Navigation Links
Environmental cues control reproductive timing and longevity, University of Minnesota study shows
Date:6/25/2009

When humans and animals delay reproduction because food or other resources are scarce, they may live longer to increase the impact of reproduction, according to a new study by University of Minnesota researchers published in the June 25 issue of PLoS (Public Library of Science) One.

The discovery, which explains why starvation can lead to longer life, has important implications for improving human health and lengthening lifespan.

The basic premise is that individuals use environmental cues to predict population declines, causing them to delay reproduction until the decline has occurred, when each offspring will make a bigger contribution to the gene pool. Conversely, if bad times turn to good times and the population is on the verge of a boom, reproducing sooner rather than later will help their genes thrive.

"If the population is decreasing, future kids make a bigger splash in the gene pool than current kids," explains Will Ratcliff, a College of Biological Sciences graduate student who came up with the idea for the study. "So, if there are tradeoffs between current and future reproduction, delaying reproduction can be a good idea, even if it reduces the number of kids you have during your lifetime."

Fluctuations in testosterone levels provide an example of how the environment and organisms interact to guide reproduction, explains R. Ford Denison, adjunct professor in the College of Biological Sciences and Ratcliff's adviser. Testosterone suppresses the immune system. So when environmental conditions trigger high levels, reproduction is high but longevity drops.

Environmental factors also control the age of menarche. In African countries with chronic food shortages, girls experience menarche much later than in the U.S., where rich diets trigger early menarche. Food scarcity is a signal that population is likely to decline, so reproduction is delayed, while an abundance of rich food signals an increase, causin
'/>"/>

Contact: Patty Mattern
612-624-2801
University of Minnesota
Source:Eurekalert

Page: 1 2

Related biology news :

1. Study finds environmental tests help predict hospital-acquired Legionnaires disease risk
2. Genes, Environment and Health Initiative invests in genetic studies, environmental monitoring
3. UCR engineers to develop new tool to measure how environmental exposures affect health
4. TAU scientists probe deep questions aboard EcoOceans environmental research ship
5. Environmental setting of human migrations in the circum-Pacific Region
6. UC-Riverside partners with Chinese university to address Chinas environmental problems
7. Food and environmental sustainability focus of ASA-CSSA-SSSA Annual Meetings
8. Relationship between environmental stress and cancer elucidated
9. Environmental researchers propose radical human-centric map of the world
10. New journal Energy & Environmental Science to be launched by RSC Publishing
11. Environmental exodus
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/11/2014)... July 3, 2014, Shenzhen, China Researchers from Salk ... for the first time evaluated the safety and ... and successfully developed a new method, TALEN-HDAdV, which ... pluripotent stem cell (hiPSC). This study published online ... important theoretical foundation for stem cell-based gene therapy. ...
(Date:7/11/2014)... Researchers have pioneered a revolutionary new way to ... Virtual Finger, allows scientists to move through digital ... using the flat surface of their computer screens. ... orders of magnitude more efficient, saving time, money ... areas of experimental biology. The software and its ...
(Date:7/11/2014)... that under the normal circumstances, astrocytes participate ... neuronal environment, and exhibit therapeutic and repairing ... Previous studies have found that nerve cells ... induction have reduced viability, which produces influences ... Yuan, Kailuan General Hospital, Hebei United University, ...
Breaking Biology News(10 mins):A new genome editing method brings the possibility of gene therapies closer to reality 2Virtual finger enables scientists to navigate and analyze complex 3D images 2
... learning to swim? Thrashing around, floundering, until suddenly it ... of doggy-paddle propel you away from your parent's arms. ... swimmers. Actually, fish larvae are pretty feeble when it ... Dr Ulrike Müller from Wageningen University studies how fish ...
... breast cancer is the lack of inexpensive, early detection ... Michigan hope to change that by developing a device ... with breast cancer. The team won a Breast Cancer ... reward research proposals that could lead to critical advancements ...
... show that regular use of popular prescription pain relievers may ... percent and may offer similar benefit in the prevention of ... were released today at the annual meeting of the American ... believe this is the first study to show that selective ...
Cached Biology News:Even fish don't swim well when they're young! 2Researchers win money to develop breath test to detect breast cancer 2COX-2 inhibitors significantly reduce risk of cancer 2
(Date:7/11/2014)... -- , Not for release, publication or distribution ... jurisdiction where to do so would constitute a violation of ... ("Shire" or the "Company") (LSE: SHP, NASDAQ: SHPG ... has held a meeting with representatives of AbbVie. ... agreement or approval of AbbVie. A further update ...
(Date:7/11/2014)... 11, 2014 /CNW/ - Sunovion Pharmaceuticals Canada Inc. (Sunovion) ... (eslicarbazepine acetate) for use as a once-daily adjunctive therapy ... epilepsy who are not satisfactorily controlled with conventional therapy. ... patients under 18 years of age. ... and according to Epilepsy Canada, it affects 0.6% of ...
(Date:7/10/2014)... Product and process impurities in ... and are often “lost in the noise,” making ... presenters Dr. Rowel Tobias, Senior Scientist, Protein Chemistry ... of Quality at Nanotherapeutics, Inc., to lear about ... detection and quantitation while achieving the required specificity ...
(Date:7/10/2014)... Unraveling life’s mysteries can intrigue, amaze, and ... purchased a DNA test to unravel the ... a lifetime of memories, sharing, and closeness. In fact, ... genuinely brought the family closer together. , Recently, ... history and prior to taking the genetic ancestry ...
Breaking Biology Technology:Shire plc - Statement re: Media Speculation 2Sunovion Pharmaceuticals Canada Inc. Announces Health Canada Approval of APTIOM(TM) (eslicarbazepine acetate) as a Once-Daily Adjunctive Treatment for Partial-Onset Seizures in Patients with Epilepsy 2Sunovion Pharmaceuticals Canada Inc. Announces Health Canada Approval of APTIOM(TM) (eslicarbazepine acetate) as a Once-Daily Adjunctive Treatment for Partial-Onset Seizures in Patients with Epilepsy 3Sunovion Pharmaceuticals Canada Inc. Announces Health Canada Approval of APTIOM(TM) (eslicarbazepine acetate) as a Once-Daily Adjunctive Treatment for Partial-Onset Seizures in Patients with Epilepsy 4Novel Ms Techniques Speed Detection of Biopharmaceutical Product and Process Impurities, New Webinar Hosted by Xtalks 2Ancestry DNA Test Reveals a Controversial and Undiscovered Family History 2Ancestry DNA Test Reveals a Controversial and Undiscovered Family History 3Ancestry DNA Test Reveals a Controversial and Undiscovered Family History 4Ancestry DNA Test Reveals a Controversial and Undiscovered Family History 5
... Inc. (Nasdaq: EVVV ),a global endovascular device ... its Board of Directors effective immediately. , ... president and chief executive officer of CCS,Medical, a privately ... diseases such as diabetes, wound care, urology and respiratory,disorders. ...
... and PHILADELPHIA, Dec. 3 GlaxoSmithKline,(LSE/NYSE: GSK ) ... a,pending lawsuit in the previously announced tender offer to purchase ... Inc.,(Nasdaq: GNLB ), for $1.30 per share in ... It is a condition to ...
... Dec. 3 CeloNova BioSciences, Inc., announced,today that ... is commercializing the,CATANIA(TM) Coronary Stent System with NanoThin ... any stent thrombosis in clinical studies. It is ... now some Middle,Eastern countries with aggressive world-wide expansion ...
Cached Biology Technology:ev3 Inc. Appoints John L. Miclot to Board of Directors 2GlaxoSmithKline Announces Waiver of a Condition to the Tender Offer for Genelabs Technologies, Inc. 2GlaxoSmithKline Announces Waiver of a Condition to the Tender Offer for Genelabs Technologies, Inc. 3CeloNova BioSciences Commercializes CATANIA(TM) Coronary Stent With NanoThin Polyzene(R)-F in Europe and Middle East 2CeloNova BioSciences Commercializes CATANIA(TM) Coronary Stent With NanoThin Polyzene(R)-F in Europe and Middle East 3
prototype Nco I...
... is aseptically collected via cardiac puncture from 3 ... mixed sex). It is then centrifuged and frozen ... filtered and bottled at 4C then stored at ... HAVE ALWAYS USED PEL-FREEZ COMPLEMENT, YOU CAN NOW ...
These disposable button tethers are designed for rat infusion studies lasting more than 2 weeks. After one to two weeks the subcutaneous tissue will grow into the Dacron mesh, making the sutures irre...
Performance, mycoplasma, virus, and endotoxin tested...
Biology Products: