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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...
Intra-sexual dimorphism is found in the weapons of many male beetles. Different behavioral tactics to access females between major and minor males, which adopt fighting and alternative tactics, respectively, are thought to maintain the male dimorphism. In these species major males have enlarged weapons that they use in fights with rival males. Minor males also have small weapons in some of these species,...
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