Phenotypic plasticity in sperm traits in scorpionflies (Mecoptera: Panorpidae): consequences of larval history and seasonality on sperm length and sperm transfer [PDF]
, 2009 Vermeulen A, Engels S, Engqvist L, Sauer KP. Phenotypic plasticity in sperm traits in scorpionflies (Mecoptera: Panorpidae): consequences of larval history and seasonality on sperm length and sperm transfer. European Journal of Entomology.
Vermeulen, Andreas +8 more
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Theoretical influence of female mating status and remating propensity on male sperm allocation patterns [PDF]
, 2006 Engqvist L, Reinhold K. Theoretical influence of female mating status and remating propensity on male sperm allocation patterns. JOURNAL OF EVOLUTIONARY BIOLOGY.
Reinhold, Klaus +3 more
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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
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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
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Male scorpionflies assess the amount of rival sperm transferred by females' previous mates [PDF]
, 2007 Engqvist L. Male scorpionflies assess the amount of rival sperm transferred by females' previous mates. Evolution. 2007;61(6):1489-1494.Theory predicts that when sperm compete numerically, selection will favor males who vary the number of sperm they ...
Engqvist, Leif ; https://orcid.org/
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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
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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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A general description of additive and non-additive elements of sperm competitiveness and their relation to male fertilization success [PDF]
, 2013 Engqvist L. A general description of additive and non-additive elements of sperm competitiveness and their relation to male fertilization success. Evolution.
Engqvist, Leif +1 more
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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
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Sperm form and function in the absence of sperm competition [PDF]
Molecular Reproduction and Development, 2013 SUMMARYSperm competition is a post‐copulatory, sexual selection force that, together with phylogeny and fertilization mode, has been regarded as one of the main factors explaining the diversity in sperm size across species. This universal sperm selection mechanism favors traits that enhance a male's fertilizing ability and paternity success ...
Gerhard, van der Horst, Liana, Maree
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