In vitroantimicrobial sperm protection by an ejaculate-like substance
نویسندگان
چکیده
منابع مشابه
Sperm number trumps sperm size in mammalian ejaculate evolution.
Postcopulatory sexual selection is widely accepted to underlie the extraordinary diversification of sperm morphology. However, why does it favour longer sperm in some taxa but shorter in others? Two recent hypotheses addressing this discrepancy offered contradictory explanations. Under the sperm dilution hypothesis, selection via sperm density in the female reproductive tract favours more but s...
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Among internal fertilizers, typically fewer than 1% sperm survive the journey through the oviduct. Several studies suggest that the sperm reaching the ovum-the 'fertilizing set'-comprise a non-random sub-population, but the characteristics of this group remain unclear. We tested whether oviductal selection in birds results in a morphologically distinct subset of sperm, by exploiting the fact th...
متن کاملCorrelation of ejaCulate parameters and sperm morphology with the ejaCulate volume of pietrain boars
KondracKi, S., K. GorSKi, a. WySoKinSKa and i. JoZWiK, 2014. correlation of ejaculate parameters and sperm morphology with the ejaculate volume of Pietrain boars. Bulg. J. Agric. Sci., 20: 703-709 The objective was to analyze the connection between physical ejaculate parameters and sperm morphology and the volume of Pietrain boar ejaculates. The study covered 87 ejaculates collected from 10 Pol...
متن کاملEffect of sperm concentration in an ejaculate on morphometric traits of spermatozoa in Duroc boars.
The experimental material consisted of 75 ejaculates collected form 8 Duroc boars. The ejaculates were divided into three groups according to sperm concentration in an ejaculate. An ejaculate was obtained from each boar monthly and it was used to make microscopic preparations to examine spermatozoa morphology. In each preparation morphometric measurements were taken of fifteen randomly selected...
متن کاملSperm competition and the evolution of ejaculate composition.
We present a model of sperm competition that incorporates both sperm and nonsperm parts of the ejaculate. Our primary focus is on determining how ejaculate composition and size evolves as a function of the effects of seminal fluid on male reproductive success and as a function of asymmetry in sperm usage by females. The model predicts that different patterns of investment in sperm and seminal p...
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ژورنال
عنوان ژورنال: Functional Ecology
سال: 2012
ISSN: 0269-8463
DOI: 10.1111/1365-2435.12025