Journal of Comparative Physiology A

, Volume 202, Issue 5, pp 361–370

Difference between the vocalizations of two sister species of pigeons explained in dynamical terms

  • R. Gogui Alonso
  • Cecilia Kopuchian
  • Ana Amador
  • Maria de los Angeles Suarez
  • Pablo L. Tubaro
  • Gabriel B. Mindlin
Original Paper

DOI: 10.1007/s00359-016-1082-3

Cite this article as:
Alonso, R.G., Kopuchian, C., Amador, A. et al. J Comp Physiol A (2016) 202: 361. doi:10.1007/s00359-016-1082-3
  • 129 Downloads

Abstract

Vocal communication is an unique example, where the nonlinear nature of the periphery can give rise to complex sounds even when driven by simple neural instructions. In this work we studied the case of two close-related bird species, Patagioenasmaculosa and Patagioenaspicazuro, whose vocalizations differ only in the timbre. The temporal modulation of the fundamental frequency is similar in both cases, differing only in the existence of sidebands around the fundamental frequency in the P. maculosa. We tested the hypothesis that the qualitative difference between these vocalizations lies in the nonlinear nature of the syrinx. In particular, we propose that the roughness of maculosa’s vocalizations is due to an asymmetry between the right and left vibratory membranes, whose nonlinear dynamics generate the sound. To test the hypothesis, we generated a biomechanical model for vocal production with an asymmetric parameter Q with which we can control the level of asymmetry between these membranes. Using this model we generated synthetic vocalizations with the principal acoustic features of both species. In addition, we confirmed the anatomical predictions by making post mortem inspection of the syrinxes, showing that the species with tonal song (picazuro) has a more symmetrical pair of membranes compared to maculosa.

Keywords

Biomechanics Birdsong Asymmetry Vocal control Nonlinear dynamics 

Supplementary material

359_2016_1082_MOESM1_ESM.wav (375 kb)
Supplementary material 1 (WAV 374 kb)
359_2016_1082_MOESM2_ESM.wav (905 kb)
Supplementary material 2 (WAV 905 kb)
359_2016_1082_MOESM3_ESM.wav (431 kb)
Supplementary material 3 (WAV 430 kb)
359_2016_1082_MOESM4_ESM.wav (431 kb)
Supplementary material 4 (WAV 430 kb)

Copyright information

© Springer-Verlag Berlin Heidelberg 2016

Authors and Affiliations

  • R. Gogui Alonso
    • 1
  • Cecilia Kopuchian
    • 2
    • 3
  • Ana Amador
    • 1
  • Maria de los Angeles Suarez
    • 1
  • Pablo L. Tubaro
    • 2
  • Gabriel B. Mindlin
    • 1
  1. 1.Department of Physics, FCENUniversity of Buenos Aires and IFIBA, CONICETBuenos AiresArgentina
  2. 2.División OrnitologíaMuseo Argentino de Ciencias Naturales “Bernardino Rivadavia” (MACN - CONICET)Buenos AiresArgentina
  3. 3.Laboratorio de Biología de la ConservaciónCentro de Ecología Aplicada del Litoral (CECOAL - CONICET)CorrientesArgentina