Navigation Links
Female choice benefits mothers more than offspring
Date:10/22/2009

The great diversity of male sexual traits, ranging from peacock's elaborate train to formidable genitalia of male seed beetles, is the result of female choice. But why do females choose among males? In a new study published today in Current Biology, researchers from Uppsala University found no support for the theory that the female choice is connected to "good genes".

The great diversity of male sexual traits, ranging from peacock's elaborate train to formidable genitalia of male seed beetles, is the result of female choice. But why do females choose among males? Remarkably, there is no consensus among biologists over the key question why females choose among males. At the heart of this debate lie two distinct possibilities - that female choosiness is beneficial to the females themselves or that female choice traits are favoured because of 'good genes' that males contribute to female's offspring.

Across animal kingdom, females often resist male advances and only a small fraction of mating attempts result in copulations. Mating is costly, and one straightforward explanation for female resistance is that non-resistant females will suffer a reduction in their fitness. However, by resisting mating attempts, females are selecting for most 'persistent' males. Could it be that offspring of such 'persistent' males have higher fitness? If yes, female resistance can be viewed as a way of selecting for males that provide their offspring with 'good genes'.

We manipulated female choosiness by altering female ability to reject unwanted males in Adzuki beetle. Female beetles are constantly harassed by ardent males and thwart male mating attempts by vigorously kicking the unwanted suitors with their hind legs. We fitted females with prongs that reduced male ability to impose copulations. Alternatively, we reduced females' ability to resist copulations by shortening their hind legs. Females with increased ability to reject male mating attempts
'/>"/>

Contact: Alexei Maklakov
Alexei.Maklakov@ebc.uu.se
461-847-1270
Uppsala University
Source:Eurekalert

Page: 1 2

Related biology news :

1. Sex is thirst-quenching for female beetles
2. UT Southwestern researchers identify hundreds of genes controlling female fertility
3. Why do males and females frequently differ in body size and structure?
4. X-effect: female chromosome confirmed a prime driver of speciation
5. Vaginal reconstruction not needed for most inter-sex females, Hopkins study shows
6. Gene in male fish lures females into sex
7. New evidence for female control in reproduction
8. Men unaware of their cancer risk when female relatives test positive for BRCA mutation
9. How do you know whether you are male or female?
10. Female katydids prefer mates cool in winter and hot in summer
11. Female concave-eared frogs draw mates with ultrasonic calls
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/11/2014)... the Wildlife Conservation Society shows that no-take zones ... species such as lobster, conch, and fish recover ... reef areas. , The reporttitled "Review of the ... research literature from no-take areas around the world. ... a recognized expert in marine protected areas and ...
(Date:7/11/2014)... 11, 2014--Researchers at the Department of Energy,s Oak ... awards, presented by R&D Magazine in recognition of ... awards recognize the tremendous value of our National ... and development at the National Labs continues to ... pursue the scientific and technological innovations necessary to ...
(Date:7/11/2014)... South Wales, Australia when NASA,s Aqua satellite passed overhead ... 11 (12:35 p.m. local time/11:35 p.m. EDT on July ... (NSW), the Moderate Resolution Imaging Spectroradiometer (MODIS) aboard captured ... smoke (light brown) from various fires. Actively burning areas, ... , The New South Wales, Australia Government website "NSW ...
Breaking Biology News(10 mins):Belize's lobster, conch, and fish populations rebuild in no-take zones 2ORNL wins eight R&D 100s 2ORNL wins eight R&D 100s 3ORNL wins eight R&D 100s 4
... leading provider of,embedded speech solutions today announced the ... AG, according to SVOX CEO Volker Jantzen.,SVOX has ... developed,over 25 years, including the SpeechAdvance(TM) speech recognition ... majority of the Professional,Speech Processing Group,s employees will ...
... MAYWOOD, Ill. -- Most people know that too much sodium ... suggests that people trying to lower their blood pressure should ... effect to sodium. Researchers found that the ratio of ... cardiovascular disease than sodium or potassium alone. "There ...
... officials from the U.S. National Science Foundation and the ... today marked the occasion of the research vessel JOIDES ... and transit to Honolulu, after a complete transformation to ... The JOIDES Resolution is the U.S. research ...
Cached Biology News:SVOX Acquires Speech Processing Unit of Siemens AG, Expands Into Speech Recognition and Speech Dialog 2Cutting salt isn't the only way to reduce blood pressure 2Ocean research officials hail completion of modernization for US scientific ocean drilling vessel 2
(Date:7/11/2014)... BCC Research ( http://www.bccresearch.com ) reveals ... REACTION (PCR) TECHNOLOGY: GLOBAL MARKETS , the global market ... $140 billion in 2013. This is estimated to grow ... annual growth rate (CAGR) of 28.6%. , New digital ... exciting possibilities within the broader PCR field. The opportunities ...
(Date:7/11/2014)... AZ (PRWEB) July 11, 2014 ... device company specializing in the soft tissue reconstruction ... All-Suture Anchor System for surgeries involving the shoulder ... fixation through a novel, inserter-controlled deployment method. The ... to partial deployment, anchor pull-out, or anchor displacement ...
(Date:7/10/2014)... Understanding the need for better quality and ... gap that currently exists in this area, ChanTest has ... of validated ion channel and GPCR cell lines. ... ion channels control many critical physiological functions throughout the ... potential to treat a variety of human diseases. ...
(Date:7/10/2014)... Los Angeles, CA (PRWEB) July 10, 2014 ... Analytical and Bioanalytical techniques during 18-20 August, 2014 at ... to critically review the recent developments in Analytical & ... across the globe. , Speaking on this occasion, Dr. ... that Analytica Acta conference is a remarkable one ...
Breaking Biology Technology:Global Market for Digital Polymerase Chain Reaction Technology to Reach $490 Billion by 2018; Equipment Sector Accounts for the Fastest Growing Segment With 33% CAGR 2Global Market for Digital Polymerase Chain Reaction Technology to Reach $490 Billion by 2018; Equipment Sector Accounts for the Fastest Growing Segment With 33% CAGR 3Cayenne Medical Launches SureLock™ All-Suture Anchor System for Shoulder and Extremity Surgery 2Cayenne Medical Launches SureLock™ All-Suture Anchor System for Shoulder and Extremity Surgery 3Leader in Ion Channel Research Announces Newly Validated and Re-Engineered Cells 2Leader in Ion Channel Research Announces Newly Validated and Re-Engineered Cells 3A Critical Review of Analytical Techniques for Improved Living Standards 2A Critical Review of Analytical Techniques for Improved Living Standards 3A Critical Review of Analytical Techniques for Improved Living Standards 4
... in the late 1970s with the first IPOs taking place in ... than 25 years old. , ,An interesting article in Genetic ... that most industry cycles run about 50 years until they mature. ... 50-year cycle. A new industry of significance usually produces an industrial ...
... In a long-planned departure from its traditional focus, high-end ... the U.S. Army for development of two different products. ... that it has secured $2.2 million in federal contracts ... with the Armys Research, Development and Engineering Command (CERDEC) ...
... Mike Strand has always kept his eye out ... Delta Technology and Cray Research, Strand took a stride forward ... company based out of his home dealing with barcode software. ... had expanded into a worldwide enterprise bringing in close to ...
Cached Biology Technology:Biotech industry reaches midpoint in 50-year maturation cycle 2Biotech industry reaches midpoint in 50-year maturation cycle 3Biotech industry reaches midpoint in 50-year maturation cycle 4Biotech industry reaches midpoint in 50-year maturation cycle 5SLE of Eau Claire lands $2.2 million in federal contracts 2SLE of Eau Claire lands $2.2 million in federal contracts 3Online Kiosks founder Mike Strand uses contest to screen new business plan 2Online Kiosks founder Mike Strand uses contest to screen new business plan 3
... Linkage: This CLS number ... created to easily match Cornings ... availability yet, please order under ... or contact customer service for ...
ID clarifier: With ethidium bromide (50 μg/ml)...
... cultured in DMEM and harvested at the log ... the antigens in their native forms, cells were ... on a 12-well (5 mm) adhesive coated slide, ... cellular attachment and to minimize background staining. ...
... Pre-tested for optimal ... support the growth of ... for methylcellulose colony-forming assays ... hematopoietic cells. Not suitable ...
Biology Products: