Navigation Links
Evolutionary forces explain why women live longer than men

Despite research efforts to find modern factors that would explain the different life expectancies of men and women, the gap is actually ancient and universal, according to University of Michigan researchers.

"Women live longer in almost every country, and the sex difference in lifespan has been recognized since at least the mid-18th century," said Daniel J. Kruger, a research scientist in the U-M School of Public Health and the Institute for Social Research. "It isn't a recent trend; it originates from our deep evolutionary history."

This skewed mortality isn't even unique to our species; the men come up short in common chimps and many other species, Kruger added.

Kruger and co-author Randolph Nesse, a professor of psychology and psychiatry and director of the Evolution and Human Adaptation Program, argue that the difference in life expectancy stems from the biological imperative of attracting mates.

"This whole pattern is a result of sexual selection and the roles that males and females play in reproduction," Kruger said, "Females generally invest more in offspring than males and are more limited in offspring quantity, thus males typically compete with each other to attract and retain female partners."

For example, in common chimps, the greatest difference in mortality rates for males and females occurs at about 13 years of age, when the males are just entering the breeding scene and competing aggressively for social status and females.

From the tail of the peacock to the blinged-out SUV, males compete aggressively for female attention, and that costs them something. In nature, it means riskier physiology and behavior for the males, such as putting more resources into flashy plumage or engaging in physical sparring.

And even in modern life, where most dueling is a form of entertainment, male behavior and physiology is shortening their lifespans relative to women, Kruger said. In fact, modern lifestyles ar
'"/>

Source:University of Michigan


Page: 1 2

Related biology news :

1. Evolutionary conservation of a mechanism of longevity from worms to mammals
2. Evolutionary biology research techniques predict cancer
3. Evolutionary shifts in olfactory sensitivities in fruit flies
4. Evolutionary scrap-heap challenge: Antifreeze fish make sense out of junk DNA
5. Salk and Stanford teams join forces to reveal two paths of neurodegeneration
6. New genetic analysis forces re-draw of insect family tree
7. Sleep enforces the temporal sequence in memory
8. Gene variations explain drug dose required to control seizures
9. Jumping gene helps explain immune systems abilities
10. Gene sequencing explains bioremediation bug
11. Variation in womens X chromosomes may explain differences among individuals, between sexes
Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Evolutionary forces explain why women live longer than men

(Date:7/30/2014)... that David L. Kaplan, Ph.D., will head the brand-new, ... as editor-in-chief. With the first issue slated for publication ... research in the rapidly burgeoning field of biomaterials, the ... with living or biological systems. , "This new journal ... the field of biomaterials over the past decade and ...
(Date:7/30/2014)... Sciences Institute (SALSI), a joint venture between The University ... of Texas Health Science Center at San Antonio, has ... The winners, Emily Boice from UTSA and Lei Huang ... their project titled, "Novel engineered ferritins for tracking and ... and Huang,s research is focused on finding a treatment ...
(Date:7/30/2014)... could be as simple as inserting a medicated, disappearing ... Washington bioengineers have discovered a potentially faster way to ... HIV. Their method spins the drug into silk-like fibers ... higher doses of the drug than possible with other ... could offer women a potentially more effective, discreet way ...
Breaking Biology News(10 mins):ACS Biomaterials Science & Engineering: Brand-new journal launches in 2015, names editor 2Dissolvable fabric loaded with medicine might offer faster protection against HIV 2Dissolvable fabric loaded with medicine might offer faster protection against HIV 3
... of human growth hormone (GH) by healthy elderly people found ... body composition but not in body weight or other clinically ... increased rates of unhealthy side effects such as soft tissue ... breast development. They were also somewhat more likely to ...
... to produce useful proteins could be an inexpensive ... the Flanders Interuniversity Institute for Biotechnology (VIB) at ... seeds proteins that have a very strong resemblance ... antibody variants are just as active as the ...
... of Warwick reveals that a Nobel Prize brings more than ... two years to your life. , The research by Professor ... Matthew Rablen, (a former Warwick postgraduate researcher now a government ... and Immortality". , The researchers carried out their study ...
Cached Biology News:Growth hormone is not the anti-aging bullet for healthy adults 2Growth hormone is not the anti-aging bullet for healthy adults 3Producing medicines in plant seeds 2Producing medicines in plant seeds 3New research says winning a Nobel Prize adds nearly 2 years to your lifespan 2
(Date:7/30/2014)... , July 30, 2014  Replikins Ltd. today released ... the Ebola virus. Before the current outbreaks, the mean ... 100 amino acids) between 1995 and 2002 was 1.1; ... in 2012, and sixteen-fold in 2013, thus predicting the ... this technology has been shown to be able to ...
(Date:7/30/2014)... Selexis SA , a serial innovation ... mammalian cell line development, announced today new data from ... presented at the 10th Annual Cell Line Development ... 10, 2014 at the Double Tree by Hilton Berkeley ... will be presented during an oral presentation: , Title: ...
(Date:7/30/2014)... Calif. , July 30, 2014   ... on the Fully Integrated Lifecycle Mission Support Services ... Space Administration (NASA). Under the terms of the ... Research Center at Moffett Field, Calif. In particular, ... for bioscience flight development projects on the International ...
(Date:7/30/2014)... (PRWEB) July 30, 2014 July 30, ... @APDN), a biotechnology firm that provides DNA-based authentication and ... Hogan, Ph.D. Vice President of Life Sciences, a newly ... , Dr. Hogan will lead APDN’s drive to ... relationships with biotech and healthcare customers, provide guidance to ...
Breaking Biology Technology:Selexis SA to Present New Data and a Case Study at IBC’s Cell Line Development and Engineering Conference 2Selexis SA to Present New Data and a Case Study at IBC’s Cell Line Development and Engineering Conference 3Wyle Wins NASA's Fully Integrated Lifecycle Mission Support Services Contract 2Dr. Michael E. Hogan, Ph.D., Joins Applied DNA Sciences as Vice President, Life Sciences 2Dr. Michael E. Hogan, Ph.D., Joins Applied DNA Sciences as Vice President, Life Sciences 3
... American Stock Exchange(R),(Amex(R)) today listed the common ... symbol RNN., Rexahn Pharmaceuticals is a ... discover, develop and commercialize,innovative treatments for cancer, ... unmet medical needs. Rexahn,s compounds are designed,to ...
... Judges for Nikon Small World, MELVILLE, N.Y., ... received a record number of entries for the ... by over 300,images. The oldest and most respected ... world,s best photomicrographers who create beautiful,imagery while showing ...
... Informed Medical Communications,(IMC), a leading provider of peer-to-peer ... appointment of Bert,Marchio to the position of Executive ... ), Marchio brings to IMC over 20 ... both the public and private sectors, with the ...
Cached Biology Technology:American Stock Exchange Lists the Common Stock of Rexahn Pharmaceuticals, Inc. 2Nikon Instruments Receives Record Number of Entries for Nikon Small World 2Informed Medical Communications Appoints New Chief Financial Officer 2
... or Isolated Sequence) siRNA Test System is ... evaluation of a potential of any DNA ... for RNA interference (RNAi). Current computer-based RNAi ... the probability of selected sequence to be ...
Glycerol-based mounting medium for immunofluorescence microscopy. Formulated to retard photobleaching of fluorochromes such as fluorescein and rhodamine. Product can also be used as a diluent for fl...
Anti-Phospho-JKK/SEK1/MKK4 pAb Description: 100 g rabbit polyclonal antibody. Reacts with human/mouse/rat. Tested in WB. Research Focus: signal transduction Storage: -20C Shipping Tem...
... formulated for covering tissue sections and cell preparations immunohistochemically stained ... , ... Application: Vision Mount ... that require an aqueous mounting medium, or those that do ...
Biology Products: