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:7/9/2015)... , July 07, 2015 ... the addition of the "Biometrics for Banking; ... 2015-2020" report to their offering. ... contributor to this growth and the forecast is ... in revenue for companies involved in delivering biometric ...
(Date:7/9/2015)... JOSE, Calif. , July 9, 2015 ... the leading developer of human interface solutions, ... technology, the industry,s first fully hardware encapsulated ... Match-in-Sensor secure authentication technology is literally off ... storage and biometric matching within the fingerprint ...
(Date:7/8/2015)... NEW YORK , July 8, 2015  BD ... announced BD & Guidepoint Mentor, a new ... to Guidepoint,s expert network services. BD ... technologies to improve healthcare delivery and outcomes and, with ... start-up entrepreneur will be able to directly engage with ...
Breaking Biology News(10 mins):Global Banking Biometrics Market 2015-2020 - Market & Technology Analysis, Adoption Strategies and Forecasts 2Global Banking Biometrics Market 2015-2020 - Market & Technology Analysis, Adoption Strategies and Forecasts 3Synaptics Announces World's First Match-in-Sensor Fingerprint Authentication Technology 2Synaptics Announces World's First Match-in-Sensor Fingerprint Authentication Technology 3BD and Guidepoint Team to Connect Healthcare Start-up Companies With Business and Scientific Experts 2BD and Guidepoint Team to Connect Healthcare Start-up Companies With Business and Scientific Experts 3
... A tiny, fast switch that uses water droplets to create ... mechanism found in palm beetles. , The new beetle-inspired ... on the scale of a micron -- a millionth of ... larger applications like powerful adhesive bonding. Like the transistor, whose ...
... that the brains of alcoholics are smaller, lighter ... speakers at the October 2004 Congress for the ... Mannheim, Germany reviewed what is known about the ... shrinkage. Proceedings are published in the June issue ...
... and Infectious Diseases (NIAID), part of the National Institutes ... which cause such serious diseases as West Nile fever, ... defenses in different ways depending on whether they are ... to new approaches to developing vaccines and treatments against ...
Cached Biology News:Beetle-inspired switch uses water for bonding 2Investigating 'brain shrinkage' in alcoholics 2Investigating 'brain shrinkage' in alcoholics 3Investigating 'brain shrinkage' in alcoholics 4Investigating 'brain shrinkage' in alcoholics 5Scientists show that tick-borne flaviviruses use a novel mechanism to evade host defenses 2Scientists show that tick-borne flaviviruses use a novel mechanism to evade host defenses 3
(Date:7/28/2015)... , July 28, 2015 /PRNewswire/ - Aeterna Zentaris ... announced that it has granted to German life ... the development and commercialization of biotechnology (collectively, the ... recombinant oral allogenic tumor vaccine technology (the "Technology"), ... prostate cancer which is ready to enter a ...
(Date:7/28/2015)... July 28, 2015  Faced with increasing challenges ... palliative rather than symptomatic, the global healthcare industry ... therapies capable of curing or significantly changing the ... to look towards regenerative medicine as a viable ... paradigm in human health with the potential to ...
(Date:7/27/2015)... EDMONTON , July 27, 2015 /PRNewswire/ - Quest ... pharmaceutical company developing and commercializing products for the treatment ... Quest announces that it has closed a $1,000,000 ... private placement of 16,666,667 units of the Company at ... comprised of one common share and one common share ...
(Date:7/27/2015)... ... July 27, 2015 , ... Brady (NYSE:BRC), a ... 3 Ways to GHS Labels . This video provides useful information on ... (GHS) by effectively labeling chemical containers. , “With the fourth and final deadline ...
Breaking Biology Technology:Aeterna Zentaris Grants Option to Develop and Commercialize Oral Allogenic Cancer Vaccine Technology 2Aeterna Zentaris Grants Option to Develop and Commercialize Oral Allogenic Cancer Vaccine Technology 3Stem Cell Therapy to Redefine Regenerative Medicine, says Frost & Sullivan 2Stem Cell Therapy to Redefine Regenerative Medicine, says Frost & Sullivan 3Stem Cell Therapy to Redefine Regenerative Medicine, says Frost & Sullivan 4Stem Cell Therapy to Redefine Regenerative Medicine, says Frost & Sullivan 5Quest PharmaTech Closes $1,000,000 Private Placement 2Brady Releases “3 Roads to GHS Labels” Video 2
... (NYSE: MOS ) has announced it will ... taking place on Wednesday, February 9, 2011.  Larry Stranghoener, ... scheduled to speak at 10:10 a.m. Eastern Standard Time. ... be available at the time of the presentation on ...
... ROCHESTER, N.Y., Feb. 7, 2011 Thermal Gradient, a ... fast PCR technology for molecular diagnostics.  PCR (polymerase chain ... forms of DNA testing. The company,s latest ... the performance of PCR at speeds many times faster ...
... N.J., Feb. 7, 2011 ... today it will host a roundtable and give a ... week at the Summit for Clinical Ops Executives ( ... hotel. (Logo: http://photos.prnewswire.com/prnh/20100707/NY31446LOGO) As part ...
Cached Biology Technology:Thermal Gradient Announces Breakthrough in Fast PCR Device Technology 2Cmed Technology to Host Roundtable, Give Presentation About EDC Pain Points at Summit for Clinical Ops Executives (SCOPE) 2Cmed Technology to Host Roundtable, Give Presentation About EDC Pain Points at Summit for Clinical Ops Executives (SCOPE) 3
... materials necessary for the isolation and preparation of ... Kit Components: Erythrocyte ... containing 220 mL of buffered ammonium chloride. (NH ... No. 5113) One bottle containing 220 mL of ...
... culture systems provide an integrated ... for staining and imaging. Each ... preassembled with standard optical-quality coverslips ... entire system is provided sterile ...
ANTI NO-TRYPTOPHAN CONJUGATE...
... The Zero Background/Kan Cloning ... with kanamycin resistance for selection ... vector utilizes positive selection to ... contains all of the reagents ...
Biology Products: