Genetic population structure and call variation in a passerine bird, the satin bowerbird, Ptilonorhynchus violaceus

Nicholls, J. A., Austin, J. J., Moritz, C. and Goldizen, A. W. (2006) Genetic population structure and call variation in a passerine bird, the satin bowerbird, Ptilonorhynchus violaceus. Evolution, 60 6: 1279-1290. doi:10.1554/05-560.1


Author Nicholls, J. A.
Austin, J. J.
Moritz, C.
Goldizen, A. W.
Title Genetic population structure and call variation in a passerine bird, the satin bowerbird, Ptilonorhynchus violaceus
Journal name Evolution   Check publisher's open access policy
ISSN 0014-3820
Publication date 2006-01-01
Sub-type Article (original research)
DOI 10.1554/05-560.1
Volume 60
Issue 6
Start page 1279
End page 1290
Total pages 12
Place of publication Lawrence
Publisher Soc Study Evolution
Language eng
Subject C1
270707 Sociobiology and Behavioural Ecology
780105 Biological sciences
Abstract Geographic variation in vocalizations is widespread in passerine birds, but its origins and maintenance remain unclear. One hypothesis to explain this variation is that it is associated with geographic isolation among populations and therefore should follow a vicariant pattern similar to that typically found in neutral genetic markers. Alternatively, if environmental selection strongly influences vocalizations, then genetic divergence and vocal divergence may be disassociated. This study compared genetic divergence derived from 11 microsatellite markers with a metric of phenotypic divergence derived from male bower advertisement calls. Data were obtained from 16 populations throughout the entire distribution of the satin bowerbird, an Australian wet-forest-restricted passerine. There was no relationship between call divergence and genetic divergence, similar to most other studies on birds with learned vocalizations. Genetic divergence followed a vicariant model of evolution, with the differentiation of isolated populations and isolation-by-distance among continuous populations. Previous work on Ptilonorhynchus violaceus has shown that advertisement call structure is strongly influenced by the acoustic environment of different habitats. Divergence in vocalizations among genetically related populations in different habitats indicates that satin bowerbirds match their vocalizations to the environment in which they live, despite the homogenizing influence of gene flow. In combination with convergence of vocalizations among genetically divergent populations occurring in the same habitat, this shows the overriding importance that habitat-related selection can have on the establishment and maintenance of variation in vocalizations.
Keyword Geographic Vocal Variation
Habitat-dependent Selection
Population Genetic Structure
Ptilonorhynchus Violaceus
Vicariance
Ecology
Evolutionary Biology
Genetics & Heredity
Rufous-collared Sparrow
Song Dialect Populations
White-crowned Sparrows
Rain-forest Refugia
Vocal Dialects
Geographic-variation
Microsatellite Markers
Ecological Gradients
Zonotrichia-capensis
Wet Tropics
Q-Index Code C1

 
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Created: Wed, 15 Aug 2007, 18:47:28 EST