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Tag: "eaten" at biology news

Marine phytoplankton changes form to protect itself from different predators

...determines the fate of the carbon it contains. If eaten by copepods, for example, the carbon becomes part of fecal packages that sink into the deep ocean where a portion of that carbon is sequestered – thereby reducing atmospheric carbon dioxide, a leading greenhouse gas. If consumed by smaller creatures...

Pistachios lower cholesterol, provide antioxidants

...ontrolled feeding experiments provide all the food eaten by study subjects for the duration of the study se...ized LDL. "Our study has shown that pistachios, eaten with a heart healthy diet, may decrease a person's CVD risk profile," says Dr. Penny Kris-Etherton, ...

A cherry on top: Tart cherries may alter heart/diabetes factors

...ferent from the sweet Bing cherries that are often eaten raw, and have higher concentrations of antioxidant anthocyanins than sweet cherries. By the end of the study, the rats that received the 1-percent cherry diet had total cholesterol, triglyceride, glucose and insulin levels that were significantly...

Why do oysters choose to live where they could be eaten?

...cientists has found that despite the risk of being eaten by cannibalistic adults, oyster larvae choose to settle in areas of high oyster concentrations to take advantage of future benefits of increased reproductive capacity when they mature. "Oyster larvae make a life or death decision when they get the...

Parasites' impact goes beyond host to affect ecosystem

...excreting the eggs of C. lingua, which are in turn eaten by the snails. "The parasite’s life cycle is a really amazing strategy for an organism that doesn’t have a brain," says Byers, who predicts that anywhere gulls are prevalent, the C. lingua trematode would also be prevalent. A laboratory experim...

Peanut allergies overstated, study finds

... "There is a population of children who have never eaten peanuts ?or worse, those that eat them everyday, t... Dr Wainstein said many children who have never eaten peanuts and are found to have a positive peanut skin test are probably NOT allergic to peanut and wi...

Eating with our eyes: Why people eat less at unbused tables

...g the Super Bowl who saw how much they had already eaten -- in this case, leftover chicken-wing bones -- ate 27 percent less than people who had no such environmental cues, finds a new Cornell study. The difference between the two groups -- those eating at a table where leftover bones accumulated compared...

Using brain scans, researchers find evidence for a two-stage model of human perceptual learning

...are both green and round, but only an apple can be eaten and only a green tennis ball belongs to a sport. In this study, the research team asked human volunteers to undertake a series of tasks presented to them on a computer screen. All of them involved cars that were generated with a computer graphics...

Researchers find 6,000-year-old fossil evidence

...lto, leading her to conclude that these foods were eaten by everyone, not just the commoners or the elites. ...

Prehistoric mystery organism verified as giant fungus

..., Boyce said. But even if Prototaxites hadn’t been eaten by the dinosaurs and elephants that came much later, they probably grew too slowly to rebuild from regular disturbances of any kind, Boyce said. "It’s hard to imagine these things surviving in the modern world," he said....

A buffet for early human relatives

...d sedges, which include tubers. They also may have eaten animals that grazed on C4 plants. If a sample has a relatively low ratio of carbon-13 to carbon-12, it means Paranthropus was eating C3 plants, including the leaves and fruits of trees and shrubs, as well as forbs, which are broadleaf herbs that...

Why do insects like to eat some plants more than others?

...ivore dynamics, specifically why plants aren't all eaten at the same rate. Plant-insect ecologists typically attribute the differences to variation in the nutritional quality or defective chemistry of plant tissues. However, the researchers found that cactus-feeding insects chose host plants based on how...

Microbe fixes nitrogen at a blistering 92 C

... be used by land and sea plants, which in turn are eaten by higher animals. Today's oceans contain nitrogen both as a dissolved gas and as nitrate. Ocean water that percolates down into the seafloor can pick up enough heat from volcanism deep in the earth to cause the fixed nitrogen to revert to its gase...

Psst! Coffee drinkers: Fruit flies have something to tell you about caffeine

...hers. By color-coding sweet and bitter substances eaten by fruit flies and examining the coloring that shows up in their translucent bellies, the Hopkins team hoped to learn whether flies missing a specific "taste-receptor" protein changed their taste preferences. "Normally," Montell explains, "when giv...

Dinosaurs -- stones did not help with digestion

...he researchers presume that they were accidentally eaten with their food or could have been swallowed on purpose to improve the intake of minerals. But if the stones did not help to crush vegetable food, the sauropods' digestive system must have used other methods, since the decomposition of large amounts ...

Serengeti patrols cut poaching of buffalo, elephants, rhinos

...m elephants and rhinos which are traditionally not eaten ?are caught in snares set by local villagers for their own use or sale. A recent article in National Geographic, for example, said estimates of the poaching toll range as high as 200,000 in the Serengeti. Hilborn says that poaching cannot be nearly t...

Cutting calories slightly can reduce aging damage

...ly and were fed slightly less than they would have eaten if allowed to have their fill. Liver samples from these groups were compared with samples taken from young rats. The old sedentary rats that ate until they were full had increased levels of harmful oxidizing and inflammatory molecules in the liver t...

Predators prefer to hunt small-brained prey

...edators." "Some animals' ability to avoid being eaten by predators may be a contributing factor to the evolution of large brains across some species, adding to conventional theories which argue this is important for developing social relationships and using tools." ...

Leptin found to control appetite and limb development in frogs

...rvival by being more prone to drying out, to being eaten by predators and reaching sexual maturity at a later age. Denver speculates that leptin is probably important to gauge whether the tadpole has adequate energy reserves---in the form of body fat - to start metamorphosis at an appropriate time. Findin...

Seeing the serpent

...about the same time. Other animals that could have eaten our ancestors, such as big cats, and hawks and eagles, evolved much later. Venomous snakes evolved about 60 million years ago, raising the stakes and forcing primates to get better at detecting them. "There's an evolutionary arms race between the...

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