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Asymmetric song recognition between recently diverged subspecies of reed bunting

Gordinho, Luís; Hasselquist, Dennis LU and Neto, Julio LU (2016) In Behavioral Ecology 27(5). p.1413-1423
Abstract
Acoustic divergence among populations may result in assortative mating, behavioral isolation, and speciation. In birds, the recogni- tion of suitable mates depends to a large extent on learning, generally resulting in a tendency to discriminate against nonlocal stimuli. However, there may be geographical variation in the discrimination against nonlocal stimuli, and this may allow inferring the mechanisms behind the evolution of vocal recognition. We tested territorial males of 3 west European subspecies of reed bunting (Emberiza schoeniclus schoeniclus, Emberiza schoeniclus lusitanica, and Emberiza schoeniclus witherbyi) using song playback to determine the level of song discrimination. We found that witherbyi and, to some extent... (More)
Acoustic divergence among populations may result in assortative mating, behavioral isolation, and speciation. In birds, the recogni- tion of suitable mates depends to a large extent on learning, generally resulting in a tendency to discriminate against nonlocal stimuli. However, there may be geographical variation in the discrimination against nonlocal stimuli, and this may allow inferring the mechanisms behind the evolution of vocal recognition. We tested territorial males of 3 west European subspecies of reed bunting (Emberiza schoeniclus schoeniclus, Emberiza schoeniclus lusitanica, and Emberiza schoeniclus witherbyi) using song playback to determine the level of song discrimination. We found that witherbyi and, to some extent lusitanica, males largely ignored schoeniclus songs. However, witherbyi reacted less strongly to the songs of lusitanica than lusitanica did to songs of witherbyi. In contrast, schoenic- lus males did not discriminate the songs of the different subspecies, reacting strongly to all. Differential territorial defense behavior suggest that intruding males with different songs do not represent the same competitive threat, and provide evidence of premating reproductive isolation among these recently evolved subspecies. The high discrimination exhibited by witherbyi and lusitanica seems associated with the high level of local adaptation. Overall, the pattern of premating reproductive isolation appears to agree more with the ecological than with the neutral genetic divergences between subspecies, suggesting that there is an ongoing process of ecological speciation in this study system. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
behavioral barrier, birdsong, contest escalation, discrimination, Emberiza schoeniclus, playback experient, reproductive isolation, response, sexual selection
in
Behavioral Ecology
volume
27
issue
5
pages
11 pages
publisher
Oxford University Press
external identifiers
  • scopus:84989964344
  • wos:000384650600022
ISSN
1045-2249
DOI
10.1093/beheco/arw062
language
English
LU publication?
yes
id
6a2591c0-929c-49c6-bb4a-2b3a7ba1bc96
date added to LUP
2016-11-15 10:04:28
date last changed
2017-07-30 05:17:19
@article{6a2591c0-929c-49c6-bb4a-2b3a7ba1bc96,
  abstract     = { Acoustic divergence among populations may result in assortative mating, behavioral isolation, and speciation. In birds, the recogni- tion of suitable mates depends to a large extent on learning, generally resulting in a tendency to discriminate against nonlocal stimuli. However, there may be geographical variation in the discrimination against nonlocal stimuli, and this may allow inferring the mechanisms behind the evolution of vocal recognition. We tested territorial males of 3 west European subspecies of reed bunting (Emberiza schoeniclus schoeniclus, Emberiza schoeniclus lusitanica, and Emberiza schoeniclus witherbyi) using song playback to determine the level of song discrimination. We found that witherbyi and, to some extent lusitanica, males largely ignored schoeniclus songs. However, witherbyi reacted less strongly to the songs of lusitanica than lusitanica did to songs of witherbyi. In contrast, schoenic- lus males did not discriminate the songs of the different subspecies, reacting strongly to all. Differential territorial defense behavior suggest that intruding males with different songs do not represent the same competitive threat, and provide evidence of premating reproductive isolation among these recently evolved subspecies. The high discrimination exhibited by witherbyi and lusitanica seems associated with the high level of local adaptation. Overall, the pattern of premating reproductive isolation appears to agree more with the ecological than with the neutral genetic divergences between subspecies, suggesting that there is an ongoing process of ecological speciation in this study system.},
  author       = {Gordinho, Luís and Hasselquist, Dennis and Neto, Julio},
  issn         = {1045-2249},
  keyword      = {behavioral barrier,birdsong,contest escalation,discrimination,Emberiza schoeniclus,playback experient,reproductive isolation,response,sexual selection},
  language     = {eng},
  number       = {5},
  pages        = {1413--1423},
  publisher    = {Oxford University Press},
  series       = {Behavioral Ecology},
  title        = {Asymmetric song recognition between recently diverged subspecies of reed bunting},
  url          = {http://dx.doi.org/10.1093/beheco/arw062},
  volume       = {27},
  year         = {2016},
}