The great diversity of male sexual traits, ranging from peacock's elaborate train to formidable genitalia of male seed beetles, is the result of female choice, say researchers from Uppsala University, but why do females choose among males? In a new Current Biology study they found no support for the theory that the female choice is connected to "good genes".
There is no consensus among biologists over the key question why females choose among males but the heart of this debate has two preferred possibilities - that female choosiness is beneficial to the females themselves or that female choice traits are favored because of 'good genes' that males contribute to female's offspring.
Across the animal kingdom, females often resist male advances and only a small fraction of mating attempts result in copulations. Mating is costly, and one straightforward explanation for female resistance is that non-resistant females will suffer a reduction in their fitness.
However, by resisting mating attempts, females are selecting for most 'persistent' males so could it be that offspring of such 'persistent' males have higher fitness? If yes, female resistance can be viewed as a way of selecting for males that provide their offspring with 'good genes'.
"We manipulated female choosiness by altering female ability to reject unwanted males in Adzuki beetle. Female beetles are constantly harassed by ardent males and thwart male mating attempts by vigorously kicking the unwanted suitors with their hind legs. We fitted females with prongs that reduced male ability to impose copulations. Alternatively, we reduced females' ability to resist copulations by shortening their hind legs. Females with increased ability to reject male mating attempts had much higher fitness than females whose resistance was reduced. What about the 'good genes'?" says Alexei Maklakov, who led the study.
"We found no support for the idea that increased female resistance to mating results in sons that are more successful in competition with other males, or in more fertile daughters. Hence, female resistance is mostly beneficial to the female herself, while inadvertent selection for male 'persistence' plays a minor role."
- PHYSICAL SCIENCES
- EARTH SCIENCES
- LIFE SCIENCES
- SOCIAL SCIENCES
Subscribe to the newsletter
Stay in touch with the scientific world!
Know Science And Want To Write?
- Kudos To "The Independent" Newspaper For Debunking Nibiru "Blood Moon" Hoax
- Alzheimer's: Nicotinic Receptors As A New Therapeutic Target
- Your Microbiome Did Not Cause Your Weight Problem
- Dogs Understand Both Vocabulary And Intonation Of Human Speech
- State Of Academic Freedom 2016
- Free Market Validation: Men With Hair Transplants Are Seen As Younger, More Attractive
- USDA Microbiologist Warns Bacteria In Vaping Products May Be A Health Concern
- "Hi Margaret, thanks, glad you like my replay, and any views are welcome here :). It's only trolling..."
- "Not sure why some readers think that I somehow got red pilled recently. I have told my (then still)..."
- "Sounds like a sun dog to me. I'm not exactly that knowledgeable about this sort of thing, but going..."
- "You have a point. Let me find out how this got misconstrued...."
- "So what's your excuse? Try googling the actual study abstract, it's called 'Bacterial Populations..."
- <a href="/news/2016/08/29/icymi-acshs-most-popular-articles-summer-9931">ICYMI: ACSH's Most Popular Articles of the Summer <i class="fa fa-angle-double-right"></i></a>
- How Herpes Drugs Work
- The Infrared Sauna: Hollywood's Hot, Pricey 'Magic' Box
- E-Cigarette Flavors, Biotech Courts And More Media Links
- <a href="/news/2016/08/29/pediatricians-crack-down-anti-vaxx-parents-policy-report-says-9930">Pediatricians To Crack Down On Anti-Vaxx Parents, Policy Report Says <i class="fa fa-angle-double-right"></i></a>
- <a href="/news/2016/08/29/high-drug-costs-blame-playa-or-play-9873">High Drug Costs - Blame The Playa Or The Play? <i class="fa fa-angle-double-right"></i></a>
- New research finds female mosquitoes can transmit Zika virus to their eggs and offspring
- Sacubitril-valsartan cost-effective for treating reduced ejection fraction heart failure
- Folic acid fortified food linked to decline in congenital heart defects
- Plants' future water use affects long-term drought estimates
- Radiologists detect breast cancer in 'blink of an eye'