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Species-specific song convergence in a moving hybrid zone between two passerines

Secondi, Jean LU ; Bretagnolle, V; Compagnon, C and Faivre, B (2003) In Biological Journal of the Linnean Society 80(3). p.507-517
Abstract
Moving hybrid zones are receiving increasing attention. However, so far little is known about the proximate mechanisms underlying these movements. Signalling behaviour, by individuals engaged in interspecific sexual and aggressive interactions, may play a crucial role. In this study, we investigated song variation within a moving hybrid zone between two warblers, Hippolais polyglotta and H. icterina. In these species, song is involved in interspecific territoriality and, probably, in mixed pairings. We showed that allopatric populations of the two species are clearly acoustically differentiated. However, interspecific differences faded out in sympatry as a result of an overall pattern of convergence. Unexpectedly, the two species converged... (More)
Moving hybrid zones are receiving increasing attention. However, so far little is known about the proximate mechanisms underlying these movements. Signalling behaviour, by individuals engaged in interspecific sexual and aggressive interactions, may play a crucial role. In this study, we investigated song variation within a moving hybrid zone between two warblers, Hippolais polyglotta and H. icterina. In these species, song is involved in interspecific territoriality and, probably, in mixed pairings. We showed that allopatric populations of the two species are clearly acoustically differentiated. However, interspecific differences faded out in sympatry as a result of an overall pattern of convergence. Unexpectedly, the two species converged for different song parameters, namely temporal parameters for H. icterina and syntax for H. polyglotta. Hybridization and interspecific competition could explain convergence in H. icterina. Instead, in H. polyglotta we suggest that local adaptation to habitat and interspecific learning might contribute to convergence. We particularly stress that cross-species learning, by maintaining high levels of interspecific interactions, may influence the movement of the zone. (C) 2003 The Linnean Society of London. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
territoriality, interspecific, interspecific interactions, Hippolais, hybridization, parapatry
in
Biological Journal of the Linnean Society
volume
80
issue
3
pages
507 - 517
publisher
Linnean Society of London
external identifiers
  • wos:000186614800010
  • scopus:0344583854
ISSN
0024-4066
DOI
language
English
LU publication?
yes
id
b8b3a427-4676-4c2c-8acc-e3d6902d7ba3 (old id 295503)
date added to LUP
2007-09-21 12:14:14
date last changed
2018-05-29 11:01:28
@article{b8b3a427-4676-4c2c-8acc-e3d6902d7ba3,
  abstract     = {Moving hybrid zones are receiving increasing attention. However, so far little is known about the proximate mechanisms underlying these movements. Signalling behaviour, by individuals engaged in interspecific sexual and aggressive interactions, may play a crucial role. In this study, we investigated song variation within a moving hybrid zone between two warblers, Hippolais polyglotta and H. icterina. In these species, song is involved in interspecific territoriality and, probably, in mixed pairings. We showed that allopatric populations of the two species are clearly acoustically differentiated. However, interspecific differences faded out in sympatry as a result of an overall pattern of convergence. Unexpectedly, the two species converged for different song parameters, namely temporal parameters for H. icterina and syntax for H. polyglotta. Hybridization and interspecific competition could explain convergence in H. icterina. Instead, in H. polyglotta we suggest that local adaptation to habitat and interspecific learning might contribute to convergence. We particularly stress that cross-species learning, by maintaining high levels of interspecific interactions, may influence the movement of the zone. (C) 2003 The Linnean Society of London.},
  author       = {Secondi, Jean and Bretagnolle, V and Compagnon, C and Faivre, B},
  issn         = {0024-4066},
  keyword      = {territoriality,interspecific,interspecific interactions,Hippolais,hybridization,parapatry},
  language     = {eng},
  number       = {3},
  pages        = {507--517},
  publisher    = {Linnean Society of London},
  series       = {Biological Journal of the Linnean Society},
  title        = {Species-specific song convergence in a moving hybrid zone between two passerines},
  url          = {http://dx.doi.org/},
  volume       = {80},
  year         = {2003},
}