Navigation Links
Duda, where'd my spines go?

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
University of Cincinnati

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:
Related Image:
Duda, where'd my spines go?
(Date:10/13/2015)... (PRWEB) , ... October 13, 2015 , ... ... workflow solutions, announced today their sponsorship of the Microsoft Dynamics AXUG, GPUG and ... AXUG Summit, GPUG Summit and NAVUG Summit are independent user conferences designed and ...
(Date:10/13/2015)... ... October 13, 2015 , ... In an age where ... were 36 percent lower per square foot than in 2009. The Williamsport Regional Medical ... heating and cooling has decreased by eight percent. , According to Facilities Management ...
(Date:10/13/2015)... ... October 13, 2015 , ... e-con Systems Inc., a leading embedded ... See3CAM_CU40, the industry’s first RGB-IR pixel format camera with a USB 3.0 interface ... e-con’s See3CAM family of UVC USB 3.0 cameras, is based on the 1/3-inch OV4682 ...
(Date:10/13/2015)... Los Angeles, CA (PRWEB) , ... October 13, ... ... has published an in-depth review of Anik Singal's newly launched "Publish Academy" ... scaling a digital publishing business opened for enrollment today, and marketers around the ...
(Date:10/13/2015)... , ... October 13, 2015 ... ... Omega-3, a first-of-its kind product that targets the unique health needs of ... of the American Pregnancy Association ( ), utilizes Nordic Naturals’ exclusive, ...
Breaking Medicine News(10 mins):
(Date:10/13/2015)... , Oct. 13, 2015  Yesterday Congresswoman ... Vaccines Holly Springs manufacturing site located in ... the facility has produced Flucelvax ® (Influenza Vaccine) using ... potential for faster start-up and is not reliant on ... Limited acquired the influenza vaccines business of Novartis AG ...
(Date:10/12/2015)... 13, 2015 the United States ... a non-clinical capacity. --> the United States ... a non-clinical capacity. --> The University of Texas MD ... the first high field (1.5 Tesla) MRI-guided linear accelerator in ... system will be operating in a non-clinical capacity. Royal ...
(Date:10/12/2015)... , Oct. 12, 2015  Former White House Spokesman, and ... for the House Narcotics Committee, Robert Weiner , and ... Policy." The two emphasize that this is now a potential ... to Jeb Bush , Carly Fiorina to ... the newest federal statistics, which they call "a shocker: 23 ...
Breaking Medicine Technology: