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Male-male competition frequently results in the evolution of sexually selected traits used as weapons and ornaments. The expression of these traits often depends on male condition, i.e., condition dependence. Although males often have multiple sexually selected traits, to date many studies have focused on the morphological analysis of one sexual trait whilst ignoring the others. We here report phenotypic...
Male fighting frequently results in the evolution of traits used as weapons. Additionally, males with well-developed weapons typically differ behaviourally and morphologically from weaponless males. However, the genetic basis to these phenotypic correlations has not been investigated. The broad-horned flour beetle, Gnatocerus cornutus, is a species in which males engage in fights using their enlarged...
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