Navigation Links
Duda, where'd my spines go?
Date:1/7/2010

UC researcher finds that when it comes to hooking up with the opposite sex, genital complexities do matter.

Charles Darwin spent eight years studying barnacles and their genitalia. In much less time than that, University of Cincinnati evolutionary biologist Michal Polak (and co-author Arash Rashed now at the University of California, Berkeley) have confirmed one of Darwin's theories: that genitalia complexities in some male species have developed because they assist the male in "holding her securely."

As just published online in the Proceedings of the Royal Society B, "Microscale Laser Surgery Reveals Adaptive Function of Male Intromittent Genitalia" Polak's research showed that without a doubt among the fruit fly species Drosophila bipectinata Duda, the males' penile peculiarities assisted them in copulation.

Polak, an associate professor in the Department of Biological Sciences in McMicken College of Arts and Sciences at UC, used a laser ablation technique to cut off tiny "intromittent" spines on the genitalia of virgin male D. bipectinata Duda fruit flies.

"We refer to these genital spines as intromittent because they insert [them] into female external genitalia during copulation, and not because they insert into the reproductive tract," Polak and Rashed explain in their paper.

Polak's study concluded that the male genital spines serve two functions. When the spines were removed, the males experienced drastic reductions in ability to copulate and ability to compete against rival males for mates. However, if the males were able to copulate, they found that insemination and fertilization rates were not significantly different.

They're not done yet, says Polak.

"We are using the laser for a variety of projects, including to surgically excise other genital traits and the tiny but elaborate male sex 'combs' used in courtship, and to study their adaptive function in sexual selection."


'/>"/>

Contact: Wendy Beckman
wendy.beckman@uc.edu
513-556-1826
University of Cincinnati
Source:Eurekalert  

Related medicine news :

1. The Future of Spine Care Has Just Gotten Better With the Use of SpineSix BioMotion Spinal System(TM)
2. Tissue Genesis Signs Exclusive Distribution and License Agreement with SpineSmith
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Duda, where'd my spines go?
(Date:6/25/2016)... ... June 25, 2016 , ... First Choice Emergency Room ... Dr. Sesan Ogunleye, as the Medical Director of its new Mesquite-Samuell Farm facility. ... of our new Mesquite location,” said Dr. James M. Muzzarelli, Executive Medical Director of ...
(Date:6/25/2016)... ... ... Conventional wisdom preaches the benefits of moderation, whether it’s a matter of ... too high can result in disappointment, perhaps even self-loathing. However, those who set the ... Research from PsychTests.com reveals that behind the tendency to set low expectations ...
(Date:6/24/2016)... PASADENA, CA (PRWEB) , ... June 24, 2016 , ... Marcy was in a crisis. ... he would lash out at his family verbally and physically. , “When something upset him, ... table, he would use it. He would throw rocks at my other children and say ...
(Date:6/24/2016)... ... 24, 2016 , ... Comfort Keepers® of San Diego, CA is excited to ... Recovery® program to drive cancer patients to and from their cancer treatments. Comfort ... quality of life and ongoing independence. Getting to and from medical treatments is ...
(Date:6/24/2016)... ... June 24, 2016 , ... The Haute Beauty Network, affiliated ... Weintraub as a prominent plastic surgeon and the network’s newest partner. , ... most handsome men, look naturally attractive. Plastic surgery should be invisible.” He stands ...
Breaking Medicine News(10 mins):
(Date:6/23/2016)... a startling report released today, National Safety Council research ... proven plan to eliminate prescription opioid overdoses. Prescription Nation ... tackling the worst drug crisis in recorded U.S. history, assigned a ... , New Mexico , Tennessee ... failing states, three – Michigan , ...
(Date:6/23/2016)... , June 23, 2016 ... CAPR ), a biotechnology company focused on ... today announced that patient enrollment in its ongoing ... Duchenne) has exceeded 50% of its 24-patient target. ... in the third quarter of 2016, and to ...
(Date:6/23/2016)... , June 23, 2016 , ... on Thursday, July 7, 2016 , , , , LOCATION: ... , , , , EXPERT PANELISTS:  , , , ... Senior Industry Analyst, Christi Bird; Senior Industry Analyst, Divyaa Ravishankar and ... The global pharmaceutical industry is witnessing an exceptional era. ...
Breaking Medicine Technology: