Male choice generates stabilizing sexual selection on a female fecundity correlate

Chenoweth, S. F., Petfield, D., Doughty, P. and Blows, M. W. (2007) Male choice generates stabilizing sexual selection on a female fecundity correlate. Journal of Evolutionary Biology, 20 5: 1745-1750. doi:10.1111/j.1420-9101.2007.01390.x


Author Chenoweth, S. F.
Petfield, D.
Doughty, P.
Blows, M. W.
Title Male choice generates stabilizing sexual selection on a female fecundity correlate
Journal name Journal of Evolutionary Biology   Check publisher's open access policy
ISSN 1010-061X
Publication date 2007-01-01
Sub-type Article (original research)
DOI 10.1111/j.1420-9101.2007.01390.x
Volume 20
Issue 5
Start page 1745
End page 1750
Total pages 6
Editor Fairbairn, D. J.
Merila, J.
Place of publication Oxford, UK
Publisher Wiley-Blackwell Publishing
Language eng
Subject C1
270799 Ecology and Evolution not elsewhere classified
780105 Biological sciences
Abstract We know very little about male mating preferences and how they influence the evolution of female traits. Theory predicts that males may benefit from choosing females on the basis of traits that indicate their fecundity. Here, we explore sexual selection generated by male choice on two components of female body size (wing length and body mass) in Drosophila serrata. Using a dietary manipulation to alter female size and 828 male mate choice trials, we analysed linear and nonlinear sexual selection gradients on female mass and wing length. In contrast to theoretical expectations and prevailing empirical data, males exerted stabilizing rather than directional sexual selection on female body mass, a correlate of fecundity. Sexual selection was detected only among females with access to standard resource levels as an adult, with no evidence for sexual selection among resource-depleted females. Thus the mating success of females with the same body mass differed depending upon their access to resources as an adult. This suggests that males in this species may rely on signal traits to assess body mass rather than assessing it directly. Stabilizing rather than directional sexual selection on body mass together with recent evidence for stabilizing sexual selection on candidate signal traits in this species suggests that females may trade-off resources allocated to reproduction and sexual signalling.
Keyword Ecology
Evolutionary Biology
Genetics & Heredity
Drosophila serrata
male mate choice
sexual selection
stabilizing selection
Male Mate Choice
Drosophila-melanogaster
Natural-selection
Mating Preferences
Blattella-germanica
Genetic Variance
Quality
Traits
Ornamentation
Biosynthesis
Q-Index Code C1
Q-Index Status Confirmed Code

 
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Created: Tue, 19 Feb 2008, 00:55:51 EST