Variation among vocalizations of Taraba major (Aves: Thamnophilidae) subspecies

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Data

2018-01-01

Autores

Sementili-Cardoso, Guilherme [UNESP]
Rodrigues, Fernanda Goncalves [UNESP]
Martins, Rafael Martos [UNESP]
Gerotti, Raphael Whitacker [UNESP]
Vianna, Renata Marques [UNESP]
Donatelli, Reginaldo Jose [UNESP]

Título da Revista

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Editor

Taylor & Francis Ltd

Resumo

Geographical variation of bird vocalizations may be related to factors influencing sound production and sound propagation. If birds, e.g. the Great Antshrike (Taraba major), produce vocalizations that develop normally in the absence of learning, these variations may reflect evolutionary divergence within species. In this case, vocal variation could be influenced by habitat structure, since abiotic features and vegetal cover affect sound propagation through environment. Selective pressures may be acting on populations in different ways, which could culminate in a process of speciation. Thus, we searched for structural variation of Great Antshrike vocalizations between subspecies and sought for relationships between these vocal variation and environmental structure. We found variations in frequency and time features of vocalizations among subspecies, which are correlated to latitude, elevation and climate. We also observed an increase in vocal differences along with an increase in distances between individuals, which could reflect isolation of subspecies and the vocal adaptation to different environments.

Descrição

Palavras-chave

Suboscine, isolation-by-distance, vocal variation, bioacoustics, acoustic adaptation

Como citar

Studies On Neotropical Fauna And Environment. Abingdon: Taylor & Francis Ltd, v. 53, n. 2, p. 120-131, 2018.