Results 31 to 40 of about 19,844 (294)
Angewandte Chemie, EarlyView.We present a bioluminescent diagnostic platform that integrates DNA amplification and detection in a single step. The engineering of thermostable luciferase‐intercalating dye conjugates and controlled release of caged luciferin substrates enable real‐time, detection of attomolar concentrations of viral DNA within 30 min.
Yosta de Stigter +8 more
wiley +2 more sources
Sperm competition and sperm length in shorebirds [PDF]
, 1999 We investigated how sperm morphology varies across 16 species of shorebirds in the Scolopacidae, Charadriidae, and Jacanidae. Sperm were significantly longer in nonmonogamous than in socially monogamous species.
Briskie, J V, Johnson, D D P
core +1 more source
Seminal fluid affects sperm viability in a cricket.
PLoS ONE, 2011 Recent studies have suggested that males may vary the quality of their ejaculates in response to sperm competition, although the mechanisms by which they do so remain unclear.
Leigh W Simmons, Maxine Beveridge
doaj +1 more source
Experimental evolution of sperm competitiveness in a mammal
BMC Evolutionary Biology, 2011 Background When females mate with multiple partners, sperm from rival males compete to fertilise the ova. Studies of experimental evolution have proven the selective action of sperm competition on male reproductive traits.
Simmons Leigh W, Firman Renée C
doaj +1 more source
Sperm competition games: optimal sperm allocation in response to the size of competing ejaculates
, 2007 Engqvist L, Reinhold K. Sperm competition games: optimal sperm allocation in response to the size of competing ejaculates. Proceedings of the Royal Society B.
Reinhold, Klaus +1 more
core +1 more source
Postcopulatory sexual selection is associated with reduced variation in sperm morphology. [PDF]
PLoS ONE, 2007 The evolutionary role of postcopulatory sexual selection in shaping male reproductive traits, including sperm morphology, is well documented in several taxa.
Sara Calhim +2 more
doaj +1 more source
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
doaj +1 more source
Frontiers in Ecology and Evolution, 2015 How much of a fitness benefit is obtained by dominant males of external fertilizers from releasing ejaculates in synchrony with female egg-release when engaging in sperm competition, and what is the most important sperm trait for paternity in these ...
Torvald Blikra Egeland +4 more
doaj +1 more source
Pitfalls in experiments testing predictions from sperm competition theory
, 2005 Engqvist L, Reinhold K. Pitfalls in experiments testing predictions from sperm competition theory. Journal of Evolutionary Biology. 2005;18(1):116-123.As females of many species mate with more than one male, ejaculates often face competition from the ...
Reinhold, Klaus +3 more
core +1 more source
Rival seminal fluid induces enhanced sperm motility in a polyandrous ant
BMC Evolutionary Biology, 2018 Background Promiscuous mating and sperm competition often induce arms races between the sexes with detrimental outcomes for females. However, ants with multiply-inseminated queens have only a single time-window for sperm competition and queens are ...
Joanito Liberti +2 more
doaj +1 more source