Data from: Operational sex ratio but not density affects sexual selection in a fish

Sebastian Wacker, Kenyon Mobley, Elisabet Forsgren, Lise Cats Myhre, Karen De Jong & Trond Amundsen
The operational sex ratio (OSR) and density are considered important factors affecting the strength of sexual selection. While there is increasing evidence that OSR and density affect the potential for sexual selection, few studies have addressed whether this is realized in phenotypic selection and how the two factors interact. We manipulated OSR (three levels) and male density (two levels) in 36 experimental breeding populations of Gobiusculus flavescens – a fish with paternal care. We measured...
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