8,312 results
8,312 results for: Fish
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- Chemistry
Lakes reveal low phosphate concentrations
Researchers using a new technique have found that previous measurements of phosphate, an important nutrient in lake ecosystems, have grossly overestimated its concentration.
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Evolution may not be slow or random
Studies of fruit flies taking over the New World and stickleback fish adapting to Canadian lakes suggest that evolution can proceed quickly and take predictable paths.
- Humans
Treaty Nears on Gene-Altered Exports
In an effort to help preserve biodiversity, negotiators from 130 nations crafted rules of conduct for international trade in living, genetically engineered organisms.
- Physics
Black hole recipe: Slow light, swirl atoms
Whirling clouds of atoms may swallow light the way black holes do, possibly giving scientists a way to test the general theory of relativity in the lab, not just in outer space.
- Earth
DDT treatment turns male fish into mothers
Injecting into fish eggs an estrogen-mimicking form of the pesticide DDT transforms genetically male medaka fish into apparent females able to lay eggs that produce young.
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Migration may reawaken Lyme disease
Lyme disease can hide in healthy-looking birds until the stress of migration drives it into a potentially infectious state.
- Chemistry
Power plants: Algae churn out hydrogen
Green algae can produce hydrogen, a clean-burning fuel that could one day power pollution-free cars.
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Glacial warming’s pollutant threat
Some Arctic wildlife are being exposed to high amounts of toxic wastes as glacial melting releases pollutants that had been buried in ice for decades.
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Is that salamander virus flying?
Scientists searching for the carrier of the iridovirus causing a salamander disease have dismissed frogs and fish, but not birds.
- Animals
Pregnant—and Still Macho
Some of the basic theories of sexual behavior and sexual selection are getting attention thanks to a burst of new studies in the topsy-turvy social world of the seahorse, where the males get pregnant.
- Chemistry
Molecules Leave Their Mark
A material etched with tiny, carefully shaped pores can act like an artificial enzyme, cell membrane, or receptor.
