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Tag: "primate" at biology news

Rhesus monkeys in Nepal may provide new alternative for HIV/AIDS research

...w fever, and represent one of the most widely used primate models for AIDS-related research. India, however,... to assist our collaborators in creating the first primate research center in Nepal and to help address some of Nepal's most pressing health concerns that incl...

Study suggests evolutionary link between diet, brain size in orangutans

... on several varieties of orangutans, an endangered primate closely related to humans. Members of the orang species inhabiting Sumatra, called Pongo abelii, live in the island's most favored environment, where soils are best for growing the fruits they most like to eat. "They'll eat fruits as often as they ...

Singing for survival

...case of acoustic sophistication and versatility in primate communication. Our study has demonstrated that g...d shed light on when this ability developed in the primate lineage." ...

Humpback whales have brain cells also found in humans

... hominids." The authors conclude: "Cetacean and primate brains may be considered as evolutionary alternatives in neurobiological complexity and as such, it would be compelling to investigate how many convergent cognitive and behavioral features result from largely dissimilar neocortical organization betwe...

Parkinson's mutation stunts neurons

...es of introducing the mutated gene could lead to a primate model for the form of PD. "These cellular and animal models may promote the discovery of effective therapeutics for LRRK2-associated disease," they wrote. ...

Male chimpanzees prefer mating with old females

...ween chimpanzee behavior and that of humans, their primate cousins. The basis for this difference may lie in the fact that whereas chimpanzees participate in a relatively promiscuous mating system, humans form unusually long-term mating bonds, thereby making young females more valuable as mates with greater ...

HIV gets a makeover

...eagues maneuvered around the intrinsic immunity of primate cells by replacing just a few parts of the human v...al by about 10 percent, but can effectively infect primate cells and be used to test potential therapies. "If we can make this virus work in animals the way it...

Ancient ape ruled out of man's ancestral line

...le researchers to show how well adapted this early primate was to walking on two feet.? But the sediment encasing Little Foot is harder than the bone ?making extracting him a painstaking process for the South African team. And Drs Latham and Cliff have now turned their own attention to further Australop...

American scientist's research of life's first cells

...died the function of short interspersed repeats in primate DNA. As a graduate student in Phillip D. Zamore's lab at the University of Massachusetts Medical School in Worcester, she characterized the RNA interference (RNAi) pathway in Drosophila and humans, and the therapeutic application of RNAi to diseas...

Road-crossing in chimpanzees: A risky business

In a finding that broadens our understanding of primate cooperation, researchers have found that chimpanzees evaluate risk when crossing roads and draw on an evolutionarily old principle--shared with at least some other primates--of protective "socio-spatial" organization that produces flexible, adaptive,...

Neuron cell stickiness may hold key to evolution of the human brain

...y the human brain evolved beyond the brains of our primate relatives. In a study comparing the genomes of humans, chimpanzees, mice and other vertebrates, researchers at the U.S. Department of Energy's Lawrence Berkeley National Laboratory (Berkeley Lab) and Joint Genome Institute (JGI) found a strikingly hi...

New evidence of 'human' culture among primates

...hich has yet to be observed in any other non-human primate species. But the real significance of his research...technology, adding to the archaeological record of primate behaviour. Most items used by primates in cases where they may be exhibiting socially-learned skills...

Making mice with enhanced color vision

...ience, also suggests that when the first ancestral primate inherited a new type of photoreceptor more than 40...ts that these knock-in mice mimic how our earliest primate ancestors acquired trichromatic vision, color vision based on three receptors. At some point in the...

Birth rate, competition are major players in hominid extinctions

... environment became patchy, many species including primate species became extinct. "While past primate populations moved with the forest, early hominid cultures 2.5 million years ago show signs of the ab...

Analysis of rhesus monkey genome uncovers genetic differences with humans, chimps

...urnal Science, the analysis reveals that the three primate species share about 93 percent of their DNA, yet h...an (Homo sapiens) and chimp (Pan troglodytes), the primate most closely related to humans. Four companion papers that relied on the rhesus sequence also appear...

The quest for an effective HIV vaccine presents new possibilities, challenges

... have some benefits, say the authors. In non-human primate models of HIV infection, T-cell vaccines have reportedly decreased the total amount of virus produced during early infection, caused a reduction in virus levels following the acute stage of infection, or produced some combination of these effects. In...

Female-led infanticide in wild chimpanzees

...Cell Press. Infanticide is known to occur in many primate species, but is generally thought of as a male trait. An exception in the realm of chimpanzee behavior was famously noted in the 1970s by Jane Goodall in her observations of Passion and Pom, a mother-daughter duo who cooperated in the killing and can...

Gene mutation linked to cognition is found only in humans

... contribute to the splicing pattern changes during primate evolution, suggesting a multi-step process eventually leading to the origin of the type II form in human," the authors state. They note that further studies should probe the biological function of type II neuropsin in humans, as the extra 45 amino...

Ancient retrovirus sheds light on modern pandemic

... Hutchinson Center. "However, we found that during primate evolution, this innate immunity to one virus may h...ans share many retroviral DNA fragments with their primate cousins. Such vestiges of primitive infection, rendered inactive by eons of genetic mutation, make u...

Reconstructing the biology of extinct species: A new approach

...am's leaders. The researchers studied 91 separate primate species, including all taxonomic families. The st... is a basic adaptation," says Walker, an expert in primate locomotion. "Now we have a way to reconstruct how extinct species moved that is completely independ...

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