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Tag: "border" at biology news

Map predicting spread of avian flu

... one in the south, close to the German and Belgian border (see attached figure). The authors suggest local control measures are unlikely to be able to halt an unfolding epidemic in these areas. The paper, published in the Open Access journal PLoS Computational Biology, arrives at these conclusions throu...

Amur leopard still on the brink of extinction, scientists say

...nd in the south-west Primorye region, close to the border between Russia, China and North Korea, were transected for the census and tracks left by the leopards in the snow were counted. Scientists were able to determine the number of the leopards by examining the shape, size and patterns of the tracks as we...

The influence of the menstrual cycle on the female brain

...en the reward is received. These results, at the border between neuroendocrinology and neurosciences, provide a better understanding of the fundamental role of gonadal steroid hormones on reward processing, particularly in behavioral processes such as motivation and learning. They also important in unders...

Invasive ants territorial when neighbors are not kin

...ections of the borders weekly. She estimated that border skirmishes around one of the smaller colonies, at Lake Hodges north of San Diego, killed at least 15 million workers over the six month study. However, ants did not fight when placed with ants from a distant location in the same supercolony. Coaut...

Wild tigers need cat food

...numbers in a protected area along the Laos-Vietnam border are severely depressed from commercial poaching, and prey depletion which may increase competition between large carnivores. "The good news is that given the chance, tigers can replenish their numbers; the bad news is that they are not being given...

Twenty Years of Malaria Research: Outcomes and Perspectives

...o in 1989, the largest of the refugee camps on the border of Thailand and Burma, where 9,000 Karen refugees from across the border were housed. The focus of the research was to study the efficacy of malaria drug treatments in pregn...

Loosen up, DNA: Leukemia gene changes genetic packaging

...n active area, and sometimes inserting it near the border between the two regions. The team used the gene that controls eye color to check whether a given stretch of DNA was on or not. If the fly's eyes were red, the gene was turned on; if the fly's eyes were white, the gene was turned off. In flies with ...

Virus has 'catastrophic' affect on red squirrels, research shows

...ally as it is now threatening to spread across the border to Scotland with severe consequences for red squirrel conservation there. He added: "We are not trying to wipe out the grey squirrel but as conservationists we have a duty to look after the red squirrel as it is a protected, native species. Small...

Researchers identify genes in fruitflies that may shed light on human cancer spread

...nes that are preferentially turned on in so-called border cells of the fruitfly ovary that migrate during no... its membrane surface and back again. "So-called border cell migration shares common characteristics with metastatic cancer cells," says Xuejiao Wang, M.D.,...

Vegetables inhibit growth of prostate cancer in mice with human tumors

...e ongoing use of these chemicals in countries that border the Pacific," Finkelstein said. The biggest current threat to albatross populations in the North Pacific is the longline fishing industry, which kills significant numbers of both black-footed and Laysan albatrosses. But the contaminants measured in...

Albatross study shows regional differences in ocean contamination

...e ongoing use of these chemicals in countries that border the Pacific," Finkelstein said. The biggest current threat to albatross populations in the North Pacific is the longline fishing industry, which kills significant numbers of both black-footed and Laysan albatrosses. But the contaminants measured in...

Tumor cells that border normal tissue are told to leave

...ected. "In a tumor, probably 99.99 percent of the border cells are raining out of the edges and dying," Cagan says. "But as oncologists have found, cancer stems from an accumulation of genetic mutations. If one of these wandering cells acquires a second mutation that prevents cell death, it could go on to ...

Potential heart benefit found in stem cells

...ocardium (cardiac muscle), and in two parts of the border zone. As predicted, the infarct areas of the he...limeters), and the same difference was seen in the border zones (11.2 vs. 8.6 mm). Capillary density in the border zones of the ADSC group was also significa...

Ancient DNA provides clues to the evolution of social behavior

...se owls have roosted in two caves near the Chilean border and regurgitated pellets of indigestible fur, bones and teeth while they rest. From these teeth, scientists can determine which rodent species lived in a roughly 3-mile radius of the cave at any given time. Using modern and ancient DNA from tuco-tuc...

HIV/AIDS rates in Tijuana, Mexico increasing at alarming rate

...1.2 million people located amidst the busiest land border crossing in the world. Data in this study suggest... "Intervention and prevention on both sides of the border are urgently needed, because of the high mobility between Tijuana and San Diego County," said Brouwe...

Wild birds help to create human flu vaccine

...enza outbreak in Kovsgol Province near the Russian border from the Mongolian Ministry of Food and Agriculture, which conducted preliminary testing from the wild birds. The highly pathogenic avian flu-H5N1 finding was confirmed by the United States Department of Agriculture's (USDA) Southeast Poultry Resea...

UF study first to quantify validity of DNA I.D. tool using marine snails

...top the spread of invasive species, Meyer said. "A border guard may come across some eggs or larvae in an orange shipment and wonder if they are from a dangerous fruit fly or something else to be concerned about," he said. For that matter, this ability to detect species in earlier stages of development cou...

Picky female frogs drive evolution of new species in less than 8,000 years

...rison, they looked at a second contact zone on the border between north and south, where frogs were not isolated from either lineage. "Reinforcement does not appear to occur at the more 'classic' contact between northern and southern lineages, and we speculate that this may be due to gene flow from the ext...

Bird samples from Mongolia confirmed as H5N1 avian flu

...enza outbreak in Kovsgol Province near the Russian border from the Mongolian Ministry of Food and Agriculture, which conducted preliminary testing of birds that died at Erkhel Lake. Their finding coincided with confirmations of cases of avian influenza in Russia and Kazakhstan. Karesh and Gilbert immediatel...

Fragment of yellow fever virus may hold key to safer vaccine

...ublic of Guinea in West Africa. Along the war-torn border with Sierra Leone, disruptions in vaccination and medical services led to a large epidemic in 2000. In collaboration with local health authorities, ter Meulen set up a viral hemorrhagic fever laboratory in Conakry to collect and evaluate blood sample...

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