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:10/13/2017)... (PRWEB) , ... October 13, ... ... School of Pharmacy (SOP) alumni Hannah Randall, PharmD ‘17, and Jennifer Huggins, ... professionals on guideline updates for the primary prevention of cardiovascular diseases during ...
(Date:10/13/2017)... ... October 13, 2017 , ... Ellevate Network, the leading network for professional ... action towards gender equality at their inaugural Summit in New York City in June. ... a social audience of over 3 million. To watch the Mobilize Women video, ...
(Date:10/13/2017)... ... October 13, 2017 , ... “The Journey: From the Mountains to ... to save lost souls in the Philippines. “The Journey: From the Mountains to the ... teacher of the Bible. She has taught all ages and currently teaches a class ...
(Date:10/12/2017)... ... October 12, 2017 , ... The ... demand of today’s consumer and regulatory authorities worldwide. From Children’s to Adults 50+, ... to meet the highest standard. , These products are also: Gluten Free, ...
(Date:10/12/2017)... ... October 12, 2017 , ... Dr. Parsa Mohebi, ... a medical article to the newly revamped Cosmetic Town journal section, ... hair transplant procedure known as Follicular Unit Extraction (FUE). , Dr. ...
Breaking Medicine News(10 mins):
(Date:9/19/2017)... medical device company developing a non-invasive, robotically assisted, platform therapy that uses pulsed sound energy ... ... Jim Bertolina, PhD ... Tom Tefft ... executive Josh Stopek , PhD, who has led R&D and business development teams at ...
(Date:9/18/2017)... , Sept. 18, 2017  PMD Healthcare of ... Pharmacy of Kalamazoo, Mich. , have ... service that expedites and streamlines patient and provider access ... 2.0, and wellness management services.  ... used to measure lung function for a variety of ...
(Date:9/13/2017)... , Sept. 13, 2017   OrthoAtlanta has been ... Atlanta Football Host Committee (AFHC) for the 2018 College Football ... 8, 2018, at Mercedes-Benz Stadium in Atlanta, Georgia ... the AFHC "I,m In" campaign, participating in many activities leading ... ...
Breaking Medicine Technology: