Differences in the fatty-acid composition of rodent spermatozoa are associated to levels of sperm competition by Javier delBarco-Trillo, Rafael Mateo, Eduardo R. S. Roldan

Subjects: “…Sperm competition…”
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Sperm competition risk drives rapid ejaculate adjustments mediated by seminal fluid by Michael J Bartlett, Tammy E Steeves, Neil J Gemmell, Patrice C Rosengrave

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Divergent natural selection alters male sperm competition success in Drosophila melanogaster by Ralph Dobler, Marc Charette, Katrin Kaplan, Biz R. Turnell, Klaus Reinhardt

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Variation in apical hook length reflects the intensity of sperm competition in murine rodents. by Martin Šandera, Tomáš Albrecht, Pavel Stopka

“…Hence, the higher risk of sperm competition affects increasing hook length together with decreasing variance in the hook length. …”
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Sperm competition in humans: mate guarding behavior negatively correlates with ejaculate quality. by Samantha Leivers, Gillian Rhodes, Leigh W Simmons

“…Sexual selection from sperm competition is expected to favor opposing adaptations in males that function either in the avoidance of sperm competition (by guarding females from rival males) or in the engagement in sperm competition (by increased expenditure on the ejaculate). …”
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Accessory gland size increases with sperm competition intensity in Cataglyphis desert ants by Félicien Degueldre, Serge Aron

Subjects: “…sperm competition…”
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First evidence for backcrossing of F1 hybrids in Acropora corals under sperm competition by Seiya Kitanobo, Kenji Iwao, Hironobu Fukami, Naoko Isomura, Masaya Morita

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Impact of low sperm competition on male reproductive trait allometries in a bush-cricket by Lennart Winkler, Leon M. Kirch, Klaus Reinhold, Steven A. Ramm

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Structural variation in Drosophila melanogaster spermathecal ducts and its association with sperm competition dynamics by Ben R. Hopkins, Irem Sepil, Stuart Wigby

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Rival male relatedness does not affect ejaculate allocation as predicted by sperm competition theory. by Melissa L Thomas, Leigh W Simmons

“…When females are sexually promiscuous, the intensity of sperm competition for males depends on how many partners females mate with. …”
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Sperm tendency to agglutinate in motile bundles in relation to sperm competition and fertility duration in chickens by M. A. M. Sayed, Hanan H. Abd-Elhafeez, O. S. Afifi, M. W. Marzouk, Taymour M. El-Sherry

“…Sperm agglutination behavior, kinematics, and some morphometric measures were studied in relation to sperm competition and fertility duration in Sharkasi and Dandarawi chickens. …”
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The Relationship between Sperm Morphometry and Sperm Competition in Local Goats of Central Java, Indonesia by S. B. Wibowo, E. T. Setiatin, E. Kurnianto

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The baculum affects paternity success of first but not second males in house mouse sperm competition by Lennart Winkler, Anna K. Lindholm, Steven A. Ramm, Andreas Sutter

“…Studies showing that the morphology of the mammalian baculum (penis bone) can covary with a male’s paternity success indicate a potential impact of baculum morphology on male fitness, likely through influencing sperm competition outcomes. We therefore measured the size (measurements of length and width) and shape (geometric morphometric measurements) of the bacula of male house mice used in previously published sperm competition experiments, in which two males mated successively with the same female in staged matings. …”
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The heritability of mating behaviour in a fly and its plasticity in response to the threat of sperm competition. by Amanda Bretman, Anne Lizé, Craig A Walling, Tom A R Price

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Correction: Variation in Apical Hook Length Reflects the Intensity of Sperm Competition in Murine Rodents

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Mass-specific metabolic rate and sperm competition determine sperm size in marsupial mammals. by Maximiliano Tourmente, Montserrat Gomendio, Eduardo R S Roldan

“…Our findings support both hypotheses because levels of sperm competition are associated with increases in sperm size, but low mass-specific metabolic rate constrains sperm size among large species. …”
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Selection on female remating interval is influenced by male sperm competition strategies and ejaculate characteristics. by Alonzo, S, Pizzari, T

“…Female remating rate dictates the level of sperm competition in a population, and extensive research has focused on how sperm competition generates selection on male ejaculate allocation. …”

Structural variation in Drosophila melanogaster spermathecal ducts and its association with sperm competition dynamics by Hopkins, BR, Sepil, I, Wigby, S

“…This raises the possibility that SDPs provide a mechanism for variation in sperm competition outcome among females.…”

Selection on female remating interval is influenced by male sperm competition strategies and ejaculate characteristics. by Alonzo, S, Pizzari, T

“…Female remating rate dictates the level of sperm competition in a population, and extensive research has focused on how sperm competition generates selection on male ejaculate allocation. …”

Unique sperm haplotypes are associated with phenotypically different sperm subpopulations in Astyanax fish by Richard Borowsky, Alissa Luk, Xinjian He, Rebecca S. Kim

Subjects: “…Sperm competition…”
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