Data from: Disentangling the contribution of sexual selection and ecology to the evolution of size dimorphism in pinnipeds

Oliver Krüger, Jochen B. W. Wolf, Rudy M. Jonker, Joseph I. Hoffman & Fritz Trillmich
The positive relationship between sexual size dimorphism (SSD) and harem size across pinnipeds is often cited as a textbook example of sexual selection. It assumes that female aggregation selected for large male size via male-male competition. Yet, it is also conceivable that SSD evolved prior to polygyny due to ecological forces. We analysed eleven life history traits in 35 pinniped species to determine their co-evolutionary dynamics and infer their most likely evolutionary trajectories contrasting these...
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