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Journal of Comparative Physiology A

, Volume 173, Issue 3, pp 309–319 | Cite as

Vibratory communication in spiders

II. Representation of parameters contained in synthetic male courtship signals by female vibration receptor
  • D. Baurecht
  • F. G. Barth
Article

Abstract

We analyzed the response of the vibration sensitive lyriform organ on the metatarsus of female spiders (Cupiennius salei) to dummies of male courtship vibrations. One of the two representative slits studied is sharply tuned to 500 Hz. Only the other slit is sensitive enough at lower frequencies to represent the parameters contained in the behaviourally effective dummies:

  1. 1.

    Amplitude. The physiological threshold is similar to the behavioural threshold. The stimulus acceleration amplitudes leading to a good synchronization between response and temporal stimulus pattern coincide with those effectively eliciting a behavioural response. The most frequent spike intervals remain nearly constant in this range. At acceleration amplitudes above the natural range, syllable and pause durations are misrepresented by the receptor response.

     
  2. 2.

    Frequency. Varying the carrier frequency between 35–500 Hz changes the most frequent spike intervals. Interval histograms resulting from behaviourally effective stimuli (50–200 Hz), however, are similr for carrier frequencies differing by a factor of 2.

     
  3. 3.

    Temporal pattern. Response duration reflects the temporal parameters of the stimulus. The most frequent spike interval only changes with temporal stimulus characteristics far off the natural range. The number of spikes during a syllable decreases in ongoing stimulus series. The quality of copying the temporal stimulus pattern remains unchanged, however.

     

Key words

Vibratory communication Spider Mechanoreception Sensory representation Pattern recognition 

Abbreviations

AA

acceleration amplitude

CF

carrier frequency

DC

duty cycle

MO

metatarsal lyriform organ

ns

number of spikes elicited during one syllable

PD

pause duration

SC

synchronization coefficient

SD

syllable duration

T

sinewave period of stimulus

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References

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Copyright information

© Springer-Verlag 1993

Authors and Affiliations

  • D. Baurecht
    • 1
  • F. G. Barth
    • 1
  1. 1.Institut für Zoologie, Universität WienWienAustria

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