Data from: Reproductive skew drives patterns of sexual dimorphism in sponge-dwelling snapping shrimps

Solomon Tin Chi Chak, J. Emmett Duffy & Dustin R. Rubenstein
Sexual dimorphism is typically a result of strong sexual selection on male traits used in male–male competition and subsequent female choice. However, in social species where reproduction is monopolized by one or a few individuals in a group, selection on secondary sexual characteristics may be strong in both sexes. Indeed, sexual dimorphism is reduced in many cooperatively breeding vertebrates and eusocial insects with totipotent workers, presumably because of increased selection on female traits. Here, we...
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