Navigation Links
Researchers document rapid, dramatic 'reverse evolution' in the threespine stickleback fish
Date:5/15/2008

SEATTLE Evolution is supposed to inch forward over eons, but sometimes, at least in the case of a little fish called the threespine stickleback, the process can go in relative warp-speed reverse, according to a study led by researchers at Fred Hutchinson Cancer Research Center and published online ahead of print in the May 20 issue of Current Biology (Cell Press).

There are not many documented examples of reverse evolution in nature, said senior author Catherine Katie Peichel, Ph.D., but perhaps thats just because people havent really looked.

Peichel and colleagues turned their gaze to the sticklebacks that live in Lake Washington, the largest of three major lakes in the Seattle area. Five decades ago, the lake was, quite literally, a cesspool, murky with an overgrowth of blue-green algae that thrived on the 20 million gallons of phosphorus-rich sewage pumped into its waters each day. Thanks to a $140 million cleanup effort in the mid-60s at the time considered the most costly pollution-control effort in the nation today the lake and its waterfront are a pristine playground for boaters and billionaires.

Its precisely that cleanup effort that sparked the reverse evolution, Peichel and colleagues surmise. Back when the lake was polluted, the transparency of its water was low, affording a range of vision only about 30 inches deep. The tainted, mucky water provided the sticklebacks with an opaque blanket of security against predators such as cutthroat trout, and so the fish needed little bony armor to keep them from being eaten by the trout.

In 1968, after the cleanup was complete, the lakes transparency reached a depth of 10 feet. Today, the waters clarity approaches 25 feet. Lacking the cover of darkness they once enjoyed, over the past 40 years about half of Lake Washington sticklebacks have evolved to become fully armored, with bony plates protecting their bodies from head to tail. For example, in the late 60s, only 6 percent
'/>"/>

Contact: Kristen Woodward
kwoodwar@fhcrc.org
206-667-5095
Fred Hutchinson Cancer Research Center
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Stowers Institute researchers identify gene linked to vertebral defects in patient populations
2. Researchers discover architecture for fundamental processes of life
3. ASU researchers synthesize molecule with self-control
4. Researchers uncover mechanism of action of antibiotic able to reduce neuronal cell death in brain
5. Berkeley researchers identify photosynthetic dimmer switch
6. Magnet Lab researchers make observing cell functions easier
7. Researchers find way to make tumor cells easier to destroy
8. UC Davis stem researchers demonstrate safety of gene therapy using adult stem cells
9. Researchers report the cloning of a key group of human genes, the protein kinases
10. UT researchers find link between advertising and increased tobacco use among Indias youth
11. QUT researchers develop smart instrument for tissue damage assessment
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/22/2014)... feature natural habitats and trees and not just asphalt ... to a University of Colorado Boulder study. , Working ... provide stress-reducing benefits for youth, according to a paper ... The study is one of the first of its ... to green settings and stress. , "Many schools already ...
(Date:7/22/2014)... Conn. , July 22, 2014 ... the growing m-commerce market, announces its next generation smart ... 30-minute consumer oriented television show that airs on ... NewsWatch regularly features top technology ... July 31st on the History Channel (6:00-6:30am ET/PT) ...
(Date:7/21/2014)... researchers have detected genetic fragments of Middle East Respiratory ... holding a camel infected with the virus. The work, ... open-access journal of the American Society for Microbiology, indicates ... disease can be transmitted through the air. , MERS, ... has been identified in 699 people as of June ...
Breaking Biology News(10 mins):Natural-terrain schoolyards reduce children's stress, says Colorado University-Boulder study 2Natural-terrain schoolyards reduce children's stress, says Colorado University-Boulder study 3NXT-ID's Next Generation Wocket Smart Wallet to be Featured on NewsWatch, Airing on History Channel, FYI Network and ION Network 2NXT-ID's Next Generation Wocket Smart Wallet to be Featured on NewsWatch, Airing on History Channel, FYI Network and ION Network 3Middle East Respiratory Syndrome coronavirus detected in the air of a Saudi Arabian camel barn 2
... between tiny single-celled algae and highly specialized bacteria. Their ... the oceans by taking nitrogen from the atmosphere and ... use. Details of the symbiosis, published in ... from the investigation of a mysterious nitrogen-fixing microbe with ...
... Just as women are advised to get plenty of folic ... new research suggests another very similar nutrient may one day ... Consuming greater amounts of choline ... may lower an infant,s vulnerability to stress-related illnesses, such as ...
... Bethesda, MD FASEB MARC (Minority Access to Research ... the 2012 Biomedical Engineering Society (BMES) Annual Meeting in ... meant to promote the entry of underrepresented minority students, ... science community and to encourage the participation of young ...
Cached Biology News:Unusual symbiosis discovered in marine microorganisms 2Unusual symbiosis discovered in marine microorganisms 3Unusual symbiosis discovered in marine microorganisms 4Nutrient in eggs and meat may influence gene expression from infancy to adulthood 2Nutrient in eggs and meat may influence gene expression from infancy to adulthood 3
(Date:7/22/2014)... OHAUS Corporation, a leading worldwide ... and scales, proudly announces its Explorer line of ... magazine’s 2014 “Readers' Choice” Award for best ... Explorer was voted the best laboratory balance by ... celebrates “excellence in product design and performance for ...
(Date:7/22/2014)... SHENZHEN, China , 22 juli 2014 /PRNewswire/ ... dochtermaatschappij van BGI, ,s wereld grootste organisatie op het ... een nieuwe service ten behoeve van hele menselijke genoomsequentie ... Complete Genomics. In 2013 acquireerde BGI ... hoog aanzien staat vanwege de in eigen beheer ontwikkelde ...
(Date:7/22/2014)... 22, 2014  Semler Scientific, Inc. (Nasdaq: ... assessment company that develops patented products that assist ... diseases, today announced that it will report second ... U.S. financial markets on July 25, 2014. Doug Murphy-Chutorian, M.D., ... conference call at 11 a.m. EDT, July 25, 2014. ...
(Date:7/22/2014)... Angeles, CA (PRWEB) July 22, 2014 ... test solutions with the debut of its fluorescent ... of Clinical Chemistry (AACC) meeting in Chicago, July ... or bench top versions, the HRDR-300 is a ... pending technology to analyze fluorescent lateral flow immunoassays ...
Breaking Biology Technology:OHAUS Explorer Voted “Best Balance” in Laboratory Equipment’s 2014 Readers’ Choice Awards 2BGI Tech introduceert service op gebied van hele menselijke exoomsequencing op geavanceerd Complete Genomics-platform 2Semler to Report Second Quarter 2014 Financial Results and Host Conference Call on July 25, 2014 2Holomic to Debut HRDR-300 Fluorescent Immunoassay Reader at the AACC 2014 2
... (NYSE: DGX ), the leading provider of diagnostic ... shareholders,on Friday, May 16th at 10:30 am ET., ... Relations,section of the company Web site at http://www.questdiagnostics.com/investor ... broadcast, a replay will be available on,the Web site ...
... study supports the potential for QLT,s drug elution technology ... reduce and ... QLT Inc. (NASDAQ: QLTI; TSX:,QLT) announced today results from ... QLT Plug Delivery, Inc., of its punctal plug,drug delivery ...
... 12 Amylin Pharmaceuticals,Inc. (Nasdaq: AMLN ) will ... May 14, 2008 at 3:05 p.m. CT / 1:05 ... Finance and Chief Financial Officer of,Amylin Pharmaceuticals, will be ... breakout session will be webcast, and a,recording will be ...
Cached Biology Technology:QLT reports initial proof of concept data for punctal plug delivery technology 2QLT reports initial proof of concept data for punctal plug delivery technology 3QLT reports initial proof of concept data for punctal plug delivery technology 4