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Tag: "warm" at biology news

Fire ants: Their true story told by the scientist who loves them

...th; it's actually a solarium that collects heat to warm its residents. The tunnels below it hold anywhere from a few dozen to several hundred thousand of the highly territorial critters (Tschinkel has counted them but says it's not easy). A mature colony can encompass approximately 300 feet of underground...

Important gene controlling tree growth and development found

...to stop growing and set buds, even if it is a very warm fall. The trees are known to display a "critical daylength". If the days get shorter than this critical daylength the tree responds with growth cessation and bud set. The further north the trees grow the more important it is to stop growing and form ...

Thermal imaging shatters arousal gender gap myth

...emperature. Because of its usefulness in detecting warm objects in the dark, most people know it as the technology used in night vision goggles for military operations. Previously, sex researchers have measured arousal with instruments that require genital contact and manipulation. Binik focused...

Far more than a meteor killed dinos

... was rapid, over about 20,000 years, and it stayed warm for about100,000 years, then cooled back to normal well before the mass extinction." Marine species at the time suffered from the heat. Most adapted to the stress conditions by dwarfing, growing less than half their normal size and reproducing rapi...

Ocean temperature predicts spread of marine species

...ace means larvae will travel a shorter distance in warm seas, the effect is more severe when temperatures ...ng California's coast, sea surface temperature may warm from 53 degrees to 59 degrees Fahrenheit during an El Nino year, when a warm ocean current appears i...

'Fruit fly dating game' provides clues to our reproductive prowess

... was rapid, over about 20,000 years, and it stayed warm for about100,000 years, then cooled back to normal well before the mass extinction." Marine species at the time suffered from the heat. Most adapted to the stress conditions by dwarfing, growing less than half their normal size and reproducing rapi...

A giant among minnows: Giant danio can keep growing

...abitants of home aquariums. They are native to the warm waters around India and some other areas of southern Asia. Although both are small, the danio is a giant among minnows, growing to a maximum of six inches. The zebrafish, in contrast, grows to about two inches. The zebrafish has been a staple of ge...

Asia's odd-ball antelope gets collared

...his unusual nose is not clear, but it may serve to warm or filter air during Mongolia's frigid winters and notorious dust storms. Today saiga numbers have plummeted by 95 percent from an estimated one million animals just 15 years ago, due to poaching for Chinese medicines and competition with livestoc...

Longer-lived rodents have lower levels of thyroid hormone

...its body converts T4 to T3 to speed metabolism and warm the body, he explained. "Mice strains that exhibit extended longevity tend to have lower thyroid hormone concentrations than shorter living strains," the authors wrote. "Significant declines in thyroid hormone correlate well with enhanced maximum ...

Reef warns of sea level rise

...iver corals we have evidence of not only unusually warm ocean temperatures, but that that this was associa...ramatic and surpass those of the Last Interglacial warm period" "Sea level rises and falls have occurred throughout geological history and are all slightl...

One-of-a-kind imaging probe reveals secrets useful for drug discovery

...h the analysis. But the sample area itself is kept warm to protect the specimen. "It is now possible to approach problems we couldn't think about before," said Edison, who said he welcomes collaboration with other scientists interested in using the new probe. "For example, in mouse models of Parkinson's ...

Microbes compete with animals for food by making it stink

...sed for bait -- that had been rotting in a pool of warm water ?some of it for one day and the rest for two days. They also baited other traps with freshly thawed menhaden, which contained relatively few microbes. Then they set the traps in the marshes near Skidaway Island and caught hundreds of stone crab...

Dig deeper to find Martian life

...trobiologists is finding a living cell that we can warm up, feed nutrients and reawaken for studying. "It just isn’t plausible that dormant life is still surviving in the near-subsurface of Mars ?within the first couple of metres below the surface ?in the face of the ionizing radiation field. Finding ...

Human preference for other species could determine whether they survive

...ans appear to be the ones that display markings of warm colors such as red, orange or intense yellow, said David Stokes, a conservation biologist at the University of Washington, Bothell. He and his undergraduate students calculated the popularity of various species by studying photographs in four lar...

MIT's ocean model precisely mimics microbes' life cycles

...prochlorococcus that are extremely abundant in the warm mid-latitude Atlantic and Pacific oceans. Chisholm said this is the first major change in the way scientists approach ocean models in many years. She believes it will serve to break down disciplinary barriers between the physical and biological o...

Fruit flies and global warming -- Some like it hot

...mer, but there's not much benefit when it's always warm or always cool. Hardening is likely to become increasingly important for survival as global warming makes our weather more variable. ...

Florida Tech explores microalgae for biofuel

...e cultivation is an attractive alternative and the warm Florida climate makes large-scale production a possibility," said Lin. ...

Bumblebee house warming -- it takes a village

...under four temperature conditions ?cold, moderate, warm and hot. Temperatures ranged from 10.3 to 38.6 degrees Celsius (about 50 to 101 degrees Fahrenheit). The study focused more on incubation than fanning because the researchers did not want to raise the temperature too high. Excessive heat can kil...

Birth rate, competition are major players in hominid extinctions

...ty with longer cold seasons and shorter periods of warm weather. Leading up to and during the last glacial maximum about 18,000 years ago, the grassy plains disappeared, taking with them the animals that relied on large expanses of grass for grazing. These animals were the prime food source for Neanderta...

Global 'sunscreen' has likely thinned, report NASA scientists

...n more sunlight can get through the atmosphere and warm Earth's surface, you're going to have an effect on climate and temperature," said lead author Michael Mishchenko of NASA's Goddard Institute for Space Studies (GISS), New York. "Knowing what aerosols are doing globally gives us an important missing p...

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