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Tag: "behaviour" at biology news

HIV decline in Zimbabwe linked to behavioural change

...ternational research team believes that changes in behaviour among the population have accelerated the recent decline in HIV infection in Eastern Zimbabwe. Research published today in Science shows how there has been an almost 50 percent decline in HIV prevalence in some groups, which the researchers attribut...

Faults in newly discovered breast stem cells may lead to tumours

... cells that are dividing rapidly, which is typical behaviour of cancer cells. But an errant stem-like cell may be more resistant to chemotherapy because it divides more slowly. So while chemotherapy can eliminate the bulk of cancer cells, the tumour factory itself ?a breast cancer stem cell ?may survive months...

First demonstration of 'teaching' in non-human animals

...has been recognised in any non-human animal. This behaviour indicates that it could be the value of informatio...our, an individual is a teacher if it modifies its behaviour in the presence of a naïve observer, at some initial cost to itself, in order to set an example so t...

Intimate kissing quadruples risk of meningitis in teenagers

...disease in adolescence, say the authors. Although behaviour based health promotion messages might have a small role in reducing the risk of disease, such campaigns are unlikely to have a major impact. The development of further effective meningococcal vaccines therefore remains a key public health priority, t...

Researchers test new way to quit smoking

... smoke-free easier because a crucial part of their behaviour has already changed. "Another theory is that the combination of cigarettes with an additional source of nicotine 'saturates' the brain nicotine receptors. Individuals might lose some of their desire for cigarettes before trying to completely give th...

Attractive birds more immune against bird flu

...ance and why the choice of a mate is influenced by behaviour and appearance features that cannot reasonably be thought to have any usefulness. Therefore, they have begun to look more and more at the genetics behind what are called secondary sexual characters, such as the tail of a peacock, the stripes of the f...

Born with a love of speech

...ir sucking behaviour. "The neonates changed their behaviour to elicit speech," says Dr. Vouloumanos. "What we found is that their sucking behaviour increased to hear speech and it decreased when the sucking would elicit the non-speech sounds." Th...

Growing crops to cope with climate change

...erstanding how plants have adapted their flowering behaviour to different environments. The John Innes Centre researchers have discovered that the Ppd-H1 gene in barley controls the timing of the activity of another gene called CO. When the length of the day is long enough CO activates one of the key genes th...

Spring migration of pink-footed geese under threat

...cause the geese will not have time to adjust their behaviour to their dramatically changed environment. We are already seeing signs of decreasing annual breeding success and decreased summer survival as a result of poor body condition when the geese depart from the spring staging areas. Our model shows that na...

Male rivalry increases when females at most fertile, say researchers

...st fertile. What is interesting here is that male behaviour is determined by that of the females; men become more wary of masculine-looking men only when the females facial preferences begin to shift prior to ovulation. "Face shape and structure are good indicators of dominance. Men with large eyes, rounde...

Parents need to be educated about HPV vaccinations for daughters

...construed as a green light for sexually permissive behaviour ?rather, it is an effective means of preventing HPV infection when young women are most susceptible in their teenage and young adult years. "The origins of cervical cancer lie in HPV infection of the cervix, a sexually transmitted infection most fre...

MRSA use amoeba to spread, new research shows

... ways this may reflect how this kind of pathogenic behaviour first evolved. A good example is the bacterium that causes legionnaires disease. Probably it was pathogenic long before humans and other animals arrived on the evolutionary scene. Even today, it has no known animal host". "The most likely reason i...

Bees solve complex colour puzzles

...ystem (natural or artificial) can construct useful behaviour from ambiguous sensory information. 'One long-term aim of our research is to exploit this understanding to build seeing robots that, like the bee with its mere one million neurons, can learn to find a simple flower in a meadow, which no machine can...

Viagra's hidden help for wildlife

...nt for impotence. "This was in contrast to their behaviour with the other three ailments - arthritis, indigestion and gout, where the men were more likely to be current users of a TCM treatment than a Western treatment.". These findings stand in contrast to prior research suggesting a mistrust of Western m...

Earliest European Farmers Left Little Genetic Mark On Modern Europe

...decreased in certain countries and that changes in behaviour to prevent infection—such as increased use of condoms, delay of first sexual experience and fewer sexual partners—have played a key part in these declines. The new UN report also indicates, however, that overall trends in HIV transmission are still i...

2005 AIDS figures released by WHO and UNAIDS

...decreased in certain countries and that changes in behaviour to prevent infection—such as increased use of condoms, delay of first sexual experience and fewer sexual partners—have played a key part in these declines. The new UN report also indicates, however, that overall trends in HIV transmission are still i...

Breath of the dragon: ERS-2 and Envisat reveal impact of economic growth on China's air quality

...vels have risen by around 50% since 1996, and this behaviour is continuing." Space-based sensors are the only way to carry out effective global and regional monitoring of the atmosphere. While GOME demonstrated the first satellite sensitivity to tropospheric nitrogen dioxide, SCIAMACHY possesses superior per...

Discovery that bacterium is phosphate gourmet key clue to what makes it most social of bacteria

...nt or not, and it even has methods of policing the behaviour of individual bacteria that to try to "cheat" in the collective activity of the group. Now Dr David Whitworth from the Biological Sciences Department of the University of Warwick has also discovered that it appears to seek out and consume phosphate i...

Mosquitoes are more attracted to individuals infected with malaria

...wn that the parasite itself manipulates the biting behaviour of the mosquito vector when it is ready for a new host. Such manipulation could have a profound effect on the epidemiology of disease and, if it is not considered, could lead to severe biases in the estimates of the intensity of malaria transmission....

World-first technology enables study of ancient bacteria

...the Bermuda Triangle by finding out more about the behaviour of the mysterious hydrates. One theory now suggests that when the covering of "methane ice" which exists over much of the seabed of the Bermuda Triangle becomes unstable; this causes instability of the sea and an explosive mixture of air and methane...

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