Sperm competition when transfer is dangerous. [PDF]
Philos Trans R Soc Lond B Biol Sci, 2020 Aggressive and cannibalistic female spiders can impose strong selection on male mating and fertilization strategies. Furthermore, the distinctive reproductive morphology of spiders is predicted to influence the outcome of sperm competition.
Tuni C +3 more
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Using Gamma Irradiation to Predict Sperm Competition Mechanism in Bagrada hilaris (Burmeister) (Hemiptera: Pentatomidae): Insights for a Future Management Strategy [PDF]
Insects, 2023 The stink bug, Bagrada hilaris, is a pest of mainly Brassicaceae crops. It is native to Africa and Asia and was recently reported as invasive in the southwestern part of the USA and in South America.
Chiara Elvira Mainardi +7 more
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Audience effects in the Atlantic molly (
Frontiers in Zoology, 2009 Background Multidirectional interactions in social networks can have a profound effect on mate choice behavior; e.g., Poecilia mexicana males show weaker expression of mating preferences when being observed by a rival. This may be an adaptation to reduce
Kronmarck Claudia +6 more
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Sperm competition risk drives rapid ejaculate adjustments mediated by seminal fluid
eLife, 2017 In many species, males can make rapid adjustments to ejaculate performance in response to sperm competition risk; however, the mechanisms behind these changes are not understood.
Michael J Bartlett +3 more
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Sperm competition in humans: mate guarding behavior negatively correlates with ejaculate quality. [PDF]
PLoS ONE, 2014 In species where females mate with multiple males, the sperm from these males must compete to fertilise available ova. Sexual selection from sperm competition is expected to favor opposing adaptations in males that function either in the avoidance of ...
Samantha Leivers +2 more
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Structural variation in Drosophila melanogaster spermathecal ducts and its association with sperm competition dynamics [PDF]
Royal Society Open Science, 2020 The ability of female insects to retain and use sperm for days, months, or even years after mating requires specialized storage organs in the reproductive tract.
Ben R. Hopkins +2 more
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Variation in Eusperm Length May Reflect Reproductive Barriers and Differences in Sperm Competition Intensity Among Littorina Snails [PDF]
Ecology and EvolutionReproductive barriers limit gene flow and drive population divergence. Sperm morphology plays an important role in reproductive barriers, as successful fertilization depends on how well sperm perform in the female environment.
Luisa Kumpitsch +3 more
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Male diet affects female fitness and sperm competition in human- and bat-associated lineages of the common bedbug, Cimex lectularius [PDF]
Scientific Reports, 2021 Sperm performance can vary in ecologically divergent populations, but it is often not clear whether the environment per se or genomic differences arising from divergent selection cause the difference.
Jana Křemenová +7 more
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Biology Open, 2015 Sperm competition is a prevalent phenomenon that drives the evolution of sperm function. High levels of sperm competition lead to increased metabolism to fuel higher sperm velocities.
Javier delBarco-Trillo +2 more
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Variation in apical hook length reflects the intensity of sperm competition in murine rodents. [PDF]
PLoS ONE, 2013 BackgroundPost-copulatory sexual selection has been shown to shape morphology of male gametes. Both directional and stabilizing selection on sperm phenotype have been documented in vertebrates in response to sexual promiscuity.MethodologyHere we ...
Martin Šandera +2 more
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