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Review Paper. Do Sexual Ornaments Demonstrate Heightened Condition-Dependent Expression as Predicted by the Handicap Hypothesis?

Samuel Cotton, Kevin Fowler and Andrew Pomiankowski
Proceedings: Biological Sciences
Vol. 271, No. 1541 (Apr. 22, 2004), pp. 771-783
Published by: Royal Society
Stable URL: http://www.jstor.org/stable/4142507
Page Count: 13
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Review Paper. Do Sexual Ornaments Demonstrate Heightened Condition-Dependent Expression as Predicted by the Handicap Hypothesis?
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Abstract

The handicap hypothesis of sexual selection predicts that sexual ornaments have evolved heightened condition-dependent expression. The prediction has only recently been subject to experimental investigation. Many of the experiments are of limited value as they: (i) fail to compare condition dependence in sexual ornaments with suitable non-sexual trait controls; (ii) do not adequately account for body size variation; and (iii) typically consider no stress and extreme stress manipulations rather than a range of stresses similar to those experienced in nature. There is also a dearth of experimental studies investigating the genetic basis of condition dependence. Despite the common claim that sexual ornaments are condition-dependent, the unexpected conclusion from our literature review is that there is little support from well-designed experiments.

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