Navigation Links
'Armored' fish study helps strengthen Darwin's natural selection theory
Date:8/28/2008

Shedding some genetically induced excess baggage may have helped a tiny fish thrive in freshwater and outsize its marine ancestors, according to a UBC study published today in Science Express.

Measuring three to 10 centimetres long, stickleback fish originated in the ocean but began populating freshwater lakes and streams following the last ice age. Over the past 20,000 years - a relatively short time span in evolutionary terms - freshwater sticklebacks have lost their bony lateral plates, or "armour," in these new environments.

"Scientists have identified a mutant form of a gene, or allele, that prohibits the growth of armour," says UBC Zoology PhD candidate Rowan Barrett. Found in fewer than one per cent of marine sticklebacks, this allele is very common in freshwater populations.

Barrett and co-authors UBC post-doctoral fellow Sean Rogers and Prof. Dolph Schluter set out to investigate whether the armour gene may have helped sticklebacks "invade" freshwater environments. They relocated 200 marine sticklebacks with the rare armour reduction allele to freshwater experimental ponds.

"By documenting the physical traits and genetic makeup of the offspring produced by these marine sticklebacks in freshwater, we were able to track how natural selection operates on this gene," says Rogers.

"We found a significant increase in the frequency of this allele in their offspring, evidence that natural selection favours reduced armour in freshwater," says Barrett.

Barrett and Rogers also found that offspring carrying the allele are significantly larger in size. "It leads us to believe that the genetic expression is also tied to increased growth rate," says Barrett.

"If the fish aren't expending resources growing bones - which may be significantly more difficult in freshwater due to its lack of ions - they can devote more energy to increasing biomass," says Barrett. "This in turn allows them to breed e
'/>"/>

Contact: Brian Lin
brian.lin@ubc.ca
604-822-2234
University of British Columbia
Source:Eurekalert

Page: 1 2

Related biology news :

1. Childhood obesity indicates greater risk of school absenteeism, Penn study reveals
2. A study by the MUHC and McGill University opens a new door to understanding cancer
3. Study begins to reveal clues to the cause and progression of sepsis
4. Clones on task serve greater good, evolutionary study shows
5. New study warns limited carbon market puts 20 percent of tropical forest at risk
6. New study examines how rearing environment can alter navigation
7. Study links cat disease to flame retardants in furniture and to pet food
8. New continent and species discovered in Atlantic study
9. Study shows link between alcohol consumption and hiv disease progression
10. Feeling hot, hot, hot: New study suggests ways to control fever-induced seizures
11. Study finds environmental tests help predict hospital-acquired Legionnaires disease risk
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:3/12/2015)... 12, 2015 WHEN:Tuesday, March 17, 2015 at ... http://bit.ly/1G7Os0L . SPEAKERS: , Frost & Sullivan Measurement ... http://photos.prnewswire.com/prnh/20150311/181111 Biometric companies must plan ... several different markets and industries. This is especially ... uptrend. Join Frost & Sullivan,s ...
(Date:3/10/2015)... 2015  Continuing its 167-year history of offering the ... The Eye Scanning Password Authenticator , a device ... secure websites or sensitive data. Employing the ... borders, the device has a small camera that scans ... iris, converting them into an encrypted ID that cannot ...
(Date:3/10/2015)... , March 10, 2015  NXT-ID, Inc. ... or the "Company"), a biometric authentication company focused ... company,s Wocket™ smart wallet has been named the ... Rethink Modern. Rethink Modern ( http://www.rethinkmodern.com/ ... innovative items for your home and lifestyle that have a ...
Breaking Biology News(10 mins):Biometrics Key to Future Growth in Healthcare, Retail and Financial Markets 2Biometrics Key to Future Growth in Healthcare, Retail and Financial Markets 3Hammacher Schlemmer Introduces The Eye Scanning Password Authenticator 2NXT-ID's Wocket Smart Wallet Named Number One Best Tech Gift for 2015 by Rethink Modern 2NXT-ID's Wocket Smart Wallet Named Number One Best Tech Gift for 2015 by Rethink Modern 3NXT-ID's Wocket Smart Wallet Named Number One Best Tech Gift for 2015 by Rethink Modern 4
... 2007) -- A research team at Weill Cornell Medical College ... be crucial to the production of an immune system cytokine ... an important "missing link" in a biochemical pathway that,s long ... diabetes, to cancer and AIDS. "IL-10 production has to ...
... NewYork-Presbyterian/Weill Cornell,s Dr. Jeffrey Borer Emphasize Need for ... Studies and Continuing Past Drug Approval NEW ... should be strengthened to ensure acceptable cardiovascular safety ... according to a recent presentation made by Dr. ...
... other studies linking human DNA to that of primates, there ... of evolution in DNA. Professor and research geneticist Daniel J. ... in the DNA of every person on the planet in ... DNA (Prometheus Books, $24.95). This book comes at a ...
Cached Biology News:2 genes are important key to regulating immune response 22 genes are important key to regulating immune response 3Physician-scientist urges improved drug regulation to ensure heart safety of non-heart drugs 2Physician-scientist urges improved drug regulation to ensure heart safety of non-heart drugs 3There is powerful evidence of evolution in human DNA 2
(Date:4/1/2015)...  Organovo Holdings, Inc. (NYSE MKT: ONVO) ("Organovo"), ... 3D bioprinting technology, presented data on the company,s ... Experimental Biology conference in Boston, Massachusetts ... ideal extension of Organovo,s capabilities to 3D bioprint ... pharmaceutical research," said Keith Murphy , Chairman ...
(Date:4/1/2015)... NEW YORK , April 1, 2015 ... biopharmaceutical company advancing protein biologic therapies and oncology ... the Company,s 2014 achievements and a strategic update ... progress the Company has made in the areas ... its MuGard programs, the FDA clearance of the ...
(Date:4/1/2015)... CA (PRWEB) April 01, 2015 Holomic ... that can read both chromatographic and fluorescent rapid tests ... supplier of high performance, quantitative readers and is already ... The HRDR-400 is a first of its kind offering ... one instrument. , Dr. Neven Karlovac, CEO of ...
(Date:4/1/2015)... NEW YORK CITY and LONDON ... of market research reports and solutions, MarketResearch.com is pleased to ... will be a year of market growth and opportunity for ... stem cell company or cord blood bank, competing in the ... market conditions, predict industry trends, and act on market changes ...
Breaking Biology Technology:Organovo Describes First Fully Cellular 3D Bioprinted Kidney Tissue 2Organovo Describes First Fully Cellular 3D Bioprinted Kidney Tissue 3Organovo Describes First Fully Cellular 3D Bioprinted Kidney Tissue 4PlasmaTech Biopharmaceuticals Provides Strategic Update for 2015 and Review of 2014 Acheivements 2PlasmaTech Biopharmaceuticals Provides Strategic Update for 2015 and Review of 2014 Acheivements 3PlasmaTech Biopharmaceuticals Provides Strategic Update for 2015 and Review of 2014 Acheivements 4PlasmaTech Biopharmaceuticals Provides Strategic Update for 2015 and Review of 2014 Acheivements 5PlasmaTech Biopharmaceuticals Provides Strategic Update for 2015 and Review of 2014 Acheivements 6Holomic to Introduce the First Dual, Chromatographic and Fluorescent Rapid Test Reader, the HRDR-400 2MarketResearch.com: "Blockbuster" Year for Stem Cells Creates Market Opportunities, Says BioInformant Worldwide Report 2MarketResearch.com: "Blockbuster" Year for Stem Cells Creates Market Opportunities, Says BioInformant Worldwide Report 3MarketResearch.com: "Blockbuster" Year for Stem Cells Creates Market Opportunities, Says BioInformant Worldwide Report 4
... - Merge Healthcare has released a new ... to enhance the image reading capabilities of radiologists. , ... Mammo(TM) version 7.0, will make possible simultaneous display and ... digital mammography, regardless of which vendor's acquisition device is ...
... the chance to play a bit more with the independent ... conference, Jaman.com offers a growing library of films to rent ... $6 per film. , ,While you can browse the Web ... downloadable player, a desktop application that's part media player, part ...
... Waukesha, Wis. - GE Healthcare has ... Research Excellence in Breast Cancer Imaging within the ... , ,With funding from GE Healthcare, a $17 billion ... is designed to advance and commercialize research and technology ...
Cached Biology Technology:We're "Jaman": Purpose-driven browsers drive next wave of Web applications 2We're "Jaman": Purpose-driven browsers drive next wave of Web applications 3
Human/Mouse/Rat JNK Pan Specific Affinity Purified PAb...
D-biotin *50 mM aqueous solution* Secondary Detection Biotin–Avidin Detection Reagents Other...
Endothelin-converting enzyme 1 (EC 3.4.24.71) (ECE-1). [Source:Uniprot/SWISSPROT;Acc:P42892] Antigen: Recombinant Protein Epitope Signature Tag (PrEST)....
X-Gal (5-Bromo-4-Chloro-3-Indoyl-beta -D-Galactopyranoside)...
Biology Products: