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Bilateral Song Convergence in a Passerine Hybrid Zone: Genetics Contribute in One Species Only

Secondi, Jean LU ; Bordas, Paul; Hipsley, Christy A. and Bensch, Staffan LU (2011) In Evolutionary Biology 38(4). p.441-452
Abstract
Hybridization can drive the convergence of territorial and sexual signals. However, non-genetic processes such as competition, environment matching, or cultural transmission, also generate this pattern. We investigated the effect of hybridization on song convergence between two interspecifically territorial warblers in a moving hybrid zone. We confirmed song convergence in each species. Using an AFLP-based genetic index, we detected an effect of genetics on song convergence in Hippolais polyglotta, the expanding species. Evidence was weaker for H. icterina, the receding species. In moving zones, introgression is expected to be larger in the expanding species than in the receding. Thus, the asymmetric contribution of the genetic index to... (More)
Hybridization can drive the convergence of territorial and sexual signals. However, non-genetic processes such as competition, environment matching, or cultural transmission, also generate this pattern. We investigated the effect of hybridization on song convergence between two interspecifically territorial warblers in a moving hybrid zone. We confirmed song convergence in each species. Using an AFLP-based genetic index, we detected an effect of genetics on song convergence in Hippolais polyglotta, the expanding species. Evidence was weaker for H. icterina, the receding species. In moving zones, introgression is expected to be larger in the expanding species than in the receding. Thus, the asymmetric contribution of the genetic index to convergence was consistent with expectations for genetically determined traits in moving hybrid zones, and the observed introgression pattern of AFLP markers. However, the geographical location of individuals had an effect on song variation too when genetics was accounted for, suggesting that convergence also has non-genetic explanations. We examine the possible role of alternative processes to that of hybridization and discuss their conflicting effects on reinforcement and hybrid zone dynamics. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Competition, Interspecific territoriality, Cultural transmission, Hybridization, Hippolais icterina, Hippolais polyglotta
in
Evolutionary Biology
volume
38
issue
4
pages
441 - 452
publisher
Springer
external identifiers
  • wos:000300092100006
  • scopus:81255160903
ISSN
0071-3260
DOI
10.1007/s11692-011-9133-8
language
English
LU publication?
yes
id
69d9a043-253b-425b-b96b-e5092e5def1d (old id 2378551)
date added to LUP
2012-03-27 14:01:24
date last changed
2017-11-12 03:38:16
@article{69d9a043-253b-425b-b96b-e5092e5def1d,
  abstract     = {Hybridization can drive the convergence of territorial and sexual signals. However, non-genetic processes such as competition, environment matching, or cultural transmission, also generate this pattern. We investigated the effect of hybridization on song convergence between two interspecifically territorial warblers in a moving hybrid zone. We confirmed song convergence in each species. Using an AFLP-based genetic index, we detected an effect of genetics on song convergence in Hippolais polyglotta, the expanding species. Evidence was weaker for H. icterina, the receding species. In moving zones, introgression is expected to be larger in the expanding species than in the receding. Thus, the asymmetric contribution of the genetic index to convergence was consistent with expectations for genetically determined traits in moving hybrid zones, and the observed introgression pattern of AFLP markers. However, the geographical location of individuals had an effect on song variation too when genetics was accounted for, suggesting that convergence also has non-genetic explanations. We examine the possible role of alternative processes to that of hybridization and discuss their conflicting effects on reinforcement and hybrid zone dynamics.},
  author       = {Secondi, Jean and Bordas, Paul and Hipsley, Christy A. and Bensch, Staffan},
  issn         = {0071-3260},
  keyword      = {Competition,Interspecific territoriality,Cultural transmission,Hybridization,Hippolais icterina,Hippolais polyglotta},
  language     = {eng},
  number       = {4},
  pages        = {441--452},
  publisher    = {Springer},
  series       = {Evolutionary Biology},
  title        = {Bilateral Song Convergence in a Passerine Hybrid Zone: Genetics Contribute in One Species Only},
  url          = {http://dx.doi.org/10.1007/s11692-011-9133-8},
  volume       = {38},
  year         = {2011},
}