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 ...
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.
Promiscuity could reduce benefits of successful mating, research shows.
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. ...
Strain of living with competitive males: Males age faster than females due to brawling in early adulthood
Male badgers that spend their youth fighting tend to age more quickly than their passive counterparts according to new research from the University of Exeter.
Male flour beetles increase their courtship effort and their sperm count if a female smells of other males
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.
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.
Common stereotypes would have us believe that men are more competitive and women more cooperative.
A team of researchers has discovered that changes in population density can affect the size of animals' testes and therefore impact on reproduction.
Glossy magazines and TV reality shows often portray males as the gender that strays and females as the gender that's picky.