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:12/5/2018)... ... 03, 2018 , ... uBiome, the leader in microbial genomics, ... Division of Gastroenterology and Hepatology at UC San Diego and staff gastroenterologist at ... board of leading scientists and doctors from around the world, Dr. Zarrinpar will ...
(Date:12/5/2018)... ... December 04, 2018 , ... Lifecycle Biotechnologies, a ... their 100-liter (26 gallon) SAFEthread Drum. The 100-liter SAFEthread Drum follows the ... a much-needed modern redesign to the plastic drums being used globally. Manufactured ...
(Date:11/29/2018)... (PRWEB) , ... November 29, 2018 , ... ... in Semba Biosciences with the intention of acquiring full ownership. The transaction was ... Agreement was executed on November 14, 2018. “We are extremely pleased to team ...
Breaking Biology News(10 mins):
(Date:11/13/2018)... ... November 13, 2018 , ... Aditya Humad, Managing Partner ... week that asserts it is still trending upward with growing valuations based on ... describes market consolidation, pricing pressure and increased competition as reasons often cited by ...
(Date:11/9/2018)... ... 08, 2018 , ... IC System, one of the largest ... increasing recovery rates by creating a comprehensive contact strategy for each consumer. ... NLP Logix, a Jacksonville, Florida-based AI solutions company, and leveraged the decades of ...
(Date:11/5/2018)... ... November 05, 2018 , ... ... education center to increase access to science research and education in the Frederick ... Technology (CREST) aims to provide access to STEM-based undergraduate and graduate degree and ...
(Date:11/3/2018)... ... 01, 2018 , ... Triangle Insights Group, a premier life sciences consulting firm, ... private companies in the United States, appearing on this year’s Inc. 5000 list. ... percentage revenue growth over the previous three years. , Separately, Triangle Insights was ...
Breaking Biology Technology:
Cached News: