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.
Mainardi CE +7 more
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Genetic Factors Influencing Sperm Competition. [PDF]
Front Genet, 2019 Females of many different species often mate with multiple males, creating opportunities for competition among their sperm. Although originally unappreciated, sperm competition is now considered a central form of post-copulatory male–male competition ...
Civetta A, Ranz JM.
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Variation in Eusperm Length May Reflect Reproductive Barriers and Differences in Sperm Competition Intensity Among <i>Littorina</i> Snails. [PDF]
Ecol EvolReproductive 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.
Kumpitsch L +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]
Sci Rep, 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.
Křemenová J +7 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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Postcopulatory sexual selection results in spermatozoa with more uniform head and flagellum sizes in rodents. [PDF]
PLoS ONE, 2014 Interspecific comparative studies have shown that, in most taxa, postcopulatory sexual selection (PCSS) in the form of sperm competition drives the evolution of longer and faster swimming sperm.
María Varea-Sánchez +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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By hook or by crook? Morphometry, competition and cooperation in rodent sperm. [PDF]
PLoS ONE, 2007 BACKGROUND: Sperm design varies enormously across species and sperm competition is thought to be a major factor influencing this variation. However, the functional significance of many sperm traits is still poorly understood.
Simone Immler +3 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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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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