD

standard deviation

SPL

sound pressure level

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Copyright information

© Springer-Verlag 1992

Authors and Affiliations

  • Peter M. Narins
    • 1
  • O. J. Reichman
    • 2
  • Jennifer U. M. Jarvis
    • 3
  • Edwin R. Lewis
    • 4
  1. 1.Department of BiologyUniversity of CaliforniaLos AngelesUSA
  2. 2.Division of BiologyKansas State UniversityManhattanUSA
  3. 3.Zoology DepartmentUniversity of Cape TownRondeboschSouth Africa
  4. 4.Department of Electrical Engineering and Computer SciencesUniversity of CaliforniaBerkeleyUSA

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