Sentences with phrase «by rival males»

This study comes to a surprising conclusion: Humans and other primates may stay together to keep their babies from being killed by rival males.

Substances produced by rival male social insects destroy sperm, and females produce compounds to counteract sperm loss.

Not exact matches

Male sports fans might roll their eyes at Nike chief Phil Knight's statement that Hamm's transcendence is rivaled only by that of Jordan and Tiger Woods, but there's no doubt that she's a Madison Avenue dynamo.

Footage broadcast by National Geographic showed a male penguin attacking a love rival, leaving them both bloodied and battered.

In some social insects, the males have just one chance to impregnate their queen — which they also use to spoil their rivals» chances by killing off their sperm.

Was it spite that led a male baboon called Nick to take revenge on a rival by urinating on her?

Male cuttlefish adopt female coloring, patterns, and shape — to mate surreptitiously with females guarded by larger rivals.

Typically, copulating males are disturbed by one to four rivals.

They claim that when girls are free from interpersonal pressures brought on by boys in the classroom, they are able to concentrate on math and science and as a result rival their male counterparts in these subjects.

A study suggests that monogamy evolved because it protects babies from being killed by male rivals.

In a series of follow up experiments, the authors found that the increase in sperm motility when mixing ejaculates was induced by the seminal fluid of rival males, not by their sperm, and that a similar increase could also be induced by mixing sperm with the reproductive tract fluid of queens.

Males compete over territory and mates by swivelling around and grappling one another using their barbed hind legs in an attempt to wrestle and kick their rival off the cactus pad arena.

She had witnessed male langurs attacking infants sired by rivals and leaving them for dead to clear the way for impregnating females with their own genes.

Female baboons try and get around this by being as promiscuous as possible to confuse the paternal identity — so males find it harder to tell if they are killing a rival's offspring or their own,» added Dr Carter.

DVD Review by Kam Williams Headline: Genderbent Comedy Makes the Most of Two Males as Ice Skating Partners World - class figure skaters Chazz Michael Michaels (Will Ferrell) and Jimmy MacElroy (Jon Heder) are not only arch rivals but also have polar opposite personalities.

Such are the cases with «Adult Beginners,» helmed by Ross Katz, whose «Taking Chance» deals with a lieutenant colonel who takes on a greater appreciation of the sacrifices of our soldiers in the Iraq war and written by a husband - wife team whose comedy «Blades of Glory» focuses on two male figure skating rivals.

A study suggests that monogamy evolved because it protects babies from being killed by male rivals.