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Título: | The relationship between syllable repertoire similarity and pairing success in a passerine bird species with complex song |
Autor: | Garamszegi, László Z. CSIC ORCID; Zsebök, Sándor; Török, János | Fecha de publicación: | 2012 | Editor: | Academic Press | Citación: | Journal of Theoretical Biology 295: 68- 76 (2012) | Resumen: | Repertoire size, i.e. the number of unique song elements that an individual possesses, is thought to be an important target of female preference. However, the use of repertoire size reflects how researchers work with complex songs; while it does not necessary describe biological functions, as listeners of song may also rely on song composition. Specific syllables may have coherent consequences for mate attraction because they are costly to produce, mediate syllable sharing or indicate the dialect of origin. We tested for the relationship between song composition and pairing success in the collared flycatcher (Ficedula albicollis). We applied a tree-clustering method to hierarchically classify males based on the degree of repertoire overlap, and then used a phylogenetic approach to assess the degree by which pairing speed matches the hierarchically structured song data. We found that males using similar syllables also find a breeding partner at a similar speed. Partitioning the variance components of pairing speed, we detected that the consequences of particular syllables for mating are repeatable across males. When assessing the role of repertoire similarity in mediating direct syllable sharing, we derived a positive relationship between the physical distance between pairs of males and their repertoire overlap implying that neighboring males avoid copying each other's song. Finally, we were unable to demonstrate that syllables related to higher mating success are more common in the population, which would support mechanisms based on female preference for local songs. Our results imply that individual-specific song organization may be relevant for sexual selection. © 2011 Elsevier Ltd. | URI: | http://hdl.handle.net/10261/67476 | DOI: | 10.1016/j.jtbi.2011.11.011 | Identificadores: | doi: 10.1016/j.jtbi.2011.11.011 issn: 0022-5193 |
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