Sentences with phrase «male chimpanzees»

Male chimpanzees fight their own battles, often relying on the support of other males.

Aggressive male chimpanzees who use their strength to sexually intimidate females sire more offspring than more passive males, a new study has found.

Male chimpanzees who bully and attack females more likely to successfully father babies with them, researchers find.

«We found that male chimpanzees showed higher object manipulation rates than females, but their object manipulation was dominated by play.

«Young male chimpanzees play more with objects, but do not become better tool users.»

Male chimpanzees stay with the group they were born into their entire lives, forging strong social bonds with other males.

The research has been published in the latest edition of Animal Behaviour titled Grooming decisions under structural despotism: the impact of social rank and bystanders among wild male chimpanzees.

Male chimpanzees use buttress drumming (shown in this video) as occasional punctuation to their more common pant hoot calls.

At the Arnhem Zoo in the Netherlands, for example, he watched male chimpanzees join forces for months to topple the highest - ranking male, females band together to protect each other from male aggression, and the whole colony dole out revenge when required.

As three hulking male chimpanzees and a dozen females loll below him, the renowned primatologist rejects the idea that war stems from «some sort of blind aggressive drive.»

A widespread belief that male chimpanzees trade meat for sex turns out to be baseless, suggesting that sexual bartering among humans may be a relatively recent phenomenon.

«In addition, high - ranking male chimpanzees are often immunosuppressed because they have high levels of testosterone and have been shown to have higher rates of parasitism.

«Man, last Friday I visited friends who didn't have a large male chimpanzee in their living room like we do at home.

You reported the rare killing of an alpha male chimpanzee in Tanzania by his underlings (9 March, p 16).

There is also the case of a male chimpanzee who had injured his fingers in a fight and hobbled around leaning on a bent wrist instead of his knuckles.

You could not parade your kid around a dominant male chimpanzee.

Not exact matches

Wonder Woman is one of the Superfriends; Ark II features a white Anglo - Saxon male (in charge), an Oriental, female, a Chicano male and a talking chimpanzee.

Female chimpanzees have sex with multiple males while ovulating, so a male that can produce more sperm has a better chance of dislodging other males» sperm and a better chance of his own sperm's survival.

In 2001, while studying chimpanzees in the Taï National Park in Ivory Coast as a Ph.D. student, Fabian Leendertz watched an alpha male named Leo vomit, climb up on a low branch, then topple over and die.

Over the last few decades, researchers in Africa have observed males in rival troops of chimpanzees raiding and killing (video) each other.

Chimpanzees, like most apes, live in male - dominated societies and use violence to maintain their social status and coerce females into mating.

Male mammals often compete with each other for females either by striving to be big and strong enough to monopolize one or more females (which is what gorillas do) or by striving to be sufficiently voluminous sperm producers to win sperm competition contests within females (which is what chimpanzees do).

Male bonobo chimpanzees employ a similar strategy, calling to nearby females when food is present, which boosts their chances of mating.

«The researchers have all these commitments to male dominance [as in chimpanzees], and yet bonobos have egalitarian relationships,» says De Waal.

Unlike other species of primates, such as chimpanzees or baboons (or, all too often, humans), where tensions run high between males and females, bonobo females are not afraid of males, and the sexes mingle peacefully.

HIV may have been associated with humans for hundreds of years rather than recently evolving from a chimpanzee virus, says a virologist from New Orleans after analysing tissue from a young male prostitute who died 30 years ago.

Soon all of the young chimpanzees in the colony were walking the same way in single file behind the unlucky male.

But male and female chimpanzees achieve social status in dramatically different ways, says a new study by primatologists at Duke University.

Unlike the more gregarious males, female chimpanzees tend to be loners, spending much time by themselves or with their own children.

Chimpanzees have a male - dominated society in which rank is a constant struggle and females with infants might face physical violence and even infanticide.

«Chimpanzee males usually have another individual they're very close with, and they may constantly battle for dominance, but they also have a larger, loose group of allies,» Benenson said.

In the incident, a female chimpanzee called Noel at Chimfunshi Wildlife Orphanage in northern Zambia sat down by the dead body of a young male, Thomas, whom she had previously adopted.

Despite the benefits of social status on their reproductive success — higher - ranking females appear to have access to better food and higher infant survival than their low - ranking counterparts — the tendency of female chimpanzees to «wait their turn» rather than fighting for rank reveals the competing priorities males and females face when ensuring the success of their offspring.

However, the pattern matches the social behaviors of chimpanzees, she says, where the males «interact [more] in groups with differently ranked individuals, and tolerate conflict more readily than females.»

The team used a new rating system to document these interactions, allowing them to determine the rank orders of male and female chimpanzees and watch how they shifted over time.

«Boy moms more social in chimpanzees: Watching adult males in action may help youngsters prepare.»

The researchers say that the apparent similarity between human children and young chimpanzees in the observed male bias in object manipulation, and manipulation during play in particular, may suggest that object play functions as motor skill practice for male - specific behaviours such as dominance displays, which sometimes involve the aimed throwing of objects, rather than purely to develop tool use skills.

In an earlier study at Gombe (Tanzania), immature female chimpanzees were also observed to pay closer attention to their mothers using tools and became proficient tool users at an earlier age than males.

While in adult wild chimpanzees it is females that are more avid and competent tool users, in juvenile chimpanzees the researchers conversely found it was the young males that spent more time manipulating objects, seemingly in preparation for adult tool use.

This is particularly true among extant Hominoidea, which show diverse patterns of variation (e.g., Plavcan, 2001); for instance, gorillas are polygynous species with strong sexual dimorphism due to intense male - male competition, whereas chimpanzees are promiscuous with definitively smaller sexual dimorphism.

So - called common (but extremely rare) chimpanzees (Pan troglodytes) live in male - dominated societies characterized by shifting allegiances and extreme violence.

By using human and chimpanzee Y chromosomes as a genetic fossil record to examine our past, scientists have seen a surprising difference in the way the male - making chromosomes from the two species...

Chimpanzee (Pan troglodytes) brain samples were collected postmortem from five adult specimens (23 Y female, 31 Y female, 31 Y male, 27 Y male, 23 Y male).

Representative Sample of Adult Chimpanzee 3.0 T MRI Scans (5 males, 5 females)- Chimpanzees were MRI scanned during their annual physical examinations following standard procedures designed to minimize stress.

In this paper, we discuss the proposed hypotheses and develop predictions for policing in chimpanzees, where conflicts often arise among females over access to food [28] or among males over access to females [29] and may result in severe dyadic or even polyadic agonistic interactions [10].

He fondly remembers watching an impressive and fearless high - ranking male, playful juveniles, and a chimpanzee in a patch of sunlight with a beatific look on its face.

«In chimpanzees, the highest - ranking male turns more red quite dramatically during a competition for primacy,» he explained.

During their fertility window, the genital area of our female primate relatives, including baboons, macaques, and chimpanzees turn scarlet, most likely to attract males.

Brett Morgen's Jane explores the life and legacy of Jane Goodall, following her determined mission to study chimpanzee behavior, despite being untrained and largely ridiculed by the male - dominated scientific community.

Chimpanzee males don't like the infants of other males, and will kill them.