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

of sticklebacks in Lake Washington were completely plated. Today, 49 percent are fully plated and 35 percent are partially plated, with about half of their bodies shielded in bony armor. This rapid, dramatic adaptation is actually an example of evolution in reverse, because the normal evolutionary tendency for freshwater sticklebacks runs toward less armor plating, not more.

We propose that the most likely cause of this reverse evolution in the sticklebacks is from the higher levels of trout predation after the sudden increase in water transparency, said Peichel, whose Hutchinson Center lab has established the stickleback as a new model for studying complex genetic traits. By examining multifaceted traits in the fish, such as body type and behavior, Peichel and colleagues shed light on the genetic networks at play in other complex traits, such as cancer and other common human diseases.

The ability of the fish to quickly adapt to environmental changes such as increased predation by the cutthroat trout is due, Peichel believes, to their rich genetic variation. The sticklebacks in Lake Washington contain DNA from both marine (saltwater) fish, which tend to be fully plated, and freshwater sticklebacks, which tend to be low-plated. When environmental pressures called for increased plating, some of the fish had copies of genes that controlled for both low and full plating, and so natural selection favored the latter.

Having a lot of genetic variation in the population means that if the environment changes, there may be some gene variant that does better in that new environment than in the previous one, and so nature selects for it. Genetic variation increases the chance of overall survival of the species, she said.

The researchers findings challenge a widely held theory behind rapid evolutionary change, the idea of phenotypic plasticity when an organism can take on different characteristics independent of genetic influences. Body type is
'/>"/>

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:7/11/2014)... at the Department of Energy,s Oak Ridge National ... by R&D Magazine in recognition of the year,s ... the tremendous value of our National Labs," said ... at the National Labs continues to help our ... scientific and technological innovations necessary to remain globally ...
(Date:7/11/2014)... Bone and Mineral Research awarded Michael F. Holick, PhD, ... the 2014 Louis V. Avioli Award. Holick, a professor ... known for revolutionizing the understanding of vitamin D and ... honors a member of the American Society for Bone ... and mineral basic research. It is named for ASBMR,s ...
(Date:7/11/2014)... Cell scientists have set a "mouse TRAP" to capture ... a recent study published in the Journal of ... a technique called TRAP to extract cellular and genetic ... by scientists at the Rockefeller Institute for Medical Research ... the protein-making machinery, or ribosomes, of the cell type ...
Breaking Biology News(10 mins):ORNL wins eight R&D 100s 2ORNL wins eight R&D 100s 3ORNL wins eight R&D 100s 4BUSM's Michael F. Holick receives American Society for Bone and Mineral Research award 2
... Scientists propose developing an environmentally-friendly fungal spray that would ... a critical growth stage. This spray will contain ... and will have no side-effects on non-target organisms and ... therefore provide a quick, safe and effective means for ...
... the Technion Israel Institute of Technology, the ... have recently identified genes responsible for the positive ... drug Copaxone®. These findings may contribute to the ... Copaxone® was the first original Israeli drug ...
... -- A new book by researchers at the ... the mouse demonstrates a surprising similarity between mice and humans. ... by a team from the Hebrew University Bone Laboratory consisting ... Hajbi-Yonissi and Dr. Yankel Gabet. Also participating in the writing ...
Cached Biology News:New hope for horse lovers as effective control for killer ragwort is proposed 2Israeli scientists identify: Genes that affect responses of multiple sclerosis patients to copaxone 2Of mice and men: similarities between skeletons of both 2
(Date:7/10/2014)... Francisco, CA (PRWEB) July 10, 2014 ... family closer together. The Archer Family purchased a ... contained within DNA, but ended up with a lifetime ... discoveries contained within the family members’ DNA genuinely brought ... had decided to search deeper into genetic history and ...
(Date:7/10/2014)... POINT, Ind. , July 10, 2014 ... expanded its use of capnography for respiratory ... growing group of healthcare leaders in embracing ... measures how effectively patients are breathing and ... depression occurs. By measuring the amount of ...
(Date:7/10/2014)... --  Ceres, Inc . (Nasdaq: CERE ), ... results for the three months ended May 31, 2014 ... Ceres reported that the company and its customers have ... in Brazil, which concluded in June, despite dry and ... for part of the growing season. Yields of several ...
(Date:7/10/2014)... of psychiatric disorders has been extremely challenging because there ... are insufficient to cause disease. Now investigators reporting in ... Cell Stem Cell describe a strategy that ... with other risk factors or environmental exposures to affect ... a genetic variant that may predispose individuals to schizophrenia. ...
Breaking Biology Technology:Ancestry DNA Test Reveals a Controversial and Undiscovered Family History 2Ancestry DNA Test Reveals a Controversial and Undiscovered Family History 3Ancestry DNA Test Reveals a Controversial and Undiscovered Family History 4Ancestry DNA Test Reveals a Controversial and Undiscovered Family History 5Franciscan St. Anthony Health-Crown Point Underscores Patient Safety Commitment Through Expanded Use of Capnography 2Ceres Announces Fiscal Third Quarter 2014 Financial Results 2Ceres Announces Fiscal Third Quarter 2014 Financial Results 3Ceres Announces Fiscal Third Quarter 2014 Financial Results 4Ceres Announces Fiscal Third Quarter 2014 Financial Results 5Ceres Announces Fiscal Third Quarter 2014 Financial Results 6Ceres Announces Fiscal Third Quarter 2014 Financial Results 7Ceres Announces Fiscal Third Quarter 2014 Financial Results 8Ceres Announces Fiscal Third Quarter 2014 Financial Results 9New strategy could uncover genes at the root of psychiatric illnesses 2
... 19 /PRNewswire-FirstCall/ - ARIUS Research Inc., (TSX:,ARI), a ... of,antibody therapeutics, today announced that David Young, MD, ... at the Chinese Global,Financial Forum. Dr. Young will ... will be available prior to and following his ...
... ... WEST HAVEN, Conn., Oct. 19 Dr. Heather Coyle ... Haven have,developed a new method for preparing certain skeletal remains ... the,research the group is doing for the Smithsonian Institution. Obtaining ...
... Therapeutics Inc., a,Nutritional Therapeutics Innovation Company, today announced ... Wakeman as President. "Pilot has always had ... and dietary supplement areas with over 60 issued ... potential to rapidly move our,world class technologies and ...
Cached Biology Technology:ARIUS to present at Chinese Global Financial Forum 2800-Year-Old Mummies Aid Current Cold Cases: 2Pilot Therapeutics Announces New Executive Team with Extensive Experience Creating New Health and Nutrition Businesses 2
... exciting product for cell-based kinetic assays and ... use of expensive HTS equipment, which lead ... assay development stage. The NOVOstar offers the ... well as any other assay suitable for ...
... measures mitochondria intactness and detects events ... Features and Benefits: Fast, ... isolated mitochondria and for assaying mitochondria ... reagents required for the detection of ...
... save space and organize gloves, ... other garb. They are the ... small parts used in labs, ... Open-slot design for easy cleaning. ...
... handy dispensers save space and ... hats, and other garb. They ... bins for small parts used ... Clear acrylic. Many other sizes ...
Biology Products: