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Tag: "behavior" at biology news

Scientists identify prion's infectious secret

... the prion could infect. Additionally, the prion’s behavior could be altered by subtle alterations in the reco...t is activated, in turn influencing the downstream behavior of the prion. "These findings are remarkable for two reasons," says Lindquist, who is also an inv...

Sleepless for science: Flies show link between sleep, immune system in Stanford study

...le for the changes seen in the sick flies. But the behavior of the ill flies looked a lot like that of flies known to have disruptions in their genes controlling circadian rhythm. So the next step, after confirming that flies lost sleep when infected, was to ask the converse: when sleep is disrupted, does ...

Palau's coral reefs show differential habitat recovery following the 1998 bleaching event

...the recovery rate of coral reefs by adapting human behavior and reducing local pressure on reefs; this research provides encouragement and incentive for local management. "Clearly, action is required at both ends of the political spectrum ?both globally to reduce greenhouse emissions, but als...

Female-led infanticide in wild chimpanzees

...ale trait. An exception in the realm of chimpanzee behavior was famously noted in the 1970s by Jane Goodall in...bsence of significant additional evidence for such behavior among female chimpanzees, speculation had been that female-led infanticide represented pathological ...

Dinosaur hearing, listening to muscle noise, quieter cubicles

...s presentation, attendees will hear the acoustical behavior of a pipe organ in a very large room (3aAA5). Jac...ecome more vocal. Learning more about the foraging behavior of transients is important for understanding their important roles in the marine ecosystem. To incr...

New study examines 'brain's own marijuana'

...oid -- in the regulation of stress, stress-related behavior and anxiety. A five-year, $1.7 million grant from...e the relationships between stress, stress-related behavior and addiction using a combination of electrophysiological, pharmacological and neurochemical approac...

Do fruit flies have free will?

...a complex brain." Using a combination of automated behavior recording and sophisticated mathematical analyses,...mpts have no effect. Thus lacking any input, their behavior should resemble random noise, similar to a radio tuned between stations. However, the analysis showe...

Growing nerve cells in 3-D dramatically affects gene expression

...ut differently. Studies indeed show differences in behavior between cells cultured in 2-D and in 3-D. Cells cultured in 3-D, for example, grow faster. Hoffman-Kim, an assistant professor of medical science and engineering at Brown, wants to find a way to repair damaged nerve tissue. To get there, she needs...

Fast and slow -- How the spinal cord controls the speed of movement

...ph Fetcho, a Cornell professor of neurobiology and behavior and an author of the study. "Now that we know the pattern, we can begin to ask how that changes in disease states." David McLean, Cornell postdoctoral researcher in Fetcho’s laboratory, was the first person to discover the pattern of neural activat...

Man's best friend lends insight into human evolution

...e eye gaze and face orientation to monitor others' behavior or infer motives of other subordinate or dominant individuals, or even deceive them, when competing for food. But it turns out that chimps are not very good at drawing inferences about others' mental states in cooperative situations ?such as when an ...

NIDA study identifies genes that might help some people abstain from smoking

...s able to successfully quit the cigarette- smoking behavior and one that was not. “We identified 221 genes that distinguished successful quitters from those who were unsuccessful,?says Dr. Uhl. “We know the functions of about 187 of these genes, but 34 have functions that are unknown at present. We also fo...

In young mice, gregariousness seems to reside in the genes

...f primates, according to scientific gospel, social behavior is dictated primarily by competition for resources...d sexual maturity, the genetic influence on social behavior ebbed and the animals became much more responsive to social cues such as gender, according to Lahvis...

Risk of HIV transmission highest early in infection

...be able to counsel them to modify high-risk sexual behavior and desist from transmitting the virus.? He suggested the development of affordable tests such as polymerase chain reaction assays to directly monitor the presence of the virus, instead of relying on the current method of antibody screening. In ...

Brain's reward circuit activity ebbs and flows with a woman's hormonal cycle

...that regulates emotion and reward-related planning behavior more during the pre-ovulation phase (four to eight days after their period began) than in the post-ovulatory phase. When they hit the jackpot and actually won a reward, women in the pre-ovulatory phase activated the striatum and circuit areas lin...

Good behavior, religiousness may be genetic

...rnal of Personality shows that selfless and social behavior is not purely a product of environment, specifically religious environment. After studying the behavior of adult twins, researchers found that, while altruistic behavior and religiousness tended to appear...

Researchers identify gene involved in dog size

...all of what we learn from studying body structure, behavior and disease susceptibility in dogs helps us understand some aspect of human health and biology.? In addition to Ostrander and her colleagues at NHGRI, the team included researchers from Cornell University in Ithaca, N.Y.; the University of Utah in ...

Nanotextured implant materials: blending in, not fighting back

...nostructured implants in live animals. If the same behavior holds true for materials placed in the body, the rapid growth of endothelial cells would help the implants to integrate quickly into existing blood vessels, provoking less immune response and a longer-lasting repair. ...

Tracking sperm whales and jumbo squid

...eries (MEPS), raise new questions about the diving behavior of both species. "Sperm whales (Physeter macroc...said. "We also know relatively little about the behavior of jumbo squid in the wild," Gilly added. "For example, it was only a couple of years ago that we di...

Woman's Day and For Womens of Science

...uman activities today. Little is known about the behavior of mercury in marine ecosystems and methylmercury in marine fish, the ingestion of which is the primary way most people at all levels of society worldwide are exposed to this highly toxic form of mercury. Methylmercury exposure now constitutes a pu...

Mercury contamination of fish warrants worldwide public warning

...uman activities today. Little is known about the behavior of mercury in marine ecosystems and methylmercury in marine fish, the ingestion of which is the primary way most people at all levels of society worldwide are exposed to this highly toxic form of mercury. Methylmercury exposure now constitutes a pu...

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