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Tag: "behavior" at biology news

Primates take weather into account when searching for fruits

...ecent weather as a tool for guiding their foraging behavior when searching for ripening fruit. The work, which potentially informs our understanding of how cognitive skills developed in humans and other primates, is reported by Karline Janmaat, Richard Byrne, and Klaus Zuberbühler of the University of St. And...

Use of stone hammers sheds light on geographic patterns of chimpanzee tool use

...findings are significant because this nut-cracking behavior was previously known only in a distant chimpanzee ...overy, it was thought that chimpanzee nut-cracking behavior was confined to the region west of the N'Zo-Sassandra River in Cote d'Ivoire. Because there are no r...

Despite acidity, orange juice could still be a source of foodborne disease

... Orlando, Florida. "The more we find out about the behavior of microorganisms in non-potentially hazardous foods the more we are beginning to understand that some of these foods are borderline or not consistent with the definition," says Dr. Larry Beuchat of Center for Food Safety at the University of Georgia...

It's all in the genes

...cteristics of that individual but also dictate the behavior of thousands of other organisms in a community. They say these genes, in fact, influence the evolution of an entire ecosystem. "We're pushing a whole new field of research," said lead investigator Tom Whitham, Regents Professor of biological scien...

Adult stem cells are touchy-feely, need environmental clues

...h stem-cell use against diseases and for stem-cell behavior in embryonic development," Much of the work in stem-cell science has involved the study of the chemical microenvironment, the soup of chemical messenger signals that are generally thought to guide stem cells through the process of differentiation,...

First 'encyclopedia' of nuclear receptors reveals organisms' focus on sex, food

...nges in receptor activity helps explain the cyclic behavior of metabolism. This also suggests that the superfamily acts as a mega-network to influence metabolism, rather than in a series of independent signaling pathways. "Understanding timing patterns of receptors might help explain aspects of the out-of-...

Brain enzyme treatment relieves memory lapse in Alzheimer's mice

...ear was tested 24 hr later by measuring "freezing" behavior in response to the box or the auditory cue. Contex...ced levels of Uch-L1 showed a decrease in freezing behavior to 65% that of normal mice when placed in the box. The differences between treated and untreated mic...

Studies suggest new brain protein may help in treating schizophrenia, insomnia and anxiety

...sent a novel target for the treatment of psychotic behavior and schizophrenia, according to new research presented at the 6th International Congress of Neuroendocrinology (ICN 2006). ICN 2006 is being held at the David L. Lawrence Convention Center in Pittsburgh June 19 ?22. Neuropeptide S (NPS), so named by...

New HIV study identifies high-risk subgroups of adolescents

...blems. Prior studies have found that risky sexual behavior is often associated with mental health issues and ...gy. Researchers identified three patterns of risk behavior among 1,153 high-risk boys and three patterns among high-risk girls ages 15-21 in Atlanta, Miami, an...

Human behavior changes the number of strains of infectious diseases

...s take place one at a time), groups with different behavior favor strains with different properties," explain ...t determine which strains emerge, but human mixing behavior has a big part to play." ...

Neuronal cell cultures kept on the straight and narrow

...ST), may enable new, fundamental insights into the behavior of neuronal cells. Culturing particular types of cells in isolation is a basic technique for measuring how they respond to various stimuli, testing new drugs, and similar cell biology tasks. Neuronal cells, which make up the central nervous system i...

UAB researchers confirm HIV-1 originated in wild chimpanzees

...s will allow us to explore the natural history and behavior of SIVcpz in its natural host and help us begin to unravel how and why SIVcpz made the jump to humans." ...

Chimpanzees can transmit cultural behavior to multiple 'generations'

...ring knowledge through a chain of generations is a behavior not exclusive to humans, according to new findings...ve shown chimpanzees exhibit generational learning behavior similar to that in humans. Unlike previous findings that indicated chimpanzees simply conform to the...

Ritalin packs punch by elevating norepinephrine, suppressing nerve signal transmissions

...s the paradoxical effect of decreasing hyperactive behavior and increasing the ability to focus, even though it is a stimulant, said Barry Waterhouse, the study's senior author. "We're developing a series of behavioral and electrophysiological assays for examining the actions of drugs like methylphenidate," ...

New fruit fly protein illuminates circadian response to light

...p-wake cycle to the new light-dark schedule. "The behavior of the mutant flies is similar to that displayed in a person who has prolonged jetlag," notes Sehgal. In search of answers to the mutant's defective circadian response to light, Sehgal and colleagues looked to the molecular details of the clock cells...

Just the expectation of a mirthful laughter experience boosts endorphins 27 percent, HGH 87 percent

...don't want to bias what they do or watch. Time and behavior have proved me right with this approach," he added. Earlier experiments showed stress reduction Berk said the results of this "anticipatory mirthful laughter experience, which is a kind of eustress or 'positive/good stress' event, builds on our ...

Record bonefish

...out the Florida Keys to better understand bonefish behavior and migration patterns. As fishermen discover the tags on the fish they catch, they are instructed to measure and release the fish, note their whereabouts, and notify the program of the recapture via the phone number provided. This was the case on ...

Suicide risk does not increase when adults start using antidepressants, study finds

...ry. The study also found that the risk of suicidal behavior after starting 10 newer antidepressant medications...g Administration (FDA), which warned that suicidal behavior may emerge after treatment with the newer antidepressant drugs has begun. "Our findings show that,...

Underwater listening devices yield discoveries about endangered large whales

... scientific knowledge of the movements and calling behavior of these marine mammals. The findings have been particularly important in parts of the world, such as the seas near Alaska, where standard visual surveys are often hampered by darkness and bad weather. The article, by Sue E. Moore of the National Oc...

Evolution of 'irreducible complexity' explained

...ership of the hormone aldosterone, which regulates behavior and kidney function, along with the receptor protein that allows the body's cells to respond to the hormone. They resurrected the ancestral receptor gene ?which existed more than 450 million years ago, before the first animals with bones appeared on...

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