La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Bird sounds as taxonomic characters (2012)
Auteurs :	Dieter Thomas Tietze, Auteur
Type de document :	Article
Dans :	Vogelwarte (50(2) MAY 2012)
Article en page(s) :	79-86
Langues:	Allemand
Résumé :	Bird vocalizations connected to reproduction are mostly species-specific, hence they may be used as taxonomic characters. They have special relevance when in bird species which are able to learn song speciation processes at an accelerated pace. According to the biological species concept, species are populations which are reproductively isolated from other populations. Thus it can easily be decided, if two forms occurring in the same place are species. But if their distributions do not overlap, a contact can be simulated by means of playback experiments. Otherwise homologous vocalizations have to be compared like on a supra-specific level: Such comparisons may be performed descriptively according to auditory impression, or based on the visualization (sonagram), or statistically on parameters measured from the sonagram. In case a (molecular) phylogeny of the genus or family under investigation is available, the analyzed parameters should be tested for phylogenetic signal to exclude merely adaptive characters.

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