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:5/26/2016)... ... 26, 2016 , ... On Memorial Day, Hope For Heroes and ... military battle for the country. The nonprofit Hope For Heroes partnered with the ... empower independence for disabled military veterans, as well as police, firemen, and EMS professionals ...
(Date:5/26/2016)... ... 26, 2016 , ... There are nearly 14.5 million people living with and ... On Sunday, June 5, 2016, communities around the world will gather to recognize these ... National Cancer Survivors Day® is an annual worldwide Celebration of Life that is held ...
(Date:5/26/2016)... ... May 26, 2016 , ... Dr. James Maisel will ... Long Island Chapter on June 4, 2016, 1:30-3:30 pm at the Farmingdale Public ... Retina Group of New York , is a Board Certified ophthalmologist who ...
(Date:5/26/2016)... R.I. (PRWEB) , ... May 26, 2016 , ... Memorial ... That’s why Amica Insurance is sharing tips to make sure your family ... estimate from the National Safety Council, there may be 439 deaths and an additional ...
(Date:5/26/2016)... ... May 26, 2016 , ... The Lung Institute has partnered ... cessation class starting June 6 at their clinic in downtown Tampa. The class is ... the Lung Institute has created a free downloadable 4 Week Smoking Cessation Guide ...
Breaking Medicine News(10 mins):
(Date:5/25/2016)... , May 25, 2016  Zymo Research Corp. ... their new reference materials that help researchers obtain ... collection to analyses. The rapid growth of the ... researchers to have standard methods to improve the ... Biases inherently exist at every step of the ...
(Date:5/25/2016)... According to market research "Global ... Demand Forecast to 2022 - Industry Insights by Type ... by P&S Market Research, the global insulin delivery device ... it is expected to grow at a CAGR of ... segment is expected to witness the fastest growth at ...
(Date:5/25/2016)... , May 25, 2016  Granger Diagnostics today ... test for wounds and infections. This test ensures ... and select viruses. The test requires only a ... David G. Bostwick , MD, ... to facilitate wound healing: "We are excited to ...
Breaking Medicine Technology: