About My Health Careers Internship MedBlogs Contact us
Medindia LOGIN REGISTER
Advertisement

Absolutely Shocking : More Partners, More Short Lived the Male is Likely to Be!

by Medindia Content Team on October 18, 2007 at 2:34 PM
Font : A-A+

Absolutely Shocking : More Partners, More Short Lived the Male is Likely to Be!

The more partners a male has, the more is the chance that he will die at an early age, says a Cambridge University study. The study led by Tim Clutton -Brock and Kavita Isvaran at the University found that males age faster and die younger than females and suggested that this trait could be linked to humankind's ancestral breeding habits.

In the study the researchers analysed data, which measured survival, and descriptions of breeding for both sexes in animals. Several explanations have been proposed for the lifespan difference between the sexes - it could be a result of the ageing effects of testosterone, or it could be evolutionary forces- having the men die early might ease pressure on valuable resources, for example, helping the overall success of the species. Or it could be something to do with mating behaviour.

Advertisement

Earlier observations had suggested that polygyny was a common characteristic among species in which males die younger than females, including red deer, lions and elephant seals. It was observed that elephant seals can have harems as large as 40 females but the males lived only 75 percent as long as the females.

The analysis of the study found that no consistent sex differences in breeding life spans, annual rates of mortality or rates of ageing in monogamous species. However, the team reported that the more polygynous a species was, the more short-lived the male was likely to be, and the shorter their duration of effective breeding.
Advertisement

"Fight hard, and not only die young but evolve to die young," Nature quoted Stephen Stearns of Yale University in New Haven, Connecticut, as saying. For example in polygynous red deer, males live 75 percent as long as females, and have an effective breeding period of less than half that of the females.

In swans, which almost always pair for life with only a 6 percent divorce rate, life spans and effective breeding periods were nearly equal.

Researchers said that the trait could be because in species in which males fight for mates, evolution favours the development of characteristics that help win fights, such as aggression or antler growth, at the expense of male longevity. "We need more long-term studies following individual animals through their lifespan to understand this better," Clutton-Brock said.

"The results can be simplified as fight hard, and not only die young but evolve to die young," Stearns said.

Source: ANI
LIN/V
Advertisement

Advertisement
News A-Z
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Advertisement
News Category
What's New on Medindia
International Day of Persons with Disabilities 2021 - Fighting for Rights in the Post-COVID Era
Effect of Blood Group Type on COVID-19 Risk and Severity
Woman with Rare Spinal Cord Defect from Birth Sues Doctor
View all

Medindia Newsletters Subscribe to our Free Newsletters!
Terms & Conditions and Privacy Policy.


Recommended Reading
Life Span (or) Death Clock
Calculate how many more seconds have you got to live. An interesting reminder for us to live these ....
Older Dads Contribute to Human Longevity
Men who fall for women half their age are actually doing humans a service, as it ensures the human ....

Disclaimer - All information and content on this site are for information and educational purposes only. The information should not be used for either diagnosis or treatment or both for any health related problem or disease. Always seek the advice of a qualified physician for medical diagnosis and treatment. Full Disclaimer

© All Rights Reserved 1997 - 2021

This site uses cookies to deliver our services. By using our site, you acknowledge that you have read and understand our Cookie Policy, Privacy Policy, and our Terms of Use