Responses of Torus Semicircularis Cells of the Coqui Treefrog to FM Sinusoids

  • Peter M. Narins
Part of the NATO Advanced Science Institutes Series book series (NSSA, volume 56)


The Puerto Rican treefrog, Eleutherodactylus coqui, is a nocturnal, arboreal amphibian which is found in high densities in the Caribbean National Forest. The advertisement call of the male is made up of a sequence of two notes repeated every 3 to 4s: a constant-frequency (CF) “Co-note” of 1.1kHz lasting about 100ms followed by a more intense frequency-modulated (FM) “Qui-note” sweeping upward from 1.8 to 2.1kHz in 170ms (Narins and Capranica, 1976; Narins and Hurley, 1982). Eleutherodactylus portoricensis and E.antillensis are sympatric treefrog species with calls which resemble that of E.coqui in structure, but which differ in their note frequencies, durations and repetition rates. Behavioral studies with E.coqui have shown that the Co-note is used during male-male territorial interactions, whereas the Qui-note is attractive to females (Narins and Capranica, 1976; 1978) and may play a role in the aggressive response given by a male on a nest or retreat site (D. Townsend, pers. comm.). The function of the individual call notes of the advertisement calls of E.portoricensis and E.antillensis is unknown, but preliminary evidence suggests that the call plays a different role in these closely related species (P.M. Narins et al., in prep.).


Firing Pattern Tuning Curve Advertisement Call Leopard Frog Torus Semicircularis 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. Dowben, R.M., and Rose, J.E., 1953, A metal filled microelectrode. Science, 118:22–24.PubMedCrossRefGoogle Scholar
  2. Frishkopf, L.S., and Goldstein, M.H., Jr., 1963, Responses to acoustic stimuli from single units in the eighth nerve of the bullfrog. J. Acoust. Soc. Amer., 47:1538–1547.Google Scholar
  3. Fuzessery, Z.M., and Feng, A.S., 1982, Excitatory and inhibitory response properties of neurons in the torus semicircularis of the leopard frog (Rana p. pipiens), (in press).Google Scholar
  4. Liff, H., and Goldstein, M.H., Jr., 1970, Peripheral inhibition in auditory nerve fibers in the frog. J. Acoust. Soc. Amer., 47:1538–1547.CrossRefGoogle Scholar
  5. Narins, P.M., and Capranica, R.R., 1976, Sexual differences in the auditory system of the treefrog (Eleutherodactylus coqui). Science, 192:378–380.PubMedCrossRefGoogle Scholar
  6. Narins, P.M., and Capranica, R.R., 1978, Communicative significance of the two-note call of the treefrog (Eleutherodactylus coqui). J. Comp. Physiol., 127:1–9.CrossRefGoogle Scholar
  7. Narins, P.M., and Capranica, R.R., 1980, Neural adaptations for processing the two-note call of the Puerto Rican treefrog (Eleutherodactylus coqui). Brain, Behav. Evol., 17:48–66.CrossRefGoogle Scholar
  8. Narins, P.M., and Hurley, D.D., 1982, The relationship between call intensity and function in the Puerto Rican coqui (Anura: Leptodactylidae). Herpetologica, (in press).Google Scholar
  9. Walkowiak, W., 1980, The coding of auditory signals in the torus semicircularis of the fire-bellied toad and the grass frog: Responses to simple stimuli and to conspecific calls, J. Comp. Physiol., 138:141–148.CrossRefGoogle Scholar

Copyright information

© Plenum Press, New York 1983

Authors and Affiliations

  • Peter M. Narins
    • 1
  1. 1.Department of BiologyUniversity of California at Los AngelesLos AngelesUSA

Personalised recommendations