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Tag: "environment" at biology news

Hyena mothers give their cubs a helpful dose of hormones

...lex integration of genetics, physiology and social environment leads to reproductive success for this species." Wolff believes that Holekamp's work will create a paradigm shift in how scientists view the establishment of dominance in mammals. ...

Sustainable farm practices improve Third World food production

...oncludes that sustainable agriculture protects the environment in these countries while substantially improving the lives of farmers who adopt the resource-conserving practices. Yields increased by an average of 79 percent during the study, according to corresponding author Jules Pretty of the University of Ess...

Evolutionary biology research techniques predict cancer

...e mutations, some adapt particularly well to their environment and prosper. It happens in marine sediments, mountain forests ?and, as a new study illustrates, in precancerous tumors, too. In a study published online today in Nature Genetics, Carlo Maley, Ph.D., a researcher at The Wistar Institute, and his coll...

A link is found between morphine addiction and the tendency to explore

...ering animals that persistently explored their new environment had a preference for being administered morphine. It was also observed that other personality characteristics in the rats, such as anxiousness or fear, are unrelated to morphine addiction. This is the first time a relationship has been observed betwe...

Researchers create pigs that produce heart-healthy omega-3 fatty acids

...e mutations, some adapt particularly well to their environment and prosper. It happens in marine sediments, mountain forests ?and, as a new study illustrates, in precancerous tumors, too. In a study published online today in Nature Genetics, Carlo Maley, Ph.D., a researcher at The Wistar Institute, and his coll...

Scientists discover interplay between genes and viruses in tiny ocean plankton

...st organisms show genetic variation related to the environment in which they exist," said Philip Taylor, director of the National Science Foundation (NSF)'s biological oceanography program, which funded the research. In addition to NSF, support for the research came from the Gordon and Betty Moore Foundation an...

Marine mammals are on the frontline of failing ocean health

...bout things like how much cat feces gets in to the environment - how what we dump on our lawns and sidewalks flows into streams to rivers and into the ocean," says Conrad. But with the discovery that otters in areas with heavy freshwater outflow are nearly three times as likely to be infected with Toxoplasma, ...

There's something fishy about human brain evolution

...ar-round, accessible and rich food supply. Such an environment was found in the wetlands and river and lake shorelines that dominated east Africa's prehistoric Rift Valley in which early humans evolved. Dr. Cunnane points to the table scrap fossil evidence collected by his symposium co-organizer Dr. Kathy Stewa...

Ocean virus identified in human blood samples

...hellfish and other species. In general, the marine environment is "a relatively under-explored potential reservoir of human pathogens," the researchers said in their study. History suggests these viruses have rarely been confined to the ocean. A costly Vesivirus epidemic in hogs first was identified in 1932, an...

Environmental metagenomics diagnosing extreme environments, tapping opportunities for clean energy

...cting the technology of DNA sequencing to scan the environment for processes that will lead to cheaper and easier...d interpreting the DNA extracted directly from the environment in question, an informative window opens onto that important and underutilized portion of the biosph...

Mechanism for memory revealed in neurons of electric fish

...reich discharge electrical signals to survey their environment and communicate with each other. "Every time they discharge, it's kind of like they are opening their eyes and closing them," says Zakon. "Each pulse of electricity is a snapshot of the environment. These guys are swimming around and discharging at...

'Executive' monkeys influenced by other executives, not subordinates

...d, "It seemed reasonable to me that in the natural environment monkeys would preferentially follow some individuals' gaze and not others. High-status monkeys, for example, do more to determine where the group is going to go. So there's more information to be gleaned by finding out where high-status individuals a...

CU, USDA team to curb two invasive, poisonous vines

...allow-worts release chemicals that make an optimal environment for certain mycorrhizal fungi," said DiTommaso. Through the altered soil, or possibly because of chemicals directly released by the swallow-worts, other plant species have a hard time establishing themselves wherever swallow-worts grow, DiTommaso sa...

Next good dinosaur news likely to come from small packages

...trom's students found that a protein in bone in an environment void of oxygen (say, if it's been resting in a swamp) can last for 200 hours at temperatures of 100 degrees Celsius. "If we have a protein sequence from bone, we can tell if the material is an original part of the organism that will provide interes...

Researchers use dirt to stay one step ahead of antibiotic resistance

...other environmental sources. "By evolving in an environment of antibiotic production, incredibly resilient bacteria must develop diverse ways to survive or resist the toxic antimicrobial compounds produced by their neighbors," said Wright. "Their coping tactics may be able to give us a glimpse into the future...

Warbling whales speak a language all their own

...plex way," said Suzuki. "Given that the underwater environment is very different from our world, it is not surprising that they would communicate in rather a different way from land mammals." The structure of the humpback whale song is repetitive and rigid. The whales repeat unique phrases made up of short and ...

Growing crops to cope with climate change

...er to select variations that will thrive in the UK environment but will also flower earlier, coping with hotter summers. Dr Laurie commented, "Although our research has been on barley we know from observation that other crops show similar variation in the way they respond to the lengthening of the day in sprin...

Born with a love of speech

...anos, the best evidence indicates that the uterine environment acts as a low-pass filter. This means that only very low, deep sounds ?those below about 400 Hertz ?make it to a fetus' ear. Dr. Vouloumanos and colleagues developed a painstaking two part experimental procedure to separate out possible in-utero exp...

Ancient DNA provides clues to the evolution of social behavior

...ation is the toolkit for dealing with whatever the environment has to throw at you. If you have only a couple of tools, you don't have a lot of resilience for dealing with an unexpected event.'' According to Chan, the evolution of the colonial tuco-tuco's social behavior may be linked to the population bottlene...

'Nano-keys' bind cell receptors and trigger allergic reactions

...st cells to form receptor complexes that sense the environment and sensitize the cell to allergens, which are sub...r clustering that allow cells to sense their outer environment and start cellular processes within the cell. The so-called nano-keys are surfaces of silicon with ...

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