Navigation Links
Low testosterone level in Amazonian tribe responds to competition
Date:3/28/2012

Santa Barbara, Calif. As part of an isolated indigenous group in central Bolivia, Tsimane men spend much of their time hunting, foraging, fishing, and clearing land by hand to grow crops. Their ability to maintain the physical activity required to survive each day might imply they have higher than average male testosterone levels.

Anthropologists at UC Santa Barbara and the University of Washington have found, however, that the baseline testosterone level of Tsimane men is 33 percent lower than that of men living in the United States, where life is physically less demanding. Also, in contrast to men in the U.S., the Bolivian foragers-farmers do not show declines in testosterone as they age. The researchers' findings appear today in the Proceedings of the Royal Society B.

According to Michael Gurven, the lives of the Tsimane offer a glimpse of how humans survived before industrialization and modern amenities. "Our lifestyle is now an anomaly, a major departure from our species' long-term existence as hunter-gatherers," said Gurven, professor of anthropology at UCSB and co-author of the paper. Gurven is also co-director of the Tsimane Health and Life History Project, a collaboration between UCSB and the University of New Mexico.

"Maintaining high levels of testosterone compromises the immune system, so it makes sense to keep it low in environments where parasites and pathogens are rampant, as they are where the Tsimane live," said Ben Trumble, a graduate student in anthropology at the University of Washington, and the paper's lead author.

That men living in the U.S. have greater levels of circulating testosterone represents an "evolutionarily novel spike," Trumble continued. The spike reflects how low levels of pathogens and parasites in the U.S. and other industrialized countries allow men to maintain higher testosterone levels without risk of infection. He also pointed out that while men in the U.S. show a decline in
'/>"/>

Contact: Andrea Estrada
andrea.estrada@ia.ucsb.edu
805-893-4620
University of California - Santa Barbara
Source:Eurekalert  

Page: 1 2

Related medicine news :

1. Too Much Testosterone Linked to Inflated Ego: Study
2. Testosterone Exposure May Explain Boys Language Delay
3. Hanging with the boys - female Alpine marmots benefit from a bit of pre-natal testosterone
4. For Older Men, Lowered Testosterone May Mean Muscle Loss
5. Older men with higher testosterone levels lose less muscle mass as they age
6. Research Suggests Penis Might Produce Testosterone
7. Testosterone Levels Seem to Fall With Fatherhood
8. BUSM: Testosterone deficiency and replacement therapy in men
9. Low testosterone linked to varicoceles
10. Surgery-related weight loss in men reverses testosterone deficiency
11. Study suggests another look at testosterone-prostate cancer link
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Low testosterone level in Amazonian tribe responds to competition
(Date:10/20/2014)... 2014 AttorneyOne.com, a recognized authority on law, ... the FDA on Sit and Slim II . ... purchase or use Sit and Slim II because it contains ... promoted as weight loss product on various websites and possibly ... in 2010 for safety reasons, can significantly increase blood pressure ...
(Date:10/20/2014)... 20, 2014 National Teen Driver Safety Week ... American Academy of Pediatrics (Ohio AAP, http://www.ohioaap.org ) is ... parents of teen drivers to talk to their teens and ... Motor vehicle crashes are the leading cause of death for ... in fatal crashes, and 859 (42%) of those teen drivers ...
(Date:10/20/2014)... 20, 2014 Houston plastic surgeon ... key elements of his innovative True Form Tummy ... surgery residents and faculty at The University of ... too, was once a medical student. Patronella, who is ... cosmetic plastic surgery practices in Texas, The Aesthetic ...
(Date:10/19/2014)... UNITED NATIONS, New York (PRWEB) October 19, 2014 ... the United Nations Population Fund, welcomes news of a ... release of the more than 200 girls who were ... Girls. "These girls have languished in captivity long enough, ... their families, schools and communities," stated Dr. Osotimehin. , ...
(Date:10/19/2014)... (PRWEB) October 20, 2014 SweetDressy.com, a ... recently announced its promotion for long evening dresses ... enjoy the special offer; the current discount is up ... of the industry pioneers in the fashion field. Its ... for ladies dwelling in various parts of the world. ...
Breaking Medicine News(10 mins):Health News:FDA Advises Not to Use Sit and Slim II: AttorneyOne Monitors and Keeps Consumers Informed 2Health News:Ohio AAP Promotes National Teen Driver Safety Week 2Health News:Plastic Surgeon Patronella Presents Artistically-Inspired Tummy Tuck Method to Future Generation of Plastic Surgeons in Texas 2Health News:Promotion For Beautiful Long Evening Dresses Launched By SweetDressy.com 2
... who do not have osteoporosis , , FRIDAY, Jan. 18 ... downplay the risks of prescribing bone-strengthening drugs for women ... osteoporosis, a new report claims. , Drugs such as ... fractures of women with osteoporosis, according to the article ...
... funding promotes diabetes care improvement at a community-level, ... throughout the,U.S. in implementing and evaluating models for ... Business Coalition on Health,(NBCH) announced the recipients of ... for NBCH member coalitions -- intended to support ...
... JOSE, Calif., Jan. 18 VNUS(R) Medical,Technologies, Inc. (Nasdaq: ... the minimally invasive treatment of venous reflux disease, today,announced ... and,Vice President of Finance and Administration., Mr. Osborne ... in,various senior leadership roles. Mr. Osborne had served as ...
... M.D., distinguished professor of microbiology and immunology and of ... of Yeshiva University, has received the second annual Marshall ... a special ceremony at the medical school. , ... long-time member of the Einstein faculty, Marshall S. Horwitz, ...
... Antipolis, France ---Bridging the unacceptable gap between what is ... the prevention of cardiovascular disease is how Prof Guy ... of the European Society of Cardiology (ESC), summarises the ... , Creating incentives for people to make healthy ...
... to detect surface cancers quickly and painlessly using ... composition has been developed by a QUT PhD ... School of Physical and Chemical Sciences has developed ... diagnose cervical and skin cancers. , Bioimpedance measures ...
Cached Medicine News:Health News:Bone-Strengthening Drugs May Be Overprescribed 2Health News:Bone-Strengthening Drugs May Be Overprescribed 3Health News:National Business Coalition on Health Awards Grants to 14 Coalitions for Diabetes Quality Programs 2Health News:National Business Coalition on Health Awards Grants to 14 Coalitions for Diabetes Quality Programs 3Health News:VNUS Medical Technologies Appoints Peter Osborne as Chief Financial Officer 2Health News:Einstein honors Dr. Stanley Nathenson with Marshall S. Horwitz Faculty Prize for Research Excellence 2Health News:European Summit on Cardiovascular Disease Prevention 2
(Date:10/17/2014)... October 17, 2014 Investor-Edge has ... (NASDAQ: ARNA ), NPS Pharmaceuticals Inc. (NASDAQ: ... XOMA ), Momenta Pharmaceuticals Inc. (NASDAQ: MNTA ... research on these five companies can be accessed at: ... Thursday, October 16, 2014, ended on a mixed note ...
(Date:10/17/2014)... -- UBM Medica US announces that Endocrinology Network , ... who treat patients with type 2 diabetes ... insulin .  Nearly all patients with ... – daily injections of one or more insulin formulations—to ... of pancreatic beta cells. Insulin is a very effective ...
(Date:10/17/2014)...  China Biologic Products, Inc. (NASDAQ: CBPO, "China ... plasma-based biopharmaceutical company in China ... approval from the China Food and Drug Administration ... complex concentrate ("PCC") at its Shandong Taibang facility. ... production facility for Good Manufacturing Practices ("GMP") compliance ...
Breaking Medicine Technology:Biotech Equities Technical Briefing - Arena Pharma, NPS Pharma, XOMA, Momenta Pharma, and Catalyst Pharma Partners 2Biotech Equities Technical Briefing - Arena Pharma, NPS Pharma, XOMA, Momenta Pharma, and Catalyst Pharma Partners 3Biotech Equities Technical Briefing - Arena Pharma, NPS Pharma, XOMA, Momenta Pharma, and Catalyst Pharma Partners 4Biotech Equities Technical Briefing - Arena Pharma, NPS Pharma, XOMA, Momenta Pharma, and Catalyst Pharma Partners 5Endocrinology Network Features Special Coverage on Effective Use of Insulin 2Endocrinology Network Features Special Coverage on Effective Use of Insulin 3China Biologic Receives Approval for Commercial Manufacturing of Human Prothrombin Complex Concentrate at Shandong Taibang Facility 2China Biologic Receives Approval for Commercial Manufacturing of Human Prothrombin Complex Concentrate at Shandong Taibang Facility 3
... Laser,Centers, the largest provider of laser hair removal ... the addition of the VelaShape,cellulite reduction and body ... 30 additional locations before the end of March, ... FDA-approved for both cellulite,reduction and circumferential reduction of ...
... has,received its third $10 million tranche of equity funding ... milestones:,validating the efficacy and safety of its two topical ... influenza vaccine in,ferret studies., The company, a spin-off ... $30 million over the past 18 months from Perseus ...
Cached Medicine Technology:American Laser Center Offers VelaShape Body Shaping and Cellulite Reduction Treatment 2NanoBio(R) Corporation Completes $30 Million in Equity Funding by Meeting Key Development Milestones 2
Woodlyn Lensmeter is designed to be used in either a prescription laboratory setting or professional office. Its titable position angle offers personal comfort. The easily operated marking device pro...
Nidek Fundus Camera NM-200D's compact, lightweight body with user-friendly color touch screen display provides more options to treat more patients, and is more comfortable to use....
... high resolution 1640 x 1280 digital ... - digital achieves new levels of ... use. Now supplied complete with Kowa's ... image and patient management software this ...
The quick access to diabetic screening, panoramic images of the retina including peripheral area are available by using easy, semi automatic guidance of peripheral fixation....
Medicine Products: