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Tag: "winter" at biology news

For many insects, winter survival is in the genes

...is underscores the essential role of this gene for winter survival, suggesting that this particular heat-shock protein is a major contributor to cold tolerance in insects," Denlinger said. "It's highly likely that the other heat-shock proteins we found during diapause in the flesh fly are also important to ...

Study suggests some drug resistance to influenza B medications

...xtensively than anywhere else in the world. In the winter of 2004-2005, an influenza B virus caused a widespread epidemic in Japan, creating an opportunity to assess the effectiveness of neuraminidase inhibitors. The researchers collected influenza B isolates from 74 children before and after oseltamivir th...

How trees manage water in arid environments

...perature changes: the trees are largely dormant in winter and have a summer growing season. The mountain-top...season before the heavy rains, when almost all the winter precipitation had been evaporated and the soil was extremely dry, the trees essentially closed down,...

Saving endangered whales at no cost

...n as Lobster Fishing Area 34), which occurs over a winter fishing season, American-side lobster fishing is year-round, and involves 8? times more lobster traps in the water at any given time. Despite these significant differences in fishing "effort" and cost, Maine has only about 30% higher catches than the...

Bats prey on nocturnally migrating songbirds

...rica, whereas in spring only birds having survived winter mortality return to their breeding area. In addition, young birds in autumn may represent naïve, inexperienced, i.e. more vulnerable prey. The ability of giant noctules to prey on the wing upon nocturnally migrating passerines appears unique not ...

Custom-made cancer cell attacks

... infestation, because it is not cold enough in the winter to kill the beetles, and they are killing the forest.'' Achievable goals The president's target of 35 billion gallons of alternative fuels by 2017 ''is very substantive, but Bush did not provide any insights into what he is going to do to mak...

Cellulosic ethanol: Fuel of the future?

... infestation, because it is not cold enough in the winter to kill the beetles, and they are killing the forest.'' Achievable goals The president's target of 35 billion gallons of alternative fuels by 2017 ''is very substantive, but Bush did not provide any insights into what he is going to do to mak...

Turtles are loyal in feeding as well as in breeding

...e foraging grounds, moving to deeper water for the winter where they conducted dives of up to a record breaking 10.2 hours. Five females were also tracked when they nested again up to five years later and returned to the same foraging sites. Green turtles have been observed cropping sea grass gardens to ...

Vitamin D deficiency widespread during pregnancy

...oncentrations were highest in summer and lowest in winter and spring," said senior author James M. Roberts, ...D deficiency is more than three times as common in winter than in summer for all women of childbearing age in the United States. Even so, the Pittsburgh resea...

NASA snow data helps maintain nation's largest, oldest bison herd

... on snowpack distribution throughout Yellowstone's winter range areas. The snowpack model provides daily ...ry. The fact that they are moving to low-elevation winter ranges outside the park is actually a sign of how successful our restoration efforts have been," sai...

Air travel and flu: Post-9/11 restrictions delayed start of season

...res, influenza epidemics occur annually during the winter flu season. Given the concerns about global epidemics of serious strains of flu, such as occurred in 1918, as well as the more recent, localized outbreaks of 'bird flu', it is important to know more about how flu spreads round the world. Might airli...

Climate change creates dramatic decline in red-winged black bird population

...lantic Oscillation. The NAO is a dominant cause of winter climate variability in the North Atlantic region r...birds in order to track their nesting habits. They winter in southeastern United States. In mid-July they become gregarious and switch from eating insects to ...

New evidence of early horse domestication

... survive ice storms and don't need heated barns or winter fodder," Olsen said. They are, in fact, some of the last remaining large, Ice Age, Pleistocene mammals living in one of the last places on Earth where Pleistocene vegetation survives. Because they were domesticated, the horses supplied meat year-ro...

What animals can tell us about hemorrhage, organ transplants and aging

...uirrel briefly arouses from hibernation during the winter and its physiology has returned to normal. These findings could one day extend the time we can preserve organs for transplant and give doctors time to find a suitable recipient, Carey and Andrews said. The research could also profoundly change how ...

Melatonin improves mood in winter depression

...rring brain substance, can relieve the doldrums of winter depression, also known as seasonal affective disorder, or SAD. The study is publishing online this week in the Proceedings of the National Academy of Science. The study was led by Alfred Lewy, M.D., Ph.D., an internationally recognized pioneer in th...

Important gene controlling tree growth and development found

...owth and dormancy. This is a way to adopt to harsh winter conditions when the supply of water is low and the...rthern Sweden which stops growing and prepares for winter already when the days get shorter than 21 hours long. Trees from northern Norway can even display cr...

Scientists discover that ancient genes dictate flowering, fall bud set

...ompared to those from southern latitudes. Because winter arrives earlier at northern latitudes, trees need to set bud and enter dormancy earlier than trees at more southern latitudes. The article concludes that the CO and FT genetic pathway is key to understanding adaptation to climate change, as well as...

Where have all the butterflies gone?

...ve a lot to do with the drop in numbers. The early winter was mild, with not enough cold to end the winter dormancy or "diapause" of most butterflies, so they did not emerge to take advantage of early warm w...

Pollutant haze heats the Arctic

...tt says. "This effect is most pronounced in Arctic winter when it is dark and there is no sunlight. The Arctic winter is when it is most polluted because there is almost no precipitation to wash out the pollutants, and...

Recent, rapid climate change is driving evolution of animal species

...r growing seasons while simultaneously alleviating winter cold stress without imposing summer heat stress. In short, northern climates are becoming more like those in the south. "Over the past 40 years, animal species have been extending their range toward the poles and populations have been migrating, de...

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