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 s
'/>"/>

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

Page: 1 2

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:7/31/2014)... 31, 2014 According to a report by ... underwent partial knee replacement surgery on his left knee. This ... months earlier. The story also reports that Bush was able ... to be back on the bike again soon. This high ... of partial knee replacement. , “Partial knee replacements give ...
(Date:7/31/2014)... 31, 2014 Recognizing that today’s medical ... Nutrition Healthcare Conference announced today its student discount ... of medicine or a healthcare-related field, as well as ... student-only discounts for the conference, scheduled for September 17-20, ... Bay Resort. , “As a future Registered ...
(Date:7/31/2014)... 31, 2014 ProtonPACS, a division of ... the National Rural Health Association (NRHA), company officials announced ... understanding the needs of rural health providers nationwide. , ... Health Association,” said Dr. Mark Awh, President of Radsource. ... of ProtonPACS, we are also looking forward to learning ...
(Date:7/31/2014)... The shale gas development that has vaulted ... U.S. natural gas production has raised concerns that local ... similar to previous resource extraction experiences in Pennsylvania’s history. ... & Jefferson College’s (W&J) Center for Energy Policy & ... that the gas boom in Pennsylvania is still underway, ...
(Date:7/31/2014)... Los Angeles, CA (August 1, 2014) While it is ... more likely to use alcohol, a new study finds ... likely to drink than their civilian counterparts. This study ... , a SAGE journal published on behalf of the ... Teachman, Carter Anderson, and Lucky Tedrow studied surveys of ...
Breaking Medicine News(10 mins):Health News:George W. Bush’s Surgery Highlights the Benefits of Partial Knee Replacement 2Health News:Student Discounts Offered for International Plant-based Nutrition Healthcare Conference 2Health News:Student Discounts Offered for International Plant-based Nutrition Healthcare Conference 3Health News:ProtonPACS Announces Pipeline Partnership with the National Rural Health Association. 2Health News:Pennsylvania’s Shale Gas: Examining the Boom and Bust Cycle 2Health News:Pennsylvania’s Shale Gas: Examining the Boom and Bust Cycle 3Health News:Women in military less likely to drink than civilian women 2
... James "Buster" Douglas, former World Heavyweight Boxing Champion, ... brand new inspirational diabetic diet cookbook. "Take a ... Bar-B-Q Knockout Diabetes Diet," available now on Amazon.com ... to order for Mother,s Day, Sunday, May 10, ...
... Partners, Inc. and its affiliate, JLL Patheon Holdings, LLC (collectively, ... on May 7, 2009 (the "Expiry Time") 31,411,927 Restricted Voting ... deposited to JLL,s offer to acquire, at a price of ... and outstanding Restricted Voting Shares of Patheon (the "Offer"). As ...
... Universal Capital Management, Inc. (OTC Bulletin Board: UCMT), ... management and strategic growth resources to emerging growth ... ("Vystar") and Alatech Healthcare, LLC announced 510(k) clearance ... to market and sell Alatech,s Envy(TM) condom manufactured ...
... less cardiovascular disease than those who smoke, according ... and women in Norway. Smoking, say the investigators, ... from various causes. , The results, presented in ... studies have indicated, but, says investigator Professor Haakon ...
... preventive measures identified by the European Heart Health ... of EuroPRevent 2009, the congress of the European ... takes place in Stockholm, Sweden, on 6-9 May. ... is shown to improve markers of heart disease ...
... Netherlands: New research that uses an innovative approach to study, ... exercise habits to the development of the obesity epidemic has ... since the 1970s was virtually all due to increased energy ... has been caused by excess calorie intake and how much ...
Cached Medicine News:Health News:President Obama's New Knockout Mother's Day Message from Champ 2Health News:JLL Announces Extension of Its Offer To Acquire Patheon and Take Up of Deposited Restricted Voting Shares 2Health News:JLL Announces Extension of Its Offer To Acquire Patheon and Take Up of Deposited Restricted Voting Shares 3Health News:Universal Capital Management Reports Vystar(TM) Corporation Receives FDA Clearance for Envy(TM) Natural Rubber Latex Condom Made with Vytex(TM) NRL 2Health News:Universal Capital Management Reports Vystar(TM) Corporation Receives FDA Clearance for Envy(TM) Natural Rubber Latex Condom Made with Vytex(TM) NRL 3Health News:Universal Capital Management Reports Vystar(TM) Corporation Receives FDA Clearance for Envy(TM) Natural Rubber Latex Condom Made with Vytex(TM) NRL 4Health News:30-year follow-up study: 'Tremendous' impact of smoking on mortality and cardiovascular disease 2Health News:More evidence for the benefit of exercise in cardiovascular disease -- and even in heart failure 2Health News:More evidence for the benefit of exercise in cardiovascular disease -- and even in heart failure 3Health News:Increased food intake alone explains the increase in body weight in the United States 2Health News:Increased food intake alone explains the increase in body weight in the United States 3
(Date:7/30/2014)... 2014  Today the US Surgeon General issued the most ... or sun burns stating they can lead directly to deadly ... Lushniak , says that "skin cancer is a major public ... exposure to indoor and outdoor ultraviolet light is a major ... in Boca Raton, Florida , Marta ...
(Date:7/30/2014)... July 30, 2014 Research and Markets ... and Chinese Aseptic Packaging Industry Report 2014" report ... The Global and Chinese Aseptic Packaging ... the current state of the global Aseptic Packaging industry ... report provides a basic overview of the industry including ...
(Date:7/30/2014)... , July 30, 2014  InnoPharma, Inc. today announced ... (the generic equivalent of Zyprexa® injection), in Canada.  Olanzapine ... disturbed behaviors in patients with schizophrenia or bipolar I ... injectable drug, InnoPharma has entered into an agreement with ... will make, use, sell, market and distribute Olanzapine ...
Breaking Medicine Technology:Indoor and Outdoor Sun Tanning or Sun Burns Directly Linked to Deadly Melanoma Skin Cancer 2Global and Chinese Aseptic Packaging Industry Report 2014 2InnoPharma Announces Launch of Olanzapine for Injection, 10mg/vial in Canada 2
... Roy Cooper warned the House Special Select Committee on ... pharmaceutical companies could cost North Carolina taxpayers what one ... Still, the GOP-controlled committee, led by Rep. Johnathan ... to the House floor for a vote next week. ...
... In an effort to match last year,s $250,000 Pepsi Refresh ... "Repeat the Wave" Campaign on April 1 raising over $40,000 ... days. Until April 30, KCRF is increasing awareness and raising ... Treatment by asking the public to "like" them on Facebook. ...
Cached Medicine Technology:GOP's Big Pharma Protection to Cost NC Taxpayers "Hundreds of Millions" 2Kanzius Cancer Research Foundation Earns $1 for Each New Facebook Fan 2
Printed with large 20/200 E on one side and a series of five 20/20 tumbling Es on the other- calibrated to a 20 ft. distance. May be used to test and train peripheral awareness....
... 2/25 is an economically priced 2-channel ... and research use in the fields ... neurophysiology, biology, zoology, biochemistry and biomedical ... ADInstruments signal conditioners and transducers. Two ...
... The PowerLab/4SP is a high-performance data ... of research applications including human and animal ... biomedical engineering. The unit is capable of ... speeds (up to 200 000 samples per ...
... Worth 4 Dot with 955R Red/Green ... the presence of binocular vision. Consists ... illuminated discs: two green, one red ... at any distance. Patient wears red/green ...
Medicine Products: