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6 March 2014 1:04 pm ,
Vol. 343 ,
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...
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...
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ScienceShot: Guppies Where You Least Expect Them
21 February 2013 4:00 pm
Chalk up another conquest for the humble guppy. The tiny, brightly colored South American fish has long been a favorite of aquarium owners, and is also one of Earth's most successful invasive species, having expanded its range to every continent except Antarctica. Now, the guppy (Poecilia reticulata) has seized some unlikely new territory: It is the first freshwater fish ever found on the Cape Verdean archipelago, a chain of ten parched volcanic islands off the west coast of Africa. Just one of the drought plagued islands has streams that run year-round, researchers report in the current issue of African Zoology, and the only known freshwater animals were invertebrates such as snails and dragonflies. In late 2011, however, researchers from the University of Bern in Switzerland discovered guppies swimming in a concrete irrigation reservoir on the island of Santa Antão. The fish might have been imported by a pet lover, the researchers speculate. And it's not too soon to consider ways of eliminating the invaders, they add, because rapidly multiplying guppies are a well-known threat to native species.
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