Navigation Links
Fish evolve a longer lifespan by evolving a longer reproductive period, researchers find

A UC Riverside-led research team has found that as some populations of an organism evolve a longer lifespan, they do so by increasing only that segment of the lifespan that contributes to "fitness" ?the relative ability of an individual to contribute offspring to the next generation.

Focusing on guppies, small fresh-water fish biologists have studied for long, the researchers found that guppies living in environments with a large number of predators have adapted to reproduce earlier in life than guppies from low-predation localities. Moreover, when reproduction ceases, guppies from high-predation localities are far older, on average, than guppies from low-predation localities, indicating that high-predation guppies enjoy a long "reproductive period" ?the time between first and last reproduction.

"In earlier work, we showed that guppies from high predation environments have longer lifespans," said David Reznick, professor of biology. "Our new study explores how and why this happens. We found that fish from populations enjoying longer lifespans live longer because there is a selective increase in their reproductive lifespan. Indeed, theory predicts this result because only reproductive lifespan determines fitness."

Study results appear Dec. 27 in the online edition of the Public Library of Science ?Biology.

The study supports the controversial hypothesis that natural selection ?the process in nature by which only organisms best adapted to their environment tend to survive and pass on their genetic characters in increasing numbers to succeeding generations ?introduces changes in only a specific segment of an organism's lifespan.

The researchers conducted their experiments by comparing life-history traits in 240 guppies they retrieved from high- and low-predation streams in mountains in Trini
'"/>

Source:University of California - Riverside


Page: 1 2

Related biology news :

1. Scientists discover how fish evolved to float at different sea depths
2. Immune system has evolved to prevent autoimmune disease
3. MBL researchers probe how an ancient microbe thrives and evolves without sex
4. Fitting in: Newly evolved genes adopt a variety of strategies to remain in the gene pool
5. Cancer support cells may evolve, fuel tumor growth, study shows
6. Sociality of sweat bees evolved simultaneously during climate change
7. Scientists force viruses to evolve as better delivery vehicles for gene therapy
8. Mussels evolve quickly to defend against invasive crabs
9. How did cactuses evolve?
10. New clues to how sex evolves
11. How did bilaterally symmetric flowers evolve from radially symmetric ones?
Post Your Comments:
(Date:4/14/2015)... 2015  HYPR Corp. today announced it has ... Alliance tm , an industry consortium transforming online ... share technology and collaborate to deliver open specifications ... secure and private, and easier to use. ... protects sensitive user information and eliminates the dependency ...
(Date:4/10/2015)... DUBLIN , April 10, 2015 ... the addition of the "Security Competitive Profiles - ... (Logo: http://photos.prnewswire.com/prnh/20130307/600769) , NEC will continue to ... solutions to the market, with a company focus on ... solution anticipated. Winning opportunities in the ...
(Date:4/2/2015)... 2015 In the current ... outperforms the strongest competitors, showing outstanding performance in ... system is capable of a throughput of 5.000.000 ... to be ten times faster than most competitors ...      (Photo: http://photos.prnewswire.com/prnh/20150402/738673-a ) ...
Breaking Biology News(10 mins):HYPR Corp. Joins the FIDO Alliance 2HYPR Corp. Joins the FIDO Alliance 3NEC Security Competitive Profile 2015 2DERMALOG AFIS Emerges as Performance Winner in NIST Benchmark Test 2DERMALOG AFIS Emerges as Performance Winner in NIST Benchmark Test 3
... its altitude, ozone can be either friend or foe. ... scientists will now have a better understanding of ozone, its origin ... polluting our atmosphere. Ozone is a colourless, toxic gas named ... In the stratosphere, acting as friend, ...
... wildflower, grows from the Mississippi River to Arizona and ... plant can be seen covering large areas of plains, ... Working to create a new drought-resistant and water-saving ... and Soil Science have introduced ,Raider Amethyst, a new ...
... a page from Nature herself, a team of researchers ... from the atmosphere and place it in the Earth,s ... the new technology does not make the oceans more ... process is a manipulation of the natural weathering of ...
Cached Biology News:Ozone intrusions -- humankind's fault? 2Scientists enhance Mother Nature's carbon handling mechanism 2
(Date:5/1/2015)... 2015 Investor-Edge has initiated ... (NASDAQ: GENE ), Agilent Technologies Inc. (NYSE: ... TMO ), Sequenom Inc. (NASDAQ: SQNM ... Free research report on Genetic Technologies can be ... 30, 2015, the NASDAQ Composite ended at 4,941.42, ...
(Date:4/30/2015)... South Carolina (PRWEB) May 01, 2015 ... system services, is extremely proud to announce that for ... been named as a winner of a Queen’s Award ... success for the design and manufacture of a unique ... is the revolutionary alternative to traditional steam flow measurement. ...
(Date:4/30/2015)... , April 30, 2015 /PRNewswire/ - BioAmber Inc. (NYSE: ... chemicals, today announced that it has commenced an underwritten public ... to grant the underwriters a 30-day option to purchase ... of common stock offered in the public offering. The ... be no assurance as to whether or when the ...
(Date:4/30/2015)... Budapest, Hungary (PRWEB) April 30, 2015 ... electronic lab notebook with integrated protocols and specimen ... chemistry software solutions and consulting services for life ... the development of Labguru’s newest feature: chemical structure ... deep domain features for biologists, bio-chemists, and more, ...
Breaking Biology Technology:Life Sciences Tools and Services Stocks on our Radar -- Genetic Technologies, Agilent Technologies, Thermo Fisher Scientific, Sequenom, and PerkinElmer 2Life Sciences Tools and Services Stocks on our Radar -- Genetic Technologies, Agilent Technologies, Thermo Fisher Scientific, Sequenom, and PerkinElmer 3Life Sciences Tools and Services Stocks on our Radar -- Genetic Technologies, Agilent Technologies, Thermo Fisher Scientific, Sequenom, and PerkinElmer 4Life Sciences Tools and Services Stocks on our Radar -- Genetic Technologies, Agilent Technologies, Thermo Fisher Scientific, Sequenom, and PerkinElmer 5Spirax Sarco Receives a Queen’s Award for Innovation 2Spirax Sarco Receives a Queen’s Award for Innovation 3BioAmber Inc. Announces Public Offering Of Common Stock 2BioAmber Inc. Announces Public Offering Of Common Stock 3Labguru Integrates ChemAxon's Marvin JS, to Enhance Functionality for Chemists 2
... York, May 26, 2012 Sanofi ... Regeneron Pharmaceuticals, Inc. (NASDAQ: REGN ) today ... trial of SAR236553/REGN727 (Study 1003, NTC01266876) in patients ... subcutaneously administered, fully-human antibody targeting PCSK9 (proprotein convertase ...
... decades, neurologists have known that a diet high in fat ... resist drug therapy. But how the diet worked, and why, ... York Times Magazine called it "Epilepsy,s Big, Fat Miracle." ... School have proposed an answer, linking resistance to seizures to ...
... growth of crystals, do nanoparticles act as "artificial atoms" ... structures? This is the contention of a major but ... researchers at the U.S. Department of Energy (DOE),s Lawrence ... and point the way to energy devices of the ...
Cached Biology Technology:Sanofi and Regeneron Announce Publication of Positive Phase 2 Results for Lipid-Lowering PCSK9 Antibody in The Lancet 2Sanofi and Regeneron Announce Publication of Positive Phase 2 Results for Lipid-Lowering PCSK9 Antibody in The Lancet 3Sanofi and Regeneron Announce Publication of Positive Phase 2 Results for Lipid-Lowering PCSK9 Antibody in The Lancet 4Sanofi and Regeneron Announce Publication of Positive Phase 2 Results for Lipid-Lowering PCSK9 Antibody in The Lancet 5Sanofi and Regeneron Announce Publication of Positive Phase 2 Results for Lipid-Lowering PCSK9 Antibody in The Lancet 6Sanofi and Regeneron Announce Publication of Positive Phase 2 Results for Lipid-Lowering PCSK9 Antibody in The Lancet 7Sanofi and Regeneron Announce Publication of Positive Phase 2 Results for Lipid-Lowering PCSK9 Antibody in The Lancet 8Sanofi and Regeneron Announce Publication of Positive Phase 2 Results for Lipid-Lowering PCSK9 Antibody in The Lancet 9Reverse engineering epilepsy's 'miracle' diet 2Reverse engineering epilepsy's 'miracle' diet 3Nanoparticles seen as artificial atoms 2Nanoparticles seen as artificial atoms 3
TXNL2 Antibody...
Mouse monoclonal [3F8 ] to smooth muscle Myosin heavy chain I ( Abpromise for all tested applications). entrezGeneID: 4629 SwissProtID: P35749...
Request Info...
Goat polyclonal to SART1 ( Abpromise for all tested applications). Antigen: Synthetic peptide: GSSKKHRGEKEAA, corresponding to N terminal amino acids 2-14 of Human SART1. Entrez Gene ID: 909...
Biology Products: