Abstract:13Sexually selected traits are hypothesized to be honest signals of individual quality due to the 14 costs associated with their development or expression. Testosterone, a sex steroid known to 15 influence the production of sexually selected traits, has been proposed to underlie the costs 16 associated with sexually selected traits via its immunosuppressive effects (i.e., the 17 Immunocompetence Handicap Hypothesis) or by influencing an individual's 18 exposure/susceptibility to oxidative stress (i.e., the Oxi… Show more
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