Abstract
The mating system of Achroia grisella (Lepidoptera: Pyralidae) is characterized by male ultrasonic advertisement signalling to which females orientate. Although males provide no direct, somatic benefits to their mates, females prefer males whose signal characters are more exaggerated than the population means. Previous studies showed that the signal characters influencing mate attraction are highly repeatable and heritable. We measured the phenotypic and additive genetic variances (heritability) of female preference in A. grisella, as this additive genetic variance is one of the genetic assumptions of indirect models of sexual selection. We determined the preference index of female A. grisella by repeated phonotaxis trials in which a choice of simulated male signals was presented. These playback experiments showed that female preference indices varied but were repeatable within individuals. Specifically, females differ in the relative importance of the several signal characters during mate assessment. A subsequent half-sib breeding design revealed an amount of additive genetic variance for the female preference index (h(s)/2 = 0.212, SE = 0.1347, P = 0.0611; CV(A) = 0.1826). Our study highlights the importance of careful preparation of test signals and experimental design for quantifying individual variation in (female) preference along multiple signal dimensions.
Original language | English |
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Pages (from-to) | 73-80 |
Number of pages | 8 |
Journal | Heredity |
Volume | 84 |
Issue number | 1 |
DOIs | |
State | Published - Jan 2000 |
Bibliographical note
Funding Information:We are indebted to David Alexander, Butch Brodie, Feng-you Jia, Klaus Reinhold, Gunther Schlager, Larry Sherr, Norm Slade, Andy Snedden and Jason Wolf for helpful discussions and critical comments on this manuscript. Robert Minckley collected the moths used to found our stock population, and June Newman, Thomas Weber and Kelly Williams provided indispensable laboratory assistance with rearing and testing of the moths. This study was supported financially by U.S. National Science Foundation grant IBN 94–07304.
Keywords
- Acoustic communication
- Female preference
- Indirect sexual selection