HOME >> BIOLOGY >> NEWS
Study suggests humans can speed evolution

It's no secret that life in the 21st century moves at a rapid pace. Human inventions such as the Internet, mobile phones and fiber optic cable have increased the speed of communication, making it possible for someone to be virtually in two places at once. But can humans speed up the rate of one of nature's most basic and slowest processes, evolution? A study by J. Todd Streelman, new assistant professor of biology at the Georgia Institute of Technology suggests that humans may have sped up the evolutionary clock for one species of fish.

Cichlid fish are well known to biologists for their rapid rate of evolution. While it takes many animals thousands of years to form new species, the cichlids of Africa's Lake Malawi are estimated to have formed 1,000 new species in only 500,000 years, lightning speed in evolutionary terms. But in the 1960s a fish exporter may have unwittingly set the stage for an evolutionary explosion when he introduced individuals of the species Cynotilapia afra to Mitande Point on the lake's Thumbi West Island. As of 1983, the species hadn't budged from Mitande Point. But when Streelman, then at the University of New Hampshire, Durham, and colleagues went to the island in 2001, they found the fish had evolved into two genetically distinct varieties in less than 20 years. The study appears in the August 13 edition of Molecular Ecology.

"This is a great example of human-induced evolution in action," said Streelman. "It adds to a growing list of cases, including introduced salmon, flies and plants, where human disturbance has set the stage for contemporary evolution on scales we've not witnessed before."

The fish have evolved into two genetically distinct and differently colored populations, one on the north side of the island, the other on the south, said Streelman. Cichlid color patterns are important in mate selection, so these distinct markings may promote the evolution of new species.

Whether or not that happen
'"/>

Contact: David Terraso
david.terraso@icpa.gatech.edu
404-385-2966
Georgia Institute of Technology
4-Aug-2004


Page: 1 2

Related biology news :

1. Study: Emission of smog ingredients from trees is increasing rapidly
2. Study explores gene transfer to modify underlying course of Alzheimers disease
3. Study reveals why eyes in some paintings seem to follow viewers
4. Study by Israeli scientists provides insight on DNA code
5. Study reveals first genetic step necessary for prostate cancer growth
6. Study of flu patients reveals virus outsmarting key drug
7. Study in Science reveals recreational fishing takes big bite of ocean catch
8. Study suggests cell-cycle triggers might be cancer drug targets
9. Study narrows search for genes placing men at increased risk for prostate cancer
10. Study links high carbohydrate diet to increased breast cancer risk
11. Study explains spatial orientation differences between sexes

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:9/1/2018)... ... ... Lecomte is hard at work on his second ocean crossing. After becoming the first human ... Tokyo to San Francisco, churning his limbs eight hours a day in the cold Pacific ... of its kind, The Swim is far more than just an extreme sport. Besides the ...
(Date:8/31/2018)... ... 30, 2018 , ... USDM Life Sciences , the leading risk management, ... has received the 2018 Services Partner of the Year, Awarded for Innovation from Box, ... Business Development and Platform Sales, Niall Wall and received by USDM Life Sciences CEO, ...
(Date:8/26/2018)... ... August 23, 2018 , ... Clinical laboratories have increasingly ... over more commonly used analytical techniques. However, implementation can be daunting due to ... validation of methods that must be undertaken by the laboratory if they are ...
Breaking Biology News(10 mins):
(Date:8/29/2018)... (PRWEB) , ... August 28, 2018 , ... ... nano-technology enhanced spinal implants, announced today the successful completion of a $5.5 million ... Capital Corporation, Purdue’s Foundry Investment Fund, Commenda Capital, and Ellipsis Ventures. , “Our ...
(Date:8/29/2018)... Calif. (PRWEB) , ... August 28, 2018 , ... ... scientists from around the world, is proud to announce the launch of a new ... offers for a chance to win one of LabRoots most popular shirts. , Throughout ...
(Date:8/23/2018)... , ... August 22, 2018 , ... ... for Android on September 1st, making it the first fully-featured app for electronic ... Android devices. Combined, iOS and Android constitute 99 percent of the market share ...
(Date:8/17/2018)... ... August 16, 2018 , ... The opening of the new ... Chemko Technical Services in 2016. Chemko had a well established local presence, servicing the ... KSC on projects such as the ongoing work at the Mobile Launch Platform (MLP) ...
Breaking Biology Technology:
Cached News: