Sexual signal exaggeration affects physiological state in male barn swallows

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Sexual signal exaggeration affects physiological state in male barn swallows

A prevailing view in sexual selection theory is that costly physiological processes underlie the development, maintenance and expression of sexual signals, and that the costs of these signals enforce their honesty [1,2]. However, this unidirectional view of how physiology governs signal expression is narrow, because many of the putative physiological underpinnings of signals, such as health sta...

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Uninformative Exaggeration of Male Sexual Ornaments in Barn Swallows

Models of sexual selection suggest that mate-choice preferences are favored because differences between males in their degree of ornamental exaggeration convey useful information about the direct or indirect benefits they have to offer [1-5]. Such arguments assume that variation in male ornament size can be attributed to variation in the degree of sexually selected exaggeration. We provide the ...

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Experimental tail shortening in Barn Swallows ( Hirundo rustica ) affects haematocrit

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ژورنال

عنوان ژورنال: Current Biology

سال: 2008

ISSN: 0960-9822

DOI: 10.1016/j.cub.2008.03.031