Experimental evidence for multivariate stabilizing sexual selection

Brooks, R., Hunt, J., Blows, M. W., Smith, M. J., Bussiere, L. F. and Jennions, M. D. (2005) Experimental evidence for multivariate stabilizing sexual selection. Evolution, 59 4: 871-880. doi:10.1554/04-662

Author Brooks, R.
Hunt, J.
Blows, M. W.
Smith, M. J.
Bussiere, L. F.
Jennions, M. D.
Title Experimental evidence for multivariate stabilizing sexual selection
Journal name Evolution   Check publisher's open access policy
ISSN 0014-3820
Publication date 2005-01-01
Year available 2005
Sub-type Article (original research)
DOI 10.1554/04-662
Open Access Status
Volume 59
Issue 4
Start page 871
End page 880
Total pages 10
Editor D. M. Waller
Place of publication Lawrence
Publisher Society for the Study of Evolution
Language eng
Subject C1
270799 Ecology and Evolution not elsewhere classified
780105 Biological sciences
Abstract Stabilizing selection is a fundamental concept in evolutionary biology. In the presence of a single intermediate optimum phenotype (fitness peak) on the fitness surface, stabilizing selection should cause the population to evolve toward such a peak. This prediction has seldom been tested, particularly for suites of correlated traits. The lack of tests for an evolutionary match between population means and adaptive peaks may be due, at least in part, to problems associated with empirically detecting multivariate stabilizing selection and with testing whether population means are at the peak of multivariate fitness surfaces. Here we show how canonical analysis of the fitness surface, combined with the estimation of confidence regions for stationary points on quadratic response surfaces, may be used to define multivariate stabilizing selection on a suite of traits and to establish whether natural populations reside on the multivariate peak. We manufactured artificial advertisement calls of the male cricket Teleogryllus commodus and played them back to females in laboratory phonotaxis trials to estimate the linear and nonlinear sexual selection that female phonotactic choice imposes on male call structure. Significant nonlinear selection on the major axes of the fitness surface was convex in nature and displayed an intermediate optimum, indicating multivariate stabilizing selection. The mean phenotypes of four independent samples of males, from the same population as the females used in phonotaxis trials, were within the 95% confidence region for the fitness peak. These experiments indicate that stabilizing sexual selection may play an important role in the evolution of male call properties in natural populations of T. commodus.
Keyword Evolutionary Biology
Genetics & Heredity
Adaptive Landscape
Call Structure
Nonlinear Selection
Selection Analysis
Selection Gradient
Stabilizing Selection
Quantitative Genetic-variation
Painted Reed Frogs
Preference Functions
Mating Preferences
Advertisement Call
Cricket Frog
Q-Index Code C1
Institutional Status UQ

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Created: Wed, 15 Aug 2007, 15:21:27 EST