Imagine if you only had one shot at passing on your genes before you died. It happens more often in the natural world than you might expect: suicidal reproduction – where one or both sexes of a species die after a single ...
Plants & Animals
Oct 7, 2013
2
0
Males who evolve in male-dominated populations become far better at securing females than those who grow up in monogamous populations, according to new research into the behaviour of fruit flies at the University of Sheffield.
Plants & Animals
May 5, 2016
1
324
Most people probably think of sperm as the microscopic tadpole-like things wriggling around in human semen. But there is an astonishing amount of diversity in the size, shape and number of sperm produced by male animals. ...
Plants & Animals
Nov 19, 2015
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75
The presence of a rival male affects sperm quality, according to a research study led by the University of Alicante and the University of Upsala (Sweden). The work was carried out with adult zebrafish (Danio rerio) and reveals ...
Plants & Animals
Apr 12, 2019
0
27
In the animal kingdom, sperm usually are considerably smaller than eggs, which means that males can produce far more of them. Large numbers of tiny sperm can increase the probability of successful fertilization, especially ...
Plants & Animals
May 25, 2016
2
19
Male flour beetles increase their courtship effort and their sperm count if a female smells of other males according to a study published in the journal Behavioural Ecology.
Plants & Animals
Apr 28, 2015
1
58
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
0
0
(PhysOrg.com) -- Male physical competition, not attraction, was central in winning mates among human ancestors, according to a Penn State anthropologist.
Evolution
May 13, 2010
19
0
The average man experiences hormone changes similar to the passive bonobo prior to competition, but a "status-striving" man undergoes changes that mirror those found in a chimpanzee, say researchers from Duke and Harvard ...
Plants & Animals
Jun 28, 2010
1
0
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
2
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