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Magdalena Koziol, a former postdoc at Yale University, was the victim of scientific sabotage. Now, she is suing the...
Antiretroviral drugs can protect people from becoming infected by HIV. But so-called pre-exposure prophylaxis, or PrEP...
Two studies show that eating a diet low in protein and high in carbohydrates is linked to a longer, healthier life, and...
Considered an icon of conservation science, researchers at World Wildlife Fund (WWF) headquarters in Washington, D.C.,...
The new atlas, which shows the distribution of important trace metals and other substances, is the first product of...
Early in April, the first of a fleet of environmental monitoring satellites will lift off from Europe's spaceport in...
Since 2000, U.S. government health research agencies have spent almost $1 billion on an effort to churn out thousands...
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ScienceShot: Why Fish Haul Around Extra Guts
6 July 2011 1:00 pm
Put a fish in a tank with unlimited food and it will gobble until it grows many times its size. This is possible because the fish has a much larger digestive system than it actually needs. But why spend so much energy maintaining all of these guts when fish in the wild don't eat nearly as much? A new analysis of 600 fish populations (including the bluegill, pictured), reported online today in Nature, suggests that large guts help fish deal with feast or famine conditions in the wild. A digestive system that's two or three times bigger than needed helps these fish gorge on food when they find it and store the calories for times when food is scarce. And, in the long run, that makes hauling around a bunch of guts worthwhile.
See more ScienceShots.