A North Dakota State University study suggests males with higher levels of testosterone sire more children, but have shorter life spans
United Press International:
Wendy Reed and colleagues followed a group of dark-eyed juncos, small mountain songbirds found across North America, through seven breeding seasons. The scientists injected males with elevated levels of testosterone and found they had shorter lives, but sired more offspring -- even with females who were mated with other males.
"The surprising result was that testosterone-treated males had a higher overall fitness than control males," write the authors in the May issue of American Naturalist.
"Although testosterone increased male fitness, as measured by lifespan and number of offspring, the extended effects on offspring and female mates were generally negative and may ultimately constrain the evolution of higher testosterone levels in males," said the authors.
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1 Comments:
Hi,
Healthline just designed a virtual guide explaining how testosterone affects the body. You can see the infographic here: http://www.healthline.com/health/low-testosterone/effects-on-body
This is valuable med-reviewed information that can help a man understand how affects multiple parts of their bodies and the side effects that occur from having low testosterone. I thought this would be of interest to your audience, and I’m writing to see if you would include this as a resource on your page: http://moderntribalist.blogspot.com/2006/04/north-dakota-state-university-study.html
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