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Tag: "species" at biology news

Wisconsin researchers identify sleep gene

...leep, and that similar genes are expressed in both species when they are awake and asleep. Tononi's team also conducted EEGs on the flies and found evidence of the same electrophysiological changes occurring during sleep and wakefulness as in humans. "The electrical changes in humans look different that the...

Camera Traps Catch Eye of the Tiger

...ypes and determine whether there are adequate prey species for tigers to subsist. The results could have significant implications for species and forest preservation here and around the world. "Sumatran tigers are critically endangered, with...

New online portal merges vast data on Gulf of Maine ecosystem

...alyses, such as calculating the rate at which fish species are being first identified in the various regions of the Gulf, or the prevalence of different species of fish in the different areas of the Gulf, and how abundance and distribution is changing over time...

Polymers with copper show promise for implanted sensors

...h me, but if you don't have enough of the reactive species in your blood, then it may not generate adequate nitric oxide levels and it may not prevent clotting," said Meyerhoff. To get at these questions, the researchers have developed a way of measuring the amount of nitrosothiols in blood samples, and they...

Robot-based system developed at Carnegie Mellon detects life in Chile's Atacama desert

...vered bacteria to identify the different microbial species present in the samples. He also is testing the bacteria's sensitivity to ultraviolet (UV) radiation. One hypothesis is that the bacteria may have greater UV resistance because they are exposed to extreme UV radiation in the desert environment. This c...

Alaskan puzzles, monitoring provide insight about North Pacific salmon runs

...merging insects, zooplankton levels and other fish species and juvenile salmon growth, which distinguishes the data set from other salmon monitoring records. ...

Biodiversity hotspots identify conservation priorities

... in their own right. The scientists delved beyond species to identify genera and families that are unique to...l as from scientists' ever-increasing knowledge of species and their habitats," said Gustavo A.B. da Fonseca, executive vice president of CI. Two factors dete...

Low level of extinction during ice age linked to adaptability

...relatively resistant to extinction," he said. "Yet species are dying off at an alarming rate. It may be that ... so much that we are now causing the extinction of species that should be relatively immune. Though it's difficult to say exactly what the implications are for...

Transgenic plants remove more selenium from polluted soil than wild plants, new tests show

...veys to ensure that no other mustard-related plant species were being grown in the vicinity," said Banuelos. He noted that every morning trained workers swept through the fields to literally nip any flowers in the bud, and that netting and buried chicken wire were used to keep wildlife away from the plants....

Researchers discover chemical compounds that affect plant growth

...model plant, Arabidopsis, can be used in non-model species to improve agronomic traits and increase crop value," said research team leader, Distinguished Professor of Plant Cell Biology Natasha Raikhel. The team published its findings in this week's issue of the Proceedings of the National Academy of Scienc...

Fibril Shape Is The Basis Of Prion Strains And Cross-species Prion Infection

...humans, suggests that the ability of prions in one species to infect other species depends on the shape of the toxic threadlike fibers produced by the prion. Two studies on the topic ...

Scientists discover how plants disarm the toxic effects of excessive sunlight

...sponse mechanism is likely highly conserved across species from microbes to plants and humans - and therefore...inglet oxygen, says Donohue. Other reactive oxygen species - often called "free radicals" - are thought to be at the root of many debilitating diseases. "Ther...

Gray wolves maintain the food chain in winter

...hat the impact of climate change on many different species in Yellowstone Park can be buffered by a top preda...ls described here can guide their efforts and help species adjust to major environmental shifts like climate change. Crucially, Wilmers and Getz's study shows ...

Researchers find new genes necessary to make embryo

...norhabditis elegans (C. elegans), the first animal species whose genome was completely sequenced and a model organism to study how embryos develop. Using RNA interference (RNAi), a method for identifying the function of genes, the researchers almost double previous estimates of how many genes are required to...

Survey finds silver contamination in North Pacific waters

...arly 1980s that clams stopped reproducing and some species of invertebrates disappeared from mudflats, he said. At that time, silver concentrations in the bay were 100 times higher than the levels Ranville and Flegal found in the open ocean. With stricter pollution controls, however, silver has now declined ...

Love's all in the brain: fMRI study shows strong, lateralized reward, not sex, drive

...e myriad physiological ornaments that one sex of a species have evolved to attract members of the opposite sex, like the peacock's fancy tail feathers that attract the peahen," Fisher noted. "But no one has studied what happened in the brain of the viewer, the individual that becomes attracted to these trait...

Reservoirs may accelerate the spread of invasive aquatic species, researchers say

...oirs make them more likely to be invaded by exotic species than natural lakes. The researchers point to cases...h habitats adapt to fresh water. Several invasive species are suspected to have benefited from the use of reservoirs as avenues, including Daphnia lumholtzi, ...

To control germs, scientists deploy tiny agents provocateurs

...film forma. Biofilms can often constitute several species of bacteria and can be both harmful and beneficial...), a natural molecule that is used by more than 50 species of bacteria to "talk." Researchers have so far studied around 15 variations of AHLs. In particular, ...

Solutions that reduce death of marine life reeled in by International Smart Gear Competition

...e hooked in shallower waters than tuna, the target species of most longline commercial fishing. According to ... will reduce the unnecessary decline of vulnerable species due to bycatch. Applicants from 16 countries applied their ingenuity and expertise to solving this g...

Super predators and mass extinctions

... University) constructed a numerical model of many species competing for both food and living space. The mode... a term that controls mutation rates, allowing new species to develop over time. The model shows that, much of time, the system is populated with "medium effic...

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