Navigation Links
Octopuses occasionally stroll around on two arms, UC Berkeley biologists report

In a stunning example of evolution at work, scientists have now found that changes in a single gene can produce major changes in the skeletal armor of fish living in the wild.

The surprising results, announced in the March 25, 2005, issue of journal Science, bring new data to long-standing debates about how evolution occurs in natural habitats.

"Our motivation is to try to understand how new animal types evolve in nature," said molecular geneticist David M. Kingsley, a Howard Hughes Medical Institute investigator at the Stanford University School of Medicine. "People have been interested in whether a few genes are involved, or whether changes in many different genes are required to produce major changes in wild populations."

The answer, based on new research, is that evolution can occur quickly, with just a few genes changing slightly, allowing newcomers to adapt and populate new and different environments.

In collaboration with zoologist Dolph Schluter, at the University of British Columbia, Vancouver, Canada, and Rick Myers and colleagues at Stanford, Kingsley and graduate student Pamela F. Colosimo focused on a well-studied little fish called the stickleback. The fish -- with three bony spines poking up from their backs -- live both in the seas and in coastal fresh water habitats all around the northern hemisphere.

Sticklebacks are enormously varied, so much so that in the 19th century naturalists had counted about 50 different species. But since then, biologists have realized most populations are recent descendants of marine sticklebacks. Marine fish colonized new freshwater lakes and streams when the last ice age ended 10,000 to 15,000 years ago. Then they evolved along separate paths, each adapting to the unique environments created by large scale climate change.

"There are really dramatic morphological and physiological adaptations" to the new environments, Kingsley said.

For example, "sticklebacks vary i
'"/>

Source:


Page: 1 2 3 4 5

Related biology news :

1. Monkeying around to improve organ transplantation
2. Tropical Deforestation affects rainfall in the U.S. and around the globe
3. Tiny shock absorbers help bacteria stick around inside the body
4. Brazil creates buffer zone around coral reefs off Atlantic coast
5. Coming soon: 3-D imaging that flies through and around cancer
6. Extraordinary life found around deep-sea gas seeps
7. Evolution and the workaround
8. Ring-around-the-cell
9. WCS says avian flu prevention should focus on farms, markets
10. From hot springs to rice farms, scientists reveal new insights into the secret lives of archaea
11. ORNL, UC Berkeley unravel real-world clues to Earths mysteries
Post Your Comments:
(Date:8/28/2014)... , Aug. 28, 2014  Privacy Advocate and Senior ... Jennifer Lynch , joins the lineup of biometric and ... annual Biometrics UnPlugged Executive Summit in Tampa, ... Previously announced speakers include Steven Rahman, Director, Technology and ... Sector at Experian. The theme of this year,s event ...
(Date:8/28/2014)... production systems are good examples of complex systems. ... a networkincluding water for cooling, transport to supply ... Every step in the network chain is interconnected ... mutually dependent. A team of UK-based scientists has ... explored. The findings have been published in EPJ ...
(Date:8/28/2014)... will be built worldwide by 2050. Many of these ... bring an influx of destructive loggers, hunters and illegal ... a ,global roadmap, for prioritising road building across the ... development and environmental protection. , The map has two ... of ecosystems and a ,road-benefits, layer that estimates the ...
Breaking Biology News(10 mins):Biometrics UnPlugged Welcomes the Electronic Frontier Foundation's Jennifer Lynch to the Mobility at the Crossroads of Commerce and Privacy Summit 2Inter-dependent networks stress test 2Study shows where on the planet new roads should and should not go 2Study shows where on the planet new roads should and should not go 3
... people usually don,t die from a heart attack. But the ... succumb to congestive heart failure, the most common cause of ... hope for achieving what the body can,t do: mending broken ... built a scaffold that supports the growth and integration of ...
... -- A microscopic gene may play a gigantic role when ... to one Kansas State University research team. The team ... Disintegrin and Metalloprotease family, or ADAM family, and its role ... is a good guy or a bad guy in breast ...
... against cancerous tumors, radiation therapy often harms healthy tissue as ... of Tel Aviv University,s Department of Biomedical Engineering is developing ... and minimal damage to surrounding tissue. His innovative ... uses heat to kill the tumor cells but leaves ...
Cached Biology News:A strategy to fix a broken heart 2A strategy to fix a broken heart 3K-State research team investigates mutated gene's role in breast cancer 2A 'magnetic' solution to identify and kill tumors 2
(Date:8/28/2014)... August 28, 2014 The ability for ... culture that will allow individuals to perform at the ... important for employers looking to compete in this post–recession ... embracing this trend, as the sector increasingly focuses on ... company, which will have real results on the organization's ...
(Date:8/28/2014)... Sterlitech is proud to announce that ... stable of products . These additional products ... include membrane filters with surface charges. , ... for our membrane process testing equipment, and correspondingly, a ... membranes,” explains Sterlitech President Mark Spatz. “The addition ...
(Date:8/28/2014)... Washington, USA (PRWEB) August 27, 2014 ... next month for SPIE Laser Damage 2014 ... optical materials for high-power lasers will run 14-17 September. ... society for optics and photonics . , The premier ... for understanding laser damage to optical materials will engage ...
(Date:8/28/2014)... PrimeSource Building Products, Inc., a ... SoundConnect to support their communication needs with ... web conferencing platform GlobalMeet powered by SoundConnect. The ... SoundConnect delivers award winning “results driven” business ... will be utilizing GlobalMeet powered by SoundConnect ...
Breaking Biology Technology:Klein Hersh International Leads Philadelphia Area Life Science Industry in Company Culture 2Klein Hersh International Leads Philadelphia Area Life Science Industry in Company Culture 3Sterlitech Corporation Enhances Its Selection of Flat Sheet Membrane Filters 2Laser Damage to Draw Researchers, Engineers, Scientists to 46th Annual Conference 2Laser Damage to Draw Researchers, Engineers, Scientists to 46th Annual Conference 3PrimeSource Chooses SoundConnect as Collaboration Provider 2
... When the world's largest pharmaceutical company quit developing ... of Wisconsin-Madison researcher Hector DeLuca, the biochemist ... drug development firm. , ,In the beginning, it ... company, Deltanoid Pharmaceuticals , to address the ...
... Mequon, Wis. - Despite a slump in housing ... online mortgage-lending industry continues to build additions. , ,In ... in online transactions for first mortgages, mortgage refinances, home ... is poised to reach $22 million in revenue for ...
... you dropped the word sustainability in a crowd of ... have pegged you as an aging hippie, then scrambled ... to work. , ,Today, sustainability still carries some linguistic ... to talk because there's no avoiding a rational conversation. ...
Cached Biology Technology:Deltanoid presses on with drug research 2Mortgagebot builds online sales even as housing declines 2Mortgagebot builds online sales even as housing declines 3Mortgagebot builds online sales even as housing declines 4Re-engineering our economy to be sustainable and profitable 2Re-engineering our economy to be sustainable and profitable 3Re-engineering our economy to be sustainable and profitable 4
... LabWorks Software provides a comprehensive experiment based ... drop down menus yet sophisticated and powerful ... dozens of CCD cameras for easy image ... , Automated Digital Video Playback ...
... shaker flask clips, purpose-designed to firmly retain ... clips are equipped with a top retainer ... a bottom retainer spring, and silicon tubing ... glassware. Clips include the required mounting ...
... Plus DNA Polymerase with a proprietary thermostable ... fidelity than standard Taq DNA polymerase, Double ... Amplifies DNA templates >20kb, Concentration: 5U/ul, Applications: ... cloning and mutagenesis We are part of ...
... Methylation-specific PCR (MSP) is a new ... gene methylation utilizing small amounts of ... initial bisulfite reaction to modify the ... specific primers designed to distinguish methylated ...
Biology Products: