animal 2 2

Tag: "animal" at biology news

The mouflons of the Kerguelen archipelago

...c variety in a population. The environment of many animal and plant populations has been modified by human activity. In many cases, we are witnessing a loss of biodiversity. While scientists ask themselves about our impact on the genetic diversity of populations, this study by Denis Réale and his co-workers...

Turn-ons and turn-offs for neurons

...ip between gene activity, neuronal physiology, and animal behavior. Hence, this new research is an important step in both the development of highly reliable gene-switches for experimental neuroscience and in our understanding of mechanisms governing gene regulation in the brain. Indeed, the epigenetic mecha...

Male circumcision overstated as prevention tool against AIDS

...ing a stigma against the infected would be like an animal rights activist claiming that a rabid dog must be allowed to run free in a neighborhood regardless of how many men women and children he infected and killed. It is not surprising that computer models rarely show the virus reaching epidemic proport...

Understanding why C. difficile causes disease -- it's hungry

...ia are everywhere — in soil, air, water, human and animal feces, and on most surfaces in hospital wards. The bacteria don't cause problems until they grow in abnormally large numbers in the intestinal tract. This can happen when the benign bacteria that normally inhabit the intestinal tract are reduced such...

Definitive evidence found of a swimming dinosaur

...-shaped prints paint a picture of a large floating animal clawing the sediment as it swam in approximately 3.2 meters of water. Ripple marks on the surface of the site indicate the dinosaur was swimming against a current, struggling to maintain a straight path. "The dinosaur swam with alternating movemen...

Genome of Clostridium botulinum reveals the background to world's deadliest toxin

...r as a dormant spore or as a scavenger of decaying animal materials in the soil, and doesn’t interact with human or other large animal hosts for prolonged periods of time. Occasionally it gets into a living animal, via contaminated ...

Ants show us how to make super-highways

...his study provides rare quantitative evidence from animal societies that extreme specialisation by a minorit...ary history in the study of social organisation in animal societies....

New research shows sharks use their noses and bodies to locate smells

...dynamic, three-dimensional structures used by many animal species to locate food, mates, and home sites. How...e results are interesting for our understanding of animal navigation under water and for the development of guidance of autonomous underwater vehicles (AUVs)"...

New study suggests potential for a broadly-protective HIV vaccine

...mpted to elicit these broad-range antibodies in an animal model by immunizing with a particular HIV-1 surface protein, designated R2 gp140, and an immune response-boosting component. The researchers tested antibodies generated by the immunizations to determine their effectiveness in neutralizing the infecti...

Philandering female felines forgo fidelity

...ve more than one father. While promiscuity in the animal kingdom is generally a male thing, researchers for the Wildlife Conservation Society and the Zoological Society of London (ZSL) have found that, in cheetah society, it’s the female with the wandering eye, as reported in a paper in the latest issue of...

Moths mimic sounds to survive

...the study is the first to definitively show how an animal species uses acoustic mimicry as a defensive strat...imental evidence for how mimicking sounds helps an animal survive....

Human stem cell treatment restores motor function in paralyzed rats

...stem cell therapy for safety and efficacy in other animal models, and hopes to move to clinical trials in humans by next year. Paraplegia from spinal cord ischemia is a serious complication that occurs in 20 to 40 percent of patients undergoing a surgical process called aortic cross-clamping. When th...

Scientists discover 5 new species of sea slugs from the Tropical Eastern Pacific

... Panama. The new species status and naming of this animal awaits the discovery of additional specimens....

A cherry on top: Tart cherries may alter heart/diabetes factors

...han just making pie, according to new data from an animal study conducted by University of Michigan Health System researchers and presented today at a major scientific meeting. In a study involving rats, the researchers report that animals that received powdered tart cherries in their diet had lower total...

'Personality-gene' makes songbirds curious

...f variation in personality in natural, free-living animal populations, it would help a lot to know the molecular genetic mechanisms behind the trait." Typing the behavioural relevant Drd4 polymorphism it should be possible to follow micro-evolutionary changes in populations, which would result from changing...

Gene malfunctions cause schizophrenia, depression symptoms in mice

... They said their findings in mice offer a possible animal model for developing treatments for schizophrenia and depression. Also, they said their findings support the theory that the two disorders share common genetic mechanisms. Steven Clapcote, David Porteous, John Roder, and colleagues reported their fi...

Amphibians in losing race with environmental change

... It has been estimated that the rate of plant and animal extinction is greater now than any known in the la... of aquatic systems is also more common. Many animal species lay their eggs communally or congregate socially, often to avoid predation or improve resour...

Global survey of lizards reveals greater abundance of animals on islands than on mainland ecosystems

... move to islands can strongly affect the sensitive animal communities on islands.? In addition to their in...extensive global study of island densities for any animal group. Analyzing these estimates, they determined that lizards were consistently more than ten times...

Scientists discover rare 'gene-for-gene' interaction that helps bacteria kill their host

...e gene in a pathogen targeting a single gene in an animal or human host have been identified so far. Photorhabdus is a family of bacteria that in relatively small concentrations can kill insects - between 10-100 cells of it are typically enough ?but most are harmless to humans and can be used as a biolog...

Vaccine prevents prion disease in mice

...o treatment or cure. The disease spreads when an animal eats the body parts of other animals contaminated with prions. The disease causes dementia and abnormal limb movements. Prion is a protein that is also an infectious agent. The proteins are so similar to proteins found normally that the immune sy...

1 2 3 4 5 6 7 8 9 10