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Tag: "losses" at biology news

Bone Density Recovers After Teens Stop Injected Contraceptive

...rs. Dr. Scholes explained that these bone density losses seen among the DMPA users occurred at a pace similar to those experienced by women progressing through menopause. Once the women stopped using DMPA, they experienced significant gains in bone density. The study authors wrote that the increase in bon...

Dead zone area in Gulf could be increasing, researchers say

...om low oxygen which can result in huge marine life losses ?has appeared much earlier this year, meaning it could be potentially larger in 2005 and affect marine life more adversely than normal, researchers are reporting. A team of scientists from Texas A&M University, Texas A&M at Galveston, Louisi...

Gambling monkeys give insight into neural machinery of risk

... big reward that obliterated any memory of all the losses that they would experience following that big reward," said Platt. Confident that they had developed a valid animal model that would reveal insights into the brain mechanism for assessing risk, the researchers next explored the neural circuitry that...

Crisis in African fish supplies looms, experts warn Africa leaders

...ket chains In many parts of Africa, post-harvest losses to spoilage due to inadequate landing, processing and trading sites exceed 30% of the catch. Weak market infrastructure in rural areas means most fish is still marketed as dried and/or smoked products. Investments to support small-scale businesses, ...

Leptin-signaling Protein Maintains Normal Body Weight And Energy Balance In Mice

...ket chains In many parts of Africa, post-harvest losses to spoilage due to inadequate landing, processing and trading sites exceed 30% of the catch. Weak market infrastructure in rural areas means most fish is still marketed as dried and/or smoked products. Investments to support small-scale businesses, ...

Primate virus jumps species barrier to humans for first time in Asia

...e species have already seen significant population losses because of infection by human illnesses. ...

Methamphetamine Abuse, HIV Infection Cause Changes in Brain Structure

... HIV infection is associated with prominent volume losses in the cerebral cortex (involved in higher thought, reasoning, and memory), basal ganglia, and hippocampus (involved in memory and learning). The scientists stress that among the recent methamphetamine abusers in the study, the degree of volume incr...

High carbon dioxide levels spur Southern pines to grow more needles

...nd untreated trees suffered dryness-related needle losses and less leaf growth. "This would imply that, eve...lized sites conversely suffered the highest needle losses under drought conditions. "They put out a lot of leaf area, but then they get hit very hard under wa...

Techniques available to detect soil that inhibits destructive soybean pest

...tween $800 million and $1 billion annually in crop losses in the United States, according the American Phytopathological Society. However, techniques are available to find soils that specifically suppress these microscopic roundworms, said Andreas Westphal, assistant professor of plant pathology. The female...

Chernobyl: The true scale of the accident

...s, soil invertebrates and mammals and reproductive losses in plants and animals were seen in high exposure a...an food, radiation monitoring, as well as indirect losses due to removing agricultural lands and forests from use and the closing of agriculture and industria...

Biotech cotton 8: Bugs 0

... insect pests of cotton in the Southwest. In 1995, losses from pink bollworm in Arizona cotton were estimate...ing the need for spraying. By 2004, pink bollworm losses had fallen to nearly half of earlier levels, $4.34 per acre. Tabashnik said, "Some of the other pes...

Storing carbon to combat global warming may cause other environmental problems, study suggests

...The question is also 'What are the other gains and losses for the environment?' We have to be smart about ou...average stream flow reductions of 38 percent, with losses increasing as the trees aged. Moreover, "13 percent of streams dried up completely for at least one ...

Biologists discover new pathway into plant cells

...round the world, and in some places can cause crop losses ranging up to 50 percent. These fungi produce multiple toxins that attack wheat plants, reducing yields and ruining wheat used as seed. In the United States, it's a particular problem in the Great Plains and Midwest. Ciuffetti has spent much of her c...

Red Tide causes sea turtle die-off in El Salvador

...n wild marine animal populations, massive economic losses to shellfish producers, and occasionally human deaths. While the algal blooms are a natural occurrence, human wastes such as run-off containing fertilizers and sewage from urban areas have been postulated as triggers for these events. ...

The Amazon in 2050: Implementing the law could save a million square kilometers of rainforest

...ive model of Amazon deforestation to assess forest losses within major watersheds, eco-regions, vegetation types, and the geographic ranges of 382 mammal species, two extreme scenarios were developed, encompassing the likely range of future trajectories of deforestation through 2050. The first of the two fu...

Virginia Tech helping to develop higher quality, disease-resistant wheat varieties

...st, and fusarium head blight result in significant losses in yield and quality each year. For example, researchers will be identifying and using DNA markers to select varieties possessing genes conferring durable resistant to powdery mildew, which causes annual crop loss of 10 to 30 percent in the Mid-Atla...

Less is more, gene study shows

...we humans lost some genes along the way, and those losses provided opportunities for changes that otherwise ...n evolution, and second, whether any of those gene losses was a good thing." Zhang's group started by scrutinizing a database of human pseudogenes---stretche...

Climate change drives widespread amphibian extinctions

...avoc on amphibians, and soon will cause staggering losses of biodiversity," he said. "The good news, if there is any, is the new findings will open up avenues of research that could provide scientists with the means to save the amphibians that still survive," said Bruce Young, a zoologist at NatureServe wh...

The diversity of marine life in the Gulf of Maine region is much greater than previously thought

...seline against which scientists can monitor future losses or introductions of species in the region as a result of climate change or other events, whether natural or induced by humans. Because the Gulf of Maine lies in an area that transitions from subpolar to temperate conditions, it and its creatures may...

Confidence in memory performance helps older adults remember

... both a precursor and a consequence of age-related losses in memory," says lead author Margie Lachman, profe...Lachman notes. "It's no surprise that age-related losses or lapses in memory can challenge our deeply embedded sense of control," says Lachman. "Thus, we fin...

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