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Tag: "behaviour" at biology news

Staphylococcus aureus hides out in cells

...ears related to its capability to adopt a discrete behaviour instead of actively duplicating,” says Patrice Francois, a Geneva-based member of the research team. “S. aureus then benefits from natural or programmed cell death to re-emerge and trigger another episode of infection, leading to chronicity.”...

The mouflons of the Kerguelen archipelago

...ire naturelle in Paris. He studied the ecology and behaviour of mammals (mouflons, sheep and reindeer) introduced into the Islands. Ten years later, Renaud Kaeuffer, a doctoral student in biology at UQAM, supervised jointly by Denis Réale and Dominique Pontier of the Université Claude Bernard Lyon I in Fran...

Ants show us how to make super-highways

... demonstrates that a simple but highly specialised behaviour performed by a minority of ant workers can improve... beautifully", explained Franks. Overall, this behaviour results in an increase in the average speed of prey-laden traffic. Moreover, calculations suggest th...

Mule deer moms rescue other fawns

...d then stayed safely outside that distance. The behaviour of mule deer defies traditional explanations that parental care, kin selection or reciprocity play a part in the defence of fawns other than their own. But while the study's findings seem to point to mule deer as superior mothers, the motivation for ...

'Personality-gene' makes songbirds curious

...e are simply too many factors that influence human behaviour and these factors are hard to control experimental...amine receptor D4 gene show a stronger exploratory behaviour than individuals with other variants (Proceedings of the Royal Society London B, 2 May 2007). The...

Survival of the rarest: Fruit flies shed light on the evolution of behavior

...discovered that a single gene affects the foraging behaviour of fruit flies, has identified the benefit of rarity in populations of fruit flies with two different versions of the foraging gene. This gene is of particular interest because it is also found in many organisms, including humans. The new study appea...

Toxoplasmosis infection trick revealed by scientists

...ctroscopy and cellular studies to characterise the behaviour and interactions of the parasite protein and host cell sugars. This means that the team have a more detailed picture than ever before of exactly how the parasite recognises and attacks host cells in the body. Professor Steve Matthews from Imperia...

Flies don't buzz about aimlessly!

...pear to be the first reported example of searching behaviour that is both scale-free and intermittent. This sug...ests a unified theory for one of the most critical behaviour animals exhibit ?foraging for food." The next step will be toward integrating these results with ...

University of Alberta researchers unravel intricate animal patterns

...and therefore, we may assume that in this case the behaviour of an individual will be influenced by the signals...ulations. Or we can think about the anti-predatory behaviour exhibited by some schools of fish--when a predator is nearby, the school contracts in a tight aggreg...

The chimpanzee stone age

...go. The result suggests chimpanzees developed this behaviour on their own, or even that stone tool use was a tr...e use of locally available resources. Nut cracking behaviour in chimpanzees is transmitted socially, and the new discoveries presented in this study shows that s...

Rewarding fat rats

...ots that can learn from experience and adapt their behaviour to a complex, constantly changing environment. We can expect that this technology will be greatly improved in the near future." ...

A healthier start to a pig's life

...Sciences University at Alnarp, Sweden, studied pig behaviour and the practical application of lectin in Swedish pig production. Professor Pierzynowski feels that being part of a EUREKA project has been invaluable in making contacts in other countries and in raising the profile of the project....

Anti-herpes treatment reduces HIV levels in women infected with both viruses

...owledge does not necessarily translate into sexual behaviour change. Therefore, innovative methods that target the biological susceptibility of individuals to acquire or transmit HIV are also required. A number of options to prevent HIV transmission are currently being investigated, including the role of vagin...

New evidence of 'human' culture among primates

...e act of stone-banging as "a remarkable and novel" behaviour which has yet to be observed in any other non-huma...emerges, it is hoped the ancient ancestry of human behaviour will become clear. ...

Turtles are loyal in feeding as well as in breeding

...hese findings give us a much better picture of the behaviour of adult turtles at sea, where they spend the majo...as is unclear. Scientists do not yet know why this behaviour has evolved, but it is possible that sea turtles are territorial or are responding to limited food r...

Birds found to plan for the future

... eventualities. The western scrub-jays demonstrate behaviour that shows they are concerned both about guarding against food shortages and maximising the variety of their diets. It suggests they have advanced and complex thought processes as they have a sophisticated concept of past, present and future and fact...

Baby fish 'smell their way home'

...timuli, including distant noise off a reef and the behaviour of other fish, but the team concluded that smell was probably the dominant factor leading the babies home. "Every reef gives off its own unique chemical signature, a rich mixture of the proteins and amino acids emitted by corals, all the plankton ...

How T lymphocytes attack

...tion of the tumour antigen determines T lymphocyte behaviour To arrive at their conclusion, the researchers ... all stages of development. However, T lymphocyte behaviour varied in antigen-containing tumour; when the tumour stopped growing because of the lymphocyte injec...

Salmonella survives better in stomach due to altered DNA

...ributes to knowledge about the characteristics and behaviour of this dangerous Salmonella....

A valuable fly for research into disease

...up focuses on the possible links between genes and behaviour caused by drug abuse and the mechanisms that regulate responses to psychostimulants such as alcohol, cocaine and nicotine. Drosophila is a key tool for studying certain aspects of cancer, and research into the development and proliferation of tumour...

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