Navigation Links
Natural selection for moderate testosterone surprises scientists
Date:5/4/2010

in relation to all the other individuals in a population. This study suggests that when it comes to testosterone and the behaviors it controls, moderation helps provide this competitive edge.

"These findings represent the culmination of 20-plus years of research directed towards understanding how variability in male testosterone relates to Darwinian fitness, and the outcome is deeply satisfying," said Ketterson, a principal investigator and coauthor. "Initially we took an experimental approach, which revealed that chronic elevation of testosterone reduced lifespan in the junco. But the story could not be complete without knowing whether males with naturally high or low levels of testosterone were at a survival advantage or disadvantage. Much of the literature on testosterone suggests that more is better. Our studies, experimental and correlational, now show that while 'high-T males', as we call them, may sometimes benefit in reproduction, too much testosterone leads to lower survival, and it's the average male that is the best performer."


'/>"/>

Contact: David Bricker
brickerd@indiana.edu
812-856-9035
Indiana University
Source:Eurekalert  

Page: 1 2 3 4

Related biology news :

1. Academy of Natural Sciences honors Pa. naturalist for excellence in communicating science to public
2. Natural S-Equol suggested as critical component in SE5-OH for reducing menopausal hot flushes
3. Critical record of Afghanistans natural heritage blooms again
4. Soy germ-based supplement SE5-OH containing natural S-Equol examined for safety, hormonal influence
5. Breathe easy: A natural fruit compound may help asthma
6. The quality of the tomato depends more on temperature than on natural light
7. University of Colorado study shows natural antioxidants give top barn swallows a leg on competitors
8. Intelligent people have unnatural preferences and values that are novel in human evolution
9. French and Spanish researchers develop a natural alternative to antibiotics in animal feed
10. Sanford-Burnham scientists identify natural compound that inhibits cancer cell migration
11. Tracing natural hazards by taking Earths pulse
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Natural selection for moderate testosterone surprises scientists
(Date:2/13/2015)... 13, 2015 ACT Genomics Co., Ltd., ... to transform cancer genomic information into precision diagnosis ... has raised US$ 8 million in the its first ... Taipei, Taiwan , ACT Genomics has ... the aim to implement next generation sequencing (NGS) ...
(Date:2/12/2015)... -- NXT-ID, Inc. (NASDAQ: NXTD and ... focused on the growing mobile commerce market, announced today ... DISTRIBUTED METHOD AND SYSTEM TO IMPROVE COLLABORATIVE SERVICES ... NXT-ID,s position in the emerging "Internet of Things" by ... multiple devices to collaborate with one another to improve ...
(Date:2/10/2015)... Mass., Feb. 10, 2015  Alere Inc. (NYSE: ... its financial results for the quarter ended December ... Officer and President of Alere said, "We made ... Alere as the global leader in rapid diagnostics ... the Alere Health divestiture in early January enabled ...
Breaking Biology News(10 mins):ACT Genomics Raises $8 Million in its First Private Funding Round 2NXT-ID Patents Collaborative Services to Enable the "Internet of Things" 2NXT-ID Patents Collaborative Services to Enable the "Internet of Things" 3Alere Inc. Announces Fourth Quarter 2014 Results 2Alere Inc. Announces Fourth Quarter 2014 Results 3Alere Inc. Announces Fourth Quarter 2014 Results 4Alere Inc. Announces Fourth Quarter 2014 Results 5Alere Inc. Announces Fourth Quarter 2014 Results 6Alere Inc. Announces Fourth Quarter 2014 Results 7Alere Inc. Announces Fourth Quarter 2014 Results 8Alere Inc. Announces Fourth Quarter 2014 Results 9Alere Inc. Announces Fourth Quarter 2014 Results 10Alere Inc. Announces Fourth Quarter 2014 Results 11Alere Inc. Announces Fourth Quarter 2014 Results 12Alere Inc. Announces Fourth Quarter 2014 Results 13Alere Inc. Announces Fourth Quarter 2014 Results 14Alere Inc. Announces Fourth Quarter 2014 Results 15Alere Inc. Announces Fourth Quarter 2014 Results 16Alere Inc. Announces Fourth Quarter 2014 Results 17Alere Inc. Announces Fourth Quarter 2014 Results 18Alere Inc. Announces Fourth Quarter 2014 Results 19Alere Inc. Announces Fourth Quarter 2014 Results 20Alere Inc. Announces Fourth Quarter 2014 Results 21Alere Inc. Announces Fourth Quarter 2014 Results 22Alere Inc. Announces Fourth Quarter 2014 Results 23Alere Inc. Announces Fourth Quarter 2014 Results 24Alere Inc. Announces Fourth Quarter 2014 Results 25Alere Inc. Announces Fourth Quarter 2014 Results 26Alere Inc. Announces Fourth Quarter 2014 Results 27Alere Inc. Announces Fourth Quarter 2014 Results 28Alere Inc. Announces Fourth Quarter 2014 Results 29Alere Inc. Announces Fourth Quarter 2014 Results 30Alere Inc. Announces Fourth Quarter 2014 Results 31Alere Inc. Announces Fourth Quarter 2014 Results 32Alere Inc. Announces Fourth Quarter 2014 Results 33
... nurses, and firefighters essential during a severe pandemic influenza ... and utility workers. That,s the conclusion of a Johns ... of Biosecurity and Bioterrorism . The report, led ... for the Johns Hopkins Berman Institute of Bioethics, provides ...
... neuroblastoma and melanoma developed by scientists and ... collaboration with investigators from the University of Iowa is ... to new research published in the October edition of ... vaccine uses the tumor,s own protein to induce an ...
... fossils revealed a herd of dinosaurs that perished in ... are characterized by a bony frill on the back ... had large bony structures above their nose and eyes ... structures probably supported horns of keratin. According to ...
Cached Biology News:Rethinking who should be considered 'essential' during a pandemic flu outbreak 2Children's National researchers develop novel anti-tumor vaccine 2A new dinosaur species, Pachyrhinosaur lakustai, unveiled from Pipestone Creek, Alberta, Canada 2
(Date:3/4/2015)... /CNW/ - Resverlogix Corp. (TSX:RVX) (the "Company") today ... research program with Emerald Logic, a leader ... Technology (FACET), Emerald Logic analyzed Resverlogix,s complete ... each of 798 patients who participated in ... SUSTAIN and ASSURE. The objective of this ...
(Date:3/4/2015)... Irvine, CA (PRWEB) March 04, 2015 ... research leader in Personalized Medicine, is excited to ... “Incorporating Genetic Testing to Optimize the Management of ... be available at Medscape.com for the next year. ... medical professionals how to recognize inadequate pain treatments, ...
(Date:3/4/2015)... , March 4, 2015  BioClinica®, ... and technology provider, today announced that clinical ... countries convened at its annual European User ... to discuss the use of its ... BioClinica,s eClinical technologies include: the Microsoft Office-Smart ...
(Date:3/4/2015)... March 04, 2015 Follow us ... one of the fastest growing technologies in the life ... subcellular visualization is driving growth in nucleic acid detection ... understanding of gene expressions will continue to benefit the ... in fields ranging from pharma, biotech, food & beverage ...
Breaking Biology Technology:Resverlogix Collaborates with Emerald Logic to Identify Factors Driving Drug Response and Efficacy in Phase 2 Program 2Resverlogix Collaborates with Emerald Logic to Identify Factors Driving Drug Response and Efficacy in Phase 2 Program 3Resverlogix Collaborates with Emerald Logic to Identify Factors Driving Drug Response and Efficacy in Phase 2 Program 4Proove Biosciences Launches CME Accredited Program with Medscape 2Proove Biosciences Launches CME Accredited Program with Medscape 3BioClinica Teams With Pharma To Tackle Clinical Trial Challenges In Europe 2BioClinica Teams With Pharma To Tackle Clinical Trial Challenges In Europe 3Focus on Quantifying Nucleic Acid Molecules Spurs Growth in the qPCR & dPCR Instrumentation Market, According to a New Report by Global Industry Analysts, Inc. 2Focus on Quantifying Nucleic Acid Molecules Spurs Growth in the qPCR & dPCR Instrumentation Market, According to a New Report by Global Industry Analysts, Inc. 3Focus on Quantifying Nucleic Acid Molecules Spurs Growth in the qPCR & dPCR Instrumentation Market, According to a New Report by Global Industry Analysts, Inc. 4
... and VANCOUVER, April 30 /PRNewswire-FirstCall/ - OncoGenex Pharmaceuticals (NASDAQ: ... first quarter financial results will be released on Thursday ... a conference call and live webcast at 4:30 p.m. ... quarter results and provide an update on the business ...
... million grants, scientists and engineers aim to revolutionize solar ... of greenhouse gases as part of two Energy Frontier ... at Austin by the U.S. Department of Energy (DOE). ... new EFRCs nationally in conjunction with a speech delivered ...
... Huge GSK, Novartis, Merck plants help define state,s ... The global fight against swine flu is shining ... biomanufacturing.Global pharmaceutical giant GlaxoSmithKline, with North American headquarters ... world,s two key manufacturers of antiviral flu treatments. ...
Cached Biology Technology:Solar cells, geological storage research receive DOE funding at the University of Texas at Austin 2Solar cells, geological storage research receive DOE funding at the University of Texas at Austin 3NC Biomanufacturers Supply Defense for World vs. Flu 2
... Super Sensitive MultiLink IHC Detection ... secondary antibodies, labeled with multiple ... the bound primary antibody, and ... Streptavidin-Enzyme conjugate. This kit is ...
Sf21 Insect Cells (Live) in Max-XP Medium...
EZ-DeWax is a one-step solution that simultanously removes paraffin from and rehydrates formalin-fixed, paraffin embedded tissue...
... unit is an inexpensive personal or mini thermal ... process. Lightweight, with a small footprint, it can ... the researcher's desk. , The Gene Cycler thermal ... not have access to a large laboratory thermal ...
Biology Products: