La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Song differences between populations of seven subspecies of the African forest weaver Ploceus bicolor Vieillot (Aves : Passeriformes)
Auteurs :	W. Wickler, Auteur ; U. Seibt, Auteur ; D. Schmidl, Auteur
Type de document :	Article
Dans :	Journal of Ornithology (147(1) JAN 2006)
Article en page(s) :	87-96
Langues:	Anglais
Résumé :	We present an analysis of song type differences between populations of seven forest weaver (Ploceus bicolor) subspecies. Phonology and syntax of the melodious parts of song types differ between these populations to the same extent as they differ between population-specific dialects within a subspecies. Phonological and syntactical song features are socially transmitted; they can be transmitted even between representatives of taxonomically different subspecies. The Harsh Call, a complex element embedded in the melody, is of similar structure in populations of four South African subspecies, but shows markedly different characteristics in populations of the subspecies from Kenya and Cameroon. Song differences between populations are suggested to result from cultural drift and geographic isolation. A correspondence between genetically determined morphological structures on the one hand and socially transmitted song structure on the other seems to be a coincidence due to geographic separation.

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