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Vocal tract shape variation contributes to individual vocal identity in African penguins.
Favaro, Livio; Zanoli, Anna; Ludynia, Katrin; Snyman, Albert; Carugati, Filippo; Friard, Olivier; Scaglione, Frine Eleonora; Manassero, Luca; Valazza, Alberto; Mathevon, Nicolas; Gamba, Marco; Reby, David.
Afiliación
  • Favaro L; ENES Bioacoustics Research Laboratory, CRNL, University of Saint-Etienne, CNRS, Inserm, Saint-Etienne, France.
  • Zanoli A; Department of Life Sciences and Systems Biology, University of Turin, Turin, Italy.
  • Ludynia K; Department of Life Sciences and Systems Biology, University of Turin, Turin, Italy.
  • Snyman A; Southern African Foundation for the Conservation of Coastal Birds (SANCCOB), Cape Town, South Africa.
  • Carugati F; Department of Biodiversity and Conservation Biology, University of the Western Cape, Bellville, South Africa.
  • Friard O; Southern African Foundation for the Conservation of Coastal Birds (SANCCOB), Cape Town, South Africa.
  • Scaglione FE; Department of Life Sciences and Systems Biology, University of Turin, Turin, Italy.
  • Manassero L; Department of Life Sciences and Systems Biology, University of Turin, Turin, Italy.
  • Valazza A; Department of Veterinary Science, University of Turin, Turin, Italy.
  • Mathevon N; Department of Veterinary Science, University of Turin, Turin, Italy.
  • Gamba M; Department of Veterinary Science, University of Turin, Turin, Italy.
  • Reby D; ENES Bioacoustics Research Laboratory, CRNL, University of Saint-Etienne, CNRS, Inserm, Saint-Etienne, France.
Proc Biol Sci ; 290(2008): 20231029, 2023 Oct 11.
Article en En | MEDLINE | ID: mdl-37817600
Variation in formant frequencies has been shown to affect social interactions and sexual competition in a range of avian species. Yet, the anatomical bases of this variation are poorly understood. Here, we investigated the morphological correlates of formants production in the vocal apparatus of African penguins. We modelled the geometry of the supra-syringeal vocal tract of 20 specimens to generate a population of virtual vocal tracts with varying dimensions. We then estimated the acoustic response of these virtual vocal tracts and extracted the centre frequency of the first four predicted formants. We demonstrate that: (i) variation in length and cross-sectional area of vocal tracts strongly affects the formant pattern, (ii) the tracheal region determines most of this variation, and (iii) the skeletal size of penguins does not correlate with the trachea length and consequently has relatively little effect on formants. We conclude that in African penguins, while the variation in vocal tract geometry generates variation in resonant frequencies supporting the discrimination of conspecifics, such variation does not provide information on the emitter's body size. Overall, our findings advance our understanding of the role of formant frequencies in bird vocal communication.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Spheniscidae Tipo de estudio: Prognostic_studies Límite: Animals Idioma: En Revista: Proc Biol Sci Asunto de la revista: BIOLOGIA Año: 2023 Tipo del documento: Article País de afiliación: Francia Pais de publicación: Reino Unido
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Spheniscidae Tipo de estudio: Prognostic_studies Límite: Animals Idioma: En Revista: Proc Biol Sci Asunto de la revista: BIOLOGIA Año: 2023 Tipo del documento: Article País de afiliación: Francia Pais de publicación: Reino Unido