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Effect of Species Interaction on Beak Integration in an Avian Hybrid Species Complex

Eroukhmanoff, F.; Elgvin, T. O.; Rojas, M. F. Gonzalez; Haas, Fredrik LU ; Hermansen, J. S. and Saetre, G-P. (2014) In Evolutionary Biology 41(3). p.452-458
Abstract
Theory predicts that variability in size and the shape of a morphological trait should often be stable both at the intra- and interspecific level. We studied variation in beak integration among several populations of two species of the genus Passer, a hybrid species, the Italian sparrow (Passer italiae) and one of its parents, the Spanish sparrow (Passer hispaniolensis). We show that the general shape of the beak has been conserved in these two species and that hybrid speciation has had no major effects on beak integration. However, in young, sympatric populations, phenotypic integration between beak height and length decreased significantly, to the extent that these two dimensions apparently became independent. This displacement in... (More)
Theory predicts that variability in size and the shape of a morphological trait should often be stable both at the intra- and interspecific level. We studied variation in beak integration among several populations of two species of the genus Passer, a hybrid species, the Italian sparrow (Passer italiae) and one of its parents, the Spanish sparrow (Passer hispaniolensis). We show that the general shape of the beak has been conserved in these two species and that hybrid speciation has had no major effects on beak integration. However, in young, sympatric populations, phenotypic integration between beak height and length decreased significantly, to the extent that these two dimensions apparently became independent. This displacement in phenotypic integration seems to be accompanied with changes in the distribution of phenotypic variation at the univariate level. This suggests that while beak shape may have been constrained over evolutionary time-scales and major hybridization events (i.e. the formation of the hybrid Italian sparrow), under specific selection regimes linked to secondary contact, it can evolve rapidly. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Beak shape, Character displacement, Hybridization, Phenotypic, integration, Speciation
in
Evolutionary Biology
volume
41
issue
3
pages
452 - 458
publisher
Springer
external identifiers
  • wos:000340528800007
  • scopus:84906065991
ISSN
0071-3260
DOI
10.1007/s11692-014-9278-3
language
English
LU publication?
yes
id
bd8c2dc6-506f-43a9-b6a3-bbd0ae725e72 (old id 4656219)
date added to LUP
2014-09-24 13:40:24
date last changed
2017-05-28 04:09:41
@article{bd8c2dc6-506f-43a9-b6a3-bbd0ae725e72,
  abstract     = {Theory predicts that variability in size and the shape of a morphological trait should often be stable both at the intra- and interspecific level. We studied variation in beak integration among several populations of two species of the genus Passer, a hybrid species, the Italian sparrow (Passer italiae) and one of its parents, the Spanish sparrow (Passer hispaniolensis). We show that the general shape of the beak has been conserved in these two species and that hybrid speciation has had no major effects on beak integration. However, in young, sympatric populations, phenotypic integration between beak height and length decreased significantly, to the extent that these two dimensions apparently became independent. This displacement in phenotypic integration seems to be accompanied with changes in the distribution of phenotypic variation at the univariate level. This suggests that while beak shape may have been constrained over evolutionary time-scales and major hybridization events (i.e. the formation of the hybrid Italian sparrow), under specific selection regimes linked to secondary contact, it can evolve rapidly.},
  author       = {Eroukhmanoff, F. and Elgvin, T. O. and Rojas, M. F. Gonzalez and Haas, Fredrik and Hermansen, J. S. and Saetre, G-P.},
  issn         = {0071-3260},
  keyword      = {Beak shape,Character displacement,Hybridization,Phenotypic,integration,Speciation},
  language     = {eng},
  number       = {3},
  pages        = {452--458},
  publisher    = {Springer},
  series       = {Evolutionary Biology},
  title        = {Effect of Species Interaction on Beak Integration in an Avian Hybrid Species Complex},
  url          = {http://dx.doi.org/10.1007/s11692-014-9278-3},
  volume       = {41},
  year         = {2014},
}