Navigation Links
Big brains are pricey, guppy study shows
Date:1/3/2013

Bigger brains can make animals, well, brainier, but that boost in brain size and ability comes at a price. That's according to new evidence reported on January 3rd in Current Biology, a Cell Press publication, in which researchers artificially selected guppies for large and small brain sizes.

The findings lend support to the notion that bigger brains and increased cognitive ability do go together, a topic that has been a matter of considerable debate in recent years, said Niclas Kolm of Uppsala University in Sweden. They also represent some of the first convincing evidence that large brains are expensive, evolutionarily speaking.

"We provide the first experimental evidence that evolving a larger brain really is costly in terms of both gut investment and, more importantly, reproductive output," Kolm said.

Together, the findings strongly support the idea that relative brain sizes among species are shaped through a balance between selection for increased cognitive ability and the costs of a big brain.

The results in guppies have important implications for us humans. After all, one of the most distinctive features of the human brain is its large size relative to the rest of the body.

"The human brain only makes up 2 percent of our total body mass but stands for 20 percent of our total energy demand," Kolm said. "It is a remarkably costly organ energetically."

But support for the so-called "expensive-tissue hypothesis"that there is a trade-off between the brain and the energy demands of other organs and reproductioncame only from comparative studies among species and were correlative in nature.

In the new study, Kolm's team took a different, within-species approach. They selected live-bearing guppies for large and small brains relative to the size of their bodies. Under that strong selection pressure, they found that brain size could evolve "remarkably quickly."

After selection, large-br
'/>"/>

Contact: Mary Beth O'Leary
moleary@cell.com
617-397-2802
Cell Press
Source:Eurekalert

Page: 1 2

Related biology news :

1. Musical duets lock brains as well as rhythms
2. Primates brains make visual maps using triangular grids
3. Preemies brains reap long-term benefits from Kangaroo Mother Care
4. Mice with big brains provide insight into brain regeneration and developmental disorders
5. University of Alberta led research may have discovered how memories are encoded in our brains
6. Hebrew University study finds key mechanism in calcium regulation
7. New study documents the natural relationship between CO2 concentrations and sea level
8. Stowers study hints that stem cells prepare for maturity much earlier than anticipated
9. Birdsong study pecks theory that music is uniquely human
10. Study turns parasite invasion theory on its head
11. Gout study offers genetic insight into disease of kings
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/17/2015)... 2015 Increasing adoption ... advancement to drive biometric systems market in ... According to a recently released TechSci ... ", biometric systems market in Saudi ... at CAGR of over 22% through 2020. The ...
(Date:4/13/2015)... 13, 2015 According to ... Biometrics Market Forecast & Opportunities, 2020", the global biometrics ... around 14% till 2020. The biometrics market is ... implementation and review of biometric management systems. The ... products with greater efficiency, are resulting in increasing ...
(Date:4/9/2015)... , April 9, 2015 Synaptics Inc. (NASDAQ: ... solutions, announced today that it will report financial results ... April 23, 2015, after the close of market. The ... and investors at 2:00 p.m. PT (5:00 p.m. ET), ... To participate on the live call, analysts and ...
Breaking Biology News(10 mins):Saudi Arabia Biometric Systems Market to Grow at 22% Through 2020, Says TechSci Research 2Saudi Arabia Biometric Systems Market to Grow at 22% Through 2020, Says TechSci Research 3Global Biometrics Market to Cross US$ 21 Billion by 2020: TechSci Research 2Synaptics to Report Third Quarter Results on April 23 2
... to two-thirds of Earth,s permafrost likely will disappear by ... quantities of carbon into the atmosphere, says a new ... for Research in Environmental Sciences. The ... to thaw in high latitudes from warming temperatures, which ...
... CHAMPAIGN, lll. University of Illinois animal sciences professor ... Prize in Agriculture. He shares the prize with James ... Wolf Prizes are awarded each year, with recipients in ... prize committee selected Lewin for his "highly significant discoveries" ...
... proteins in the blood of pregnant women that could be ... in discovery of biomarkers that seem to be specific enough ... a new study in ACS,s Journal of Proteome Research ... happens when an embryo does not attach normally inside the ...
Cached Biology News:Thawing permafrost likely will accelerate global warming 2Thawing permafrost likely will accelerate global warming 3Illinois professor awarded 2011 Wolf Prize in Agriculture 2
(Date:5/4/2015)... , May 4, 2015 /PRNewswire/ - The ... partners are pleased to announce the formation of ... on developing treatments for cancer that harness the ... represents a unique collaboration between the Children,s Hospital ... Research Institute, McMaster University, the Ontario Institute for ...
(Date:5/4/2015)... (PRWEB) May 04, 2015 Achieved primarily ... produces slides that boast 10 to 100x better detail ... the capabilities of all existing light microscopy methods, it ... micrographs were chosen as the frame of reference because ... , The goal from the earliest discovery days ...
(Date:5/4/2015)... 4, 2015 - New Massive ... students prepare for the United States Medical Licensing Examination ... scientific, technical and medical information products and services, announced ... Open Online Course) designed to help medical students prepare ... 1, the first and most daunting of the three ...
(Date:5/4/2015)... ALISO VIEJO, Calif. , May 4, 2015 /PRNewswire/ ... to eliminate preventable hospitalizations, has teamed with the ... effect of Sentrian technology on 1,000 patients with chronic ... nearly 13 million Americans and is the nation,s third ... plan members of CareMore Health System , a ...
Breaking Biology Technology:Turnstone Biologics Inc. to accelerate clinical and commercial translation of cancer immunotherapies 2Turnstone Biologics Inc. to accelerate clinical and commercial translation of cancer immunotherapies 3Elsevier's Free MOOC Prepares Med Students for Licensing Exam 2Elsevier's Free MOOC Prepares Med Students for Licensing Exam 3CareMore, Scripps Translational Science Institute, and Sentrian Launch Landmark Study of Remote Patient Monitoring for COPD Population 2CareMore, Scripps Translational Science Institute, and Sentrian Launch Landmark Study of Remote Patient Monitoring for COPD Population 3CareMore, Scripps Translational Science Institute, and Sentrian Launch Landmark Study of Remote Patient Monitoring for COPD Population 4CareMore, Scripps Translational Science Institute, and Sentrian Launch Landmark Study of Remote Patient Monitoring for COPD Population 5
... a three-year Phase II small business innovation research ... Institute for Environmental Health Sciences. , ,The grant ... for the measurement of low-dose, cumulative exposure to ... sensitive, inexpensive, rugged and suitable for studies involving ...
... heavy damage from Hurricane Charley, which threatened Tampa, Fla., ... Carolina. Source: Beau McCune. MADISON Insurance companies ... to speed claims processing for disaster victims. These companies ... process their portion of the $7.4 billion in losses ...
... argue about improvement. Motherhood, apple pie, the Packers, Badgers and ... apt to cause a fight after a few beers. Everyone ... things worse the next time. Einstein's theory of human nature ... defined insanity as doing the same things over and over ...
Cached Biology Technology:Wisconsins insurance companies use advanced IT to speed relief 2Wisconsins insurance companies use advanced IT to speed relief 3The Real World 2The Real World 3
... synthetic peptide whose sequence corresponds to residues 1-18 from rat rab ... terminus): M(1) - A - S - A - S - ... - R - D - A - A - D - ... neutralization and control experiments with the polyclonal antibody that reacts with ...
... RNA sequences from high throughput synthesis are new ... LC Sciences. These products provide a large number ... sequences delivered in a microtube as a mixture ... verified RNA sequence. This is a custom product ...
... gold standard for automated bioresearch: Developed ... applications • Based on decades of ... accessories designed for bioresearch • Holographic ... Versatility, reliability and ease-of-use • Pulsed ...
... Acuity is the complete enterprise microarray informatics platform ... analysis. Buy Acuity once and use it forever ... Tools for Quality Acuity has all the ... from your data, from quality control statistics and ...
Biology Products: