Data from: No evidence for a trade-off between sperm length and male premating weaponry

Dataset

Description

Male ornaments and armaments that mediate success in mate acquisition and ejaculate traits influencing competitive fertilization success are under intense sexual selection. However, relative investment in these pre- and postcopulatory traits depends on the relative importance of either selection episode and on the energetic costs and fitness gains of investing in these traits. Theoretical and empirical work has improved our understanding of how precopulatory sexual traits and investments in sperm production covary in this context. It has recently also been suggested that male weapon size may trade off with sperm length as another postcopulatory sexual trait, but the theoretical framework for this suggestion remains unclear. We evaluated the relationship between precopulatory armaments and sperm length, previously reported in ungulates, in five taxa as well as meta-analytically. Within and between taxa, we found no evidence for a negative or positive relationship between sperm length and male traits that are important in male-male contest competition. It is important to consider pre- and postcopulatory sexual selection together to understand fitness, and to study investments in different reproductive traits jointly rather than separately. A trade-off between pre- and postcopulatory sexual traits may not manifest itself in sperm length but rather in sperm number or function. Particularly in large-bodied taxa such as ungulates, sperm number is more variable interspecifically and likely to be under more intense selection than sperm length. We discuss our and the previous results in this context.,Data of Primates, Ungluates, Pheasants, Stalk-eyed flies and Onthophagine dung beetlesComplete data sets of all species of Primates, Ungluates, Pheasants, Stalk-eyed flies and Onthophagine dung beetles used in this study, including data on male and female body size, testes size, male weapon size and/or sexual size dimorphism, as well as sperm length.Datafiles.zipPhylogenies of the Primates, Ungluates, Pheasants, Stalk-eyed flies and Onthophagine dung beetlesPhylogenies in NEXUS format of all species of Primates, Ungluates, Pheasants, Stalk-eyed flies and Onthophagine dung beetles used in this study. All phylogenies are based on published molecular phylogenies. Since no branch lengths were available for most phylogenies, all branch lengths are set to 1 for consistency.Phylogenies.zipReferencesReferences accompanying the data flies and phylogenies,
Date made available14 Sep 2015
PublisherDryad Digital Repository

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