Increased male investment in sperm competition results in reduced maintenance of gametes. [PDF]
PLoS Biol, 2023 Koppik M, Baur J, Berger D.
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Sperm competition, sperm numbers and sperm quality in muroid rodents. [PDF]
PLoS ONE, 2011 Sperm competition favors increases in relative testes mass and production efficiency, and changes in sperm phenotype that result in faster swimming speeds. However, little is known about its effects on traits that contribute to determine the quality of a
Laura Gómez Montoto +7 more
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Female Genetic Contributions to Sperm Competition in Drosophila melanogaster. [PDF]
Genetics, 2019 There is extensive variation in males for sperm competitive abilities, and in females for the ability to distinguish among sperm from different males. But it is still not known how females distinguish males...
Chen DS +8 more
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Phenotypic plasticity in genitalia: baculum shape responds to sperm competition risk in house mice
Proceedings of the Royal Society B: Biological Sciences, 2018 Males are known to adjust their expenditure on testes growth and sperm production in response to sperm competition risk. Genital morphology can also contribute to competitive fertilization success but whether male genital morphology can respond ...
Gonçalo I. André +2 more
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Impact of low sperm competition on male reproductive trait allometries in a bush-cricket [PDF]
BMC Evolutionary Biology, 2019 Background Studying reproductive trait allometries can help to understand optimal male investment strategies under sexual selection. In promiscuous mating systems, studies across several taxa suggest that testes allometry is usually positive, presumably ...
Lennart Winkler +3 more
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First evidence for backcrossing of F1 hybrids in Acropora corals under sperm competition. [PDF]
Sci Rep, 2022 Kitanobo S +4 more
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Male responses to sperm competition risk associated with increased macronutrient intake and reduced lifespan. [PDF]
Biol Lett, 2023 Simmons LW, Chan HL.
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Sexual Conflict and Sperm Competition [PDF]
Cold Spring Harbor Perspectives in Biology, 2014 Traits that increase a male's fertilization success during sperm competition can be harmful to females and therefore represent a source of sexual conflict. In this review, we consider the variety of male adaptations to sperm competition (MASC) that may give rise to sexual conflict-including mate guarding, prolonged copulations, the transfer of large ...
Dominic A, Edward +2 more
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Human Sperm Competition: A Comparative Evolutionary Analysis [PDF]
Animal Behavior and Cognition, 2014 Sperm competition occurs when a female copulates with two or more males within a sufficiently brief time period, resulting in sperm of the different males competing to fertilize ova.
Michael N. Pham, Todd K. Shackelford
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