Artículos de revistas
Variation among vocalizations of Taraba major (Aves: Thamnophilidae) subspecies
Fecha
2018-01-01Registro en:
Studies On Neotropical Fauna And Environment. Abingdon: Taylor & Francis Ltd, v. 53, n. 2, p. 120-131, 2018.
0165-0521
10.1080/01650521.2017.1414983
WOS:000436013400005
WOS000436013400005.pdf
Autor
Universidade Estadual Paulista (Unesp)
Institución
Resumen
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.