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

Journal of Evolutionary Biology
Stefan LüpoldJohn L Fitzpatrick

Abstract

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 post-copulatory 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 post-copulatory 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 post-copulatory sexual selection together to understand fitness, and to study investments in different reproductive traits jointly rather tha...Continue Reading

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Citations

Nov 20, 2015·Current Biology : CB·John L Fitzpatrick, Stefan Lüpold
Apr 11, 2017·Evolution; International Journal of Organic Evolution·Stefan LüpoldWen Bo Liao
Apr 11, 2019·Proceedings. Biological Sciences·Stefan LüpoldCyril C Grueter
May 6, 2021·Cells·Charel ReulandJohn L Fitzpatrick

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