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Rhesus monkeys can assess the visual perspective of others when competing for food

Researchers Jonathan Flombaum and Dr. Laurie Santos, both from Yale University, have found that rhesus monkeys consider whether a competitor can or cannot see them when trying to steal food. Working with semi-free-ranging rhesus monkeys on the island of Cayo Santiago in Puerto Rico, Flombaum and Santos set up a food competition game: Lone monkeys were approached by two human "competitors....

Gambling monkeys give insight into neural machinery of risk

Duke University Medical Center neurobiologists have pinpointed circuitry in the brains of monkeys that assesses the level of risk in a given action. Their findings -- gained from experiments in which they gave the monkeys a chance to gamble to receive juice rewards -- could give insights into why humans compulsively engage in risky behaviors, including gambling, unsafe sex, drug use and overeatin...

Logging changed ecological balance for monkeys, damaged health

Twenty-eight years after intense selective logging stopped in the region now known as Uganda's Kibale National Park, the red-tailed guenon (Cercophithecus ascanius) is a primate still in decline. The logging practice, scientists report in a new study, changed the ecological balance for these monkeys, leading to behavioral changes and opening the door for multiple parasitic infections. The...

'Shifty-eyed' Monkeys Offer Window Into Brain's Social Reflexes

Neurobiologists at Duke University Medical Center have found the strongest evidence yet that monkeys show the same keen 'social reflexes' that humans do -- shifting their attention in response to the direction of gaze of another individual. The researchers said their findings mean that monkeys can provide a critically important animal model of how the brain controls what humans pay attention to i...

Monkeys understand numbers across senses

Monkeys can match the number of voices they hear to the number of faces they expect to see, Duke University scientists have found. The finding indicates that numerical perception is truly an abstract concept and not just a function of a particular sense, said the researchers. The experimental approach also will lead to further studies exploring whether human infants, before they have a verbal cap...

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Monkeys offer genetic clues to adult blindness

A genetic link between rhesus monkeys with macular degeneration and humans// could help treat blindness in older adults, reports science portal www.eurekalerts.org. Age-related macular degeneration is the leading cause of blindness in older adults, yet researchers are still in the dark about many factors that cause this incurable disease. William W. Dawson, professor of oph...

Urban Monkeys Source Of Virus Infections

Asian Urban monkeys may be a source of various pathogenic viruses and the transmission of these viruses to humans are high due to contacts of humans with monkeys. Researchers from University of Washington// have undergone a test of isolation of different viruses from 20 urban macaques and the test results showed that more than 10 macques harbored retroviruses. The results indicate that contact wi...

Monkeys Respond To HIV Treatment

US based researchers are reported to identified two drugs meant for treating HIV patients also served to protect monkeys from contracting the AIDS virus. // As to whether the same can be applied to human beings also has not yet been confirmed, even though it may be possible. Rhesus monkeys were experimented upon by the Centers for Disease and Prevention’s Dr. Walid Heneine, through i...

Drug Company Admits Knowledge Of Side Effects In Monkeys

TeGenero, a German based drug firm that had manufactured TGN-1412, has now admitted that the drug had showed adverse effects//, when tested on monkeys. Four out of the six who were admitted to the intensive care unit of a London based hospital following the drug administration are recovering, according to official reports. The controversial clinical trial had been conducted at Northwi...

HIV Vaccine for Monkeys Increases Survival Rates

Novel studies, courtesy The National Institute of Allergy and Infectious Diseases (NIAID), suggest that even though a HIV vaccine may not offer the intended //protection against infection, yet it does offer a distinct survival edge for those vaccinated. Such a survival advantage was observed in monkey studies conducted by two teams of researchers, one led by Norman L. Letvin, M.D., of...

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