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On the evolution of noise-dependent vocal plasticity in birds

Schuster, Sophie ; Zollinger, Sue Anne ; Lesku, John A. ; Brumm, Henrik

Biology letters (2005), 2012-12, Vol.8 (6), p.913-916 [Periódico revisado por pares]

England: The Royal Society

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Título:
On the evolution of noise-dependent vocal plasticity in birds
Autor: Schuster, Sophie ; Zollinger, Sue Anne ; Lesku, John A. ; Brumm, Henrik
Assuntos: Acoustic Communication ; Adaptation, Biological - physiology ; Animal Behaviour ; Animals ; Anura ; Aves ; Biological Evolution ; Eudromia elegans ; Female ; Lombard Effect ; Male ; Noise ; Palaeognathae - physiology ; Perceptual Masking - physiology ; Phenotypic Plasticity ; Pitch Perception - physiology ; Sex Factors ; Signal Masking ; Sound Spectrography ; Vocalization, Animal - physiology
É parte de: Biology letters (2005), 2012-12, Vol.8 (6), p.913-916
Notas: ark:/67375/V84-27KCDR9H-V
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Descrição: Signal plasticity is considered an important step in the evolution of animal communication. In acoustic communication, signal transmission is often constrained by background noise. One adaptation to evade acoustic signal masking is the Lombard effect, in which an animal increases its vocal amplitude in response to an increase in background noise. This form of signal plasticity has been found in mammals, including humans, and some birds, but not frogs. However, the evolution of the Lombard effect is still unclear. Here we demonstrate for the first time the Lombard effect in a phylogentically basal bird species, the tinamou Eudromia elegans. By doing so, we take a step towards reconstructing the evolutionary history of noise-dependent vocal plasticity in birds. Similar to humans, the tinamous also raised their vocal pitch in noise, irrespective of any release from signal masking. The occurrence of the Lombard effect in a basal bird group suggests that this form of vocal plasticity was present in the common ancestor of all living birds and thus evolved at least as early as 119 Ma.
Editor: England: The Royal Society
Idioma: Inglês

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On the evolution of noise-dependent vocal plasticity in birds

Schuster, Sophie ; Zollinger, Sue Anne ; Lesku, John A. ; Brumm, Henrik

England: The Royal Society

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