When it comes to sex among guppies, competition is high for those at the top of the game. To get around this predicament, a recent study has shown, guppies use trickery.
Plants & Animals
Sep 9, 2013
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(Phys.org) —Females exposed to a risk of sperm competition have been found to produce more defensive ova compared to the eggs of females reared under no risk of sperm competition, according to researchers at The University ...
Plants & Animals
Oct 17, 2013
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That males are naturally promiscuous while females are coy and choosy is a widely held belief. Even many scientists – including some biologists, psychologists and anthropologists – tout this notion when interviewed by ...
Other
Jan 20, 2017
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New research involving Monash University biologists has debunked the view that males just pass on genetic material and not much else to their offspring. Instead, it found a father's diet can affect their son's ability ...
Plants & Animals
Feb 17, 2017
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The chance of a male fathering offspring may not be a simple race to the egg, but is influenced by the length of the male's sperm, say scientists from the University of Sheffield.
Plants & Animals
Dec 9, 2014
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Leafcutter ant queens can live for twenty years, fertilizing millions of eggs with sperm stored after a single day of sexual activity.
Plants & Animals
Mar 18, 2010
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New research led by The University of Western Australia has shown that the social conditions that a male experiences while growing up can influence the amount of X and Y chromosome sperm that he produces as an adult.
Evolution
Jul 1, 2019
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1
(PhysOrg.com) -- Scientists studying tropical guppies have discovered that the less colorful and attractive males have better quality sperm, while the attractive fish invest in their appearance at the expense of sperm quality.
(Phys.org) —When salmon spawn, males competing to fertilise eggs will win or lose based primarily on their sperm swimming speed, according to a collaborative study by researchers from the University of Otago and the University ...
Plants & Animals
Oct 30, 2013
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Males that face tougher competition for females risk having offspring with a greater number of harmful mutations in their genome than males without rivals. Researchers at Uppsala University have discovered this correlation ...
Plants & Animals
Mar 16, 2020
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