Tag: "source" at biology news

Mosquito spray increases toxicity of pyrethroids in creek, study finds

...their way into creeks. "We don't know yet if the source is a product a homeowner would use, such as lawn insecticides or other outdoor insecticides, or if they may be coming from applications by professional pest controllers. We just know they are somehow finding their way to urban creeks," Weston said. ...

NASA study solves ocean plant mystery

...ate. This area of the ocean is the largest natural source of carbon dioxide to the atmosphere. "We concluded that nitrogen is the primary element missing for algae growth and photosynthesis in the northern portion of the tropical Pacific, while it was iron that was most lacking everywhere else," said Mich...

Value of services performed by insects tops $57 billion in US

...and other products; being used in medicine or as a source of food for animals other than those used in hunting, fishing and birding; and providing a direct source of food for humans. Based on their analysis, Losey and Vaughan call for greater investment in resea...

The critical importance of mangroves to ocean life

...nds--to determine that mangroves are indeed a main source of dissolved organic carbon in the open ocean. In total, they concluded that the carbon exported from mangroves is approximately 2.2 trillion moles of carbon per year [2.2 x 10(12), similar to the annual Amazon River discharge], nearly triple the amo...

Alaska seal pup diet may hold key to decline of population

...rt to energy and blubber. Herring is one potential source of fat for harbor seals, she said. After weaning, ...Seals rely on blubber both for insulation and as a source of energy. Nutritionally stressed adolescent females may take longer to reach sexual maturation and ...

Obese people are more sensitive to pain, suggests study

...and move the muscles in order to get away from the source of the pain. "This kind of evaluation is in some ways a more objective way of measuring the body's response to pain, as opposed to simply asking someone if they feel pain," Emery said. But the researchers did ask participants how much pain they fel...

Taipan venom no snake oil

... form of Factor X in their venom which is the only source of Factor X other than mammalian livers," he said.... Dr St Pierre said snake venom was a huge untapped source of potential drug therapies. His study is the most detailed ever conducted on the genes responsible...

Ancient fossil DNA found preserved in crystal

...ann Institute of Science recently discovered a new source of well-preserved ancient DNA in fossil bones. The...emy of Sciences (PNAS). Fossil DNA is a potential source of information on the evolution, population dynamics, migrations, diets and diseases of animals and ...

Contaminants linked to sturgeon decline in Columbia river

...gans and muscle tissue. "We don't know the exact source of contamination," Schreck said. "The fish move, t...ntury. The fish have always been an important food source for Oregon's Native Americans, and now as salmon runs diminish, white sturgeon fillets and steaks ar...

Restoring seagrass beds: Is it for the birds?

...s at the Dauphin Island Sea Lab see them as a rich source of phosphorus, a natural fertilizer for grassbeds which have been destroyed by boat propellers. Over the next couple of months, Sea Lab scientists Dr. Ken Heck and Dr. John Dindo will be setting out bird stakes in an effort to revive scarred grassbe...

UF scientists trace origin of shark's electric sense

..., which are common in vertebrate development, as a source of sharks' electrical ESP. It also fortifies the ..." But the idea that the neural crest truly is the source of the electrosensory system will raise eyebrows, scientists say. "It's a very interesting paper fo...

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

...t species are of the genus Alexandrium and are the source of the paralytic shellfish poisoning known as "red tide." A major red tide swept the New England coast in 2005, shutting down the clamming industry for weeks. What New Englanders call the "steamer, "long-neck," squirt clam," or "belly clam" ?o...

Worm hormone discovery may aid fight against parasitic disease

...rol and other signals derived from the worm's food source are required to launch the series of biochemical e... state, or by coaxing them to mature before a food source is available. Other UT Southwestern authors on the paper are lead author Daniel L. Motola, an M.D./...

Avian flu transmission to humans may be higher than thought

...s from flocks. "In addition to being an important source of income, poultry is kept by many rural households for subsistence farming. The current epidemic in poultry is thus not only a public health problem but also an economic drawback for the many Vietnamese who live in rural areas." The researchers no...

Macrophage signaling may affect hormone resistance in prostate tumors

...cells and immune cells called macrophages may be a source of inflammatory signals capable of impacting the e...t in prostate cancer, and whether this serves as a source of inflammatory signals capable of impacting the therapeutic effectiveness of androgen antagonists,"...

African amphibians make extreme parental sacrifice: The skin off their backs

...itious, and the young depend entirely on this food source for perhaps as long as four weeks, Nussbaum said. "This form of post-hatching parental care, in which the mother provides nutrition to her hatchlings via her skin, has never been seen before in amphibians, and may be unique among vertebrates to this...

'Genetic network' guards against lethal DNA damage

...enes will open the door to an extraordinarily rich source of new data on DNA damage, repair, and human diseases," Boeke added. ...

Evolutionary shifts in olfactory sensitivities in fruit flies

...upersensitive detection system for a specific food source and egg-laying environment. The findings are reported by researchers Teun Dekker, Irene Ibba, Purayil Siju, Marcus Stensmyr, and Bill S. Hansson of the Swedish University of Agricultural Sciences. Most insects rely on their olfactory system to dete...

Potential heart benefit found in stem cells

...the growth of cardiac muscle). To achieve CM, the source of the cells needs a high rate of cardiac activity...e in vitro data suggests that stem cells from this source have significant CM potential and are potentially valuable not only because they can be easily colle...

Scientists discover a genetic switch that links animal growth and cancer

...If these animals hatch from their eggs without any source of nutrition, they are able to remain in a perpetually young state for a long time without growing. When they eventually find food they start growing and maturing into adults. The researchers discovered that this juvenile-to-adult switch is controlle...

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