Tooth Carp can survive by rapid evolution in contaminated water



Tooth Carp can survive by rapid evolution in heavily contaminated water, according to a new study. 
The fish can withstand 8,000 times more pollution in their environment than other species. That resistance to chemicals in the water, the animals within half a century by changes in their DNA, report researchers from the University of California in the journal Science. 
The scientists came to their findings by analyzing the DNA sequence of 400 toothcarps. The fish were caught in the eastern United States off the coast of New Jersey, Connecticut and Massachusetts
The study shows that the DNA of the animal has changed in several places in the last fifty years. Through these evolutionary adaptations the animals are less sensitive to chemicals than other fish. With many young fish's immune system can be compromised by contaminated seawater, but on toothcarps it does not happen.
 Probably toothcarps could adapt to the contamination within a few decades, because the genetic variation of the fish is very large. There are quite a few in each population of animals with genes that can protect against chemicals. 
If toothcarps migrate to contaminated sites, especially remain the offspring of these animals live and are rapidly creating a population that is resistant to contaminated. 
According to lead researcher Andrew Whitehead most fish species can not adapt so quickly to contaminated water. "Some people might think now 'hey, fish can adapt to a contaminated environment'", says Whitehead on news site Phys.org. "Unfortunately, most species do not have the ability to evolve as fast since they have not so much genetic variation have as a toothcarps."
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Shavida

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