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5 December 2013 11:26 am ,
Vol. 342 ,
An animal rights group known as the Nonhuman Rights Project filed lawsuits in three New York courts this week in an...
Researchers have been hot on the trail of the elusive Denisovans, a type of ancient human known only by their DNA and...
Thousands of scientists in the Russian Academy of Sciences (RAS) are about to lose their jobs as a result of the...
Dyslexia, a learning disability that hinders reading, hasn't been associated with deficits in vision, hearing, or...
Exotic, elusive, and dangerous, snakes have fascinated humankind for millennia. They can be hard to find, yet their...
Researchers have sequenced and analyzed the first two snake genomes, which represent two evolutionary extremes. The...
Snake venoms are remarkably complex mixtures that can stun or kill prey within minutes. But more and more researchers...
At age 30, Dutch biologist Freek Vonk has built up a respectable career as a snake scientist. But in his home country,...
- 5 December 2013 11:26 am , Vol. 342 , #6163
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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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