Navigation Links
Battle of the sexes offers evolutionary insights
Date:5/3/2012

In a paper published May 3, in the journal Evolution, University of Cincinnati graduate student Karl Grieshop and Michal Polak, associate professor of biological sciences at UC, examine the role of genital spines in the reproductive success of a species of fruit fly. Their investigation identifies the specific type of advantage these spines bestow in the competition to reproduce.

"The leading hypothesis to explain the remarkable diversification of male genital traits is that such complexity evolves in response to sexual selection," Grieshop said. "Specifically, mechanisms of sexual selection operating during and after mating, such as sperm competition and cryptic female choice, have received the most support."

Grieshop and Polak have found compelling evidence that the spiny genitals of these male fruit flies provide the most benefit before the sexual act, rather than during mating or afterward. They achieved this understanding by using a precision laser surgery system to trim the claw-like spines of hundreds of male fruit flies and monitoring their success in a variety of mating situations.

Of the many species of fruit fly, they chose Drosophila ananassae because of the extraordinary length of these males' genital spines. Using the laser system, they removed the spines completely from some males, cut the spines in half on others, and merely blunted the spine tips on the final group.

Grieshop and Polak discovered that males with their spines completely removed were unable to copulate at all. Males with spines cut in half saw a profound reduction in sexual success. Those whose spines were merely blunted suffered a slight, non-significant reduction in copulation success, which was intensified to a statistically significant effect in sexually competitive environments. They likewise found the decrease in copulation success of partial-cut males was much stronger in competitive environments. And, it is in competitive e
'/>"/>

Contact: Greg Hand
greg.hand@uc.edu
513-556-1822
University of Cincinnati
Source:Eurekalert  

Page: 1 2

Related biology news :

1. Carp dominate crayfish in invasive species battleground
2. Bacteria battle against toxic fluoride
3. Savannas, forests in a battle of the biomes, Princeton researchers find
4. The remarkable history of medicines battle with infectious diseases
5. The battle of the morphogens: How to get ahead in the nervous system
6. Trudeau Institute announces new discovery in battle against infections
7. Battle won against Asian tiger mosquito
8. Trudeau Institute announces new discovery in battle against plague and bacterial pneumonias
9. Plant pathologist finding Kansas wheat fields a molecular battleground this season
10. Stevens biomedical engineering students fight hypothermia on the battlefield
11. Battle scars found on an ancient sea monster
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Battle of the sexes offers evolutionary insights
(Date:3/31/2015)... NEW YORK , March 31, 2015  Elephant ... the "Company"), a global provider of Software Defined Network ... solutions, today announced total revenue of approximately $20.4 million ... to a restated $19.5 million for the year ended ... of calendar 2014, the Company had completed its multi-year ...
(Date:3/30/2015)... 26, 2015 Research and Markets ( ... "Global Gesture Recognition Market in Automotive Sector 2014-2018" ... the Global Gesture Recognition market in Automotive Sector to ... 2013-2018. Gesture recognition is the ability of ... of an individual. Gesture recognition technology can be 2D-based ...
(Date:3/24/2015)... --Research and Markets ( http://www.researchandmarkets.com/research/hdgz7h/global_iris ) has ... Market 2015-2019" report to their offering. ... grow at a CAGR of 23.5 percent over the ... scenario and the growth prospects of the Global Iris ... market size, the report considers the revenue generated from ...
Breaking Biology News(10 mins):Elephant Talk Reports 2014 Fourth Quarter and Year End Financial Results 2Elephant Talk Reports 2014 Fourth Quarter and Year End Financial Results 3Elephant Talk Reports 2014 Fourth Quarter and Year End Financial Results 4Elephant Talk Reports 2014 Fourth Quarter and Year End Financial Results 5Elephant Talk Reports 2014 Fourth Quarter and Year End Financial Results 6Global Gesture Recognition Market in Automotive Sector Report 2015 - Growing Number of Partnerships 2Global Iris Recognition Market 2015-2019 with 3M Cogent, Bioenable Technologies, Cross Match Technology, Iris ID Systems & Safran Dominating 2
... a key source of water for millions of people in ... climate changes as expected and future water usage is not ... of Oceanography, UC San Diego. Without Lake ... no buffer to sustain the population of the Southwest through ...
... Feb. 11 Most fashion consumers consider,custom-made jeans ... lottery,winners. But Intellifit, a leader in proprietary apparel ... perception., This week, the company will begin ... company retail store outside of Philadelphia. Using Intellifit,technology, ...
... the Moores Cancer Center at University of California, San Diego ... were treated with a gene therapy protocol began making antibodies ... be published on line the week of February 11-15 in ... of Science. Researchers led by Thomas J. Kipps, M.D., ...
Cached Biology News:Lake Mead could be dry by 2021 2Lake Mead could be dry by 2021 3Intellifit(R) Offers Custom-Made Jeans with a High-Tech Twist 2Gene therapy protocol at UCSD activates immune system in patients with leukemia 2
(Date:5/4/2015)... FRANCISCO, Calif. , May 4, 2015 /PRNewswire/ ... biopharmaceutical company focused on the development and commercialization ... announced today the completion of its merger with ... In conjunction with the closing of the merger, ... a combination of new investors and all current ...
(Date:5/4/2015)... BOSTON , May 4, 2015 ... development of novel therapies for neurological and neuropsychiatric ... has initiated dosing of Alzheimer,s patients in a ... candidate, GC021109, a compound developed as a potential ... disease is innovative in that it both promotes ...
(Date:5/4/2015)... May 4, 2015 /PRNewswire/ - Fluorinov Pharma (Fluorinov), ... the appointment of Dr. Roger J Garceau, to ... biotech companies in matters including corporate development and ... and adds significant regulatory expertise as Fluorinov transitions ... brings 30 years of pharmaceutical development experience to ...
(Date:5/4/2015)... Genedata, a leading provider of advanced ... research, today announced the release of Genedata ... enterprise solution for biologics R&D. This first-in-class workflow ... and development of novel biotherapeutics. Version 5.0 enables ... optimization and developability requirements. Genedata will present highlights ...
Breaking Biology Technology:Tobira Therapeutics Completes Financing and Merger with Regado Biosciences 2Tobira Therapeutics Completes Financing and Merger with Regado Biosciences 3Tobira Therapeutics Completes Financing and Merger with Regado Biosciences 4Tobira Therapeutics Completes Financing and Merger with Regado Biosciences 5Tobira Therapeutics Completes Financing and Merger with Regado Biosciences 6GliaCure Initiates Phase 1b Dosing in Alzheimer's Patients 2Roger J Garceau joins Fluorinov board, adds clinical expertise to bromodomain program and oncology pipeline 2Roger J Garceau joins Fluorinov board, adds clinical expertise to bromodomain program and oncology pipeline 3Genedata Biologics 5.0 – Antibody Engineering and Developability Assessment Advances 2Genedata Biologics 5.0 – Antibody Engineering and Developability Assessment Advances 3Genedata Biologics 5.0 – Antibody Engineering and Developability Assessment Advances 4
... New Launches Should Contribute Significantly in Second Half, ... PRX ) today announced results for the,second quarter ended ... For the second quarter ended June 28, 2008, Par ... $20.1 million, or $0.60 per diluted,share. This is compared with ...
... ITMN ) today announced that Daniel G. Welch, ... Canaccord Adams 28th Annual,Global Growth Conference in Boston on ... access a live audio webcast of the presentation, investors ... relations page of InterMune,s,corporate website at http://www.intermune.com . ...
... YORK, Aug. 7 Microbes, Inc. today announced that ... all of its outstanding,Class B Common Stock Purchase Warrants, ... 2 until 12:00 midnight, New York City time, on,Friday, ... at 12:00,midnight, New York City time, on August 7, ...
Cached Biology Technology:Par Pharmaceutical Reports Second Quarter 2008 Results 2Par Pharmaceutical Reports Second Quarter 2008 Results 3Par Pharmaceutical Reports Second Quarter 2008 Results 4Par Pharmaceutical Reports Second Quarter 2008 Results 5Par Pharmaceutical Reports Second Quarter 2008 Results 6Par Pharmaceutical Reports Second Quarter 2008 Results 7Par Pharmaceutical Reports Second Quarter 2008 Results 8