Navigation Links
A bug's (sex) life: Diving beetles offer unexpected clues about sexual selection
Date:2/6/2012

ate around," Higginson said. "As far as sperm goes, this is clearly unlike anything we have ever seen before."

In some species she found hundreds or even thousands of sperm cells stacked up like badminton birdies, forming a long, fairly rigid rod of sperm resembling a fuzzy worm as it moves around inside the female. In other species, sperm are connected by their heads with some kind of glue.

Higginson then set out to investigate what evolutionary forces are the most likely to drive all this unexpected diversity. In an unprecedented effort, she measured many different parameters such as overall sperm length, head length, tail length, length of the female ducts, area of the sperm storage chambers, presence of conjugates, head shape and so on. Using statistical tools to analyze evolutionary relationships among traits, she then reconstructed the most likely evolutionary relationships between sperm and female reproductive tracts.

"We can reconstruct what the ancestors of these diving beetles looked like," Higginson explained. "We find they had conjugated sperm and rather compact female reproductive tracts. The female morphology undergoes evolutionary change, and then sperm compensates for that. We can't say from this study that the males are catching up but it's suggesting there could be an arms race."

Pitnick said: "When you look at the intricate morphology of the reproductive tracts, you can't help but think that sperm needs Swiss army knives and compasses to make it through there. The females make it really complicated."

"In most cases of sexual selection, we expect co-evolution between a female preference for a male trait, like flashy tails in peacocks," Higginson said. "Females prefer males with flashy tails, and then females want bigger and flashier tails after that, setting up a co-evolutionary cycle. We are not positive that this is happening here, but is possible that all this diversity we see in the sperm is the equi
'/>"/>

Contact: Daniel Stolte
stolte@email.arizona.edu
520-626-4402
University of Arizona
Source:Eurekalert  

Page: 1 2 3 4

Related biology news :

1. Latest on malaria, dengue, radiation threats, bedbugs, cholera in Haiti at ASTMH Annual Meeting
2. Tuning natural antimicrobials to improve their effectiveness at battling superbugs
3. Hummingbirds catch flying bugs with the help of fast-closing beaks
4. Scientists develop a fatty kryptonite to defeat multidrug-resistant Super bugs
5. Scorpion venom -- bad for bugs, good for pesticides
6. UGA studies explain spread of invasive ladybugs
7. Can engineered bugs help generate biofuels? Study holds promise
8. Predatory bugs can save cornfields
9. Apathetic aphids with attitude become easier prey for ladybugs
10. Bees help to beat MRSA bugs
11. First preliminary profile of proteins in bed bugs saliva
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
A bug's (sex) life: Diving beetles offer unexpected clues about sexual selection
(Date:7/11/2014)... the Department of Energy,s Oak Ridge National Laboratory ... R&D Magazine in recognition of the year,s top ... tremendous value of our National Labs," said Secretary ... the National Labs continues to help our nation ... and technological innovations necessary to remain globally competitive." ...
(Date:7/11/2014)... release is available in German . ... a method that uses the refraction of X-rays through ... images produced with this method are often of much ... in the team of Prof. Franz Pfeiffer are particularly ... and therapy including X-ray phase-contrast imaging. One main ...
(Date:7/11/2014)... with other group members to reduce aggression and gain ... strategy for grooming activities shows a certain pattern across ... scientific journal Biology Letters . , Grooming between ... without ulterior motives. To be groomed has hygienic benefits ... another individual can provide access to infants, mating opportunities ...
Breaking Biology News(10 mins):ORNL wins eight R&D 100s 2ORNL wins eight R&D 100s 3ORNL wins eight R&D 100s 4New simple setup for X-ray phase contrast 2Baboons groom early in the day to get benefits later 2
... December 15, 2009 Signal Hill, CA Tom ... public and president of Bowman Global Change, has developed ... the fourth Intergovernmental Panel on Climate Change (IPCC) report ... to the authentic scientific information they need to make ...
... , REDWOOD CITY, Calif., Dec. ... and authentication solutions, today announced an agreement with IBM ... fingerprint technology on IBM SurePOS 500 retail systems. The ... easily and quickly identify users so that specific transactions ...
... ... Dec. 8, 2009 National Instruments (Nasdaq: NATI ), ... a leader and pioneer in manufacturing automation using robotics technology, ... technology with DENSO robotic arms. The collaboration increases productivity and ...
Cached Biology News:Bowman creates graphic translation of climate change data 2DigitalPersona Fingerprint Sensor Technology Ships on IBM SurePOS 500 Retail Systems 2National Instruments and DENSO Robotics Collaborate to Address New Applications in Industrial Robotics 2National Instruments and DENSO Robotics Collaborate to Address New Applications in Industrial Robotics 3National Instruments and DENSO Robotics Collaborate to Address New Applications in Industrial Robotics 4National Instruments and DENSO Robotics Collaborate to Address New Applications in Industrial Robotics 5
(Date:7/10/2014)... CA (PRWEB) July 10, 2014 OMICS ... Bioanalytical techniques during 18-20 August, 2014 at Double Tree ... review the recent developments in Analytical & Bioanalytical research ... globe. , Speaking on this occasion, Dr. Srinubabu Gedela, ... Analytica Acta conference is a remarkable one in bringing ...
(Date:7/10/2014)... 10, 2014  Franciscan St. Anthony Health-Crown ... for respiratory monitoring outside the operating room, ... in embracing state-of-the-art patient safety technology. ... breathing and can alert medical caregivers when ... amount of carbon dioxide the patient is ...
(Date:7/10/2014)... PROVO, Utah , July 10, 2014 ... genome annotation and interpretation, today announced an ... sequencing (NGS) analytics for Lineagen,s NextStep Dx ... evaluation of neurodevelopmental and neurological disorders, currently ... chromosomal microarray (CMA) testing service used by ...
(Date:7/10/2014)... D.C., April 15, 2014 -- According to the ... to nuclear security comes from terrorists acquiring sufficient ... to construct a crude nuclear explosive device. The ... nuclear trafficking have involved gram-level quantities, which can ... , According to a new study appearing this ...
Breaking Biology Technology:A 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 4Franciscan St. Anthony Health-Crown Point Underscores Patient Safety Commitment Through Expanded Use of Capnography 2Tute Genomics Platform Selected to Provide Clinical Interpretation for Lineagen's NextStepDx PLUS Next-Generation Sequencing-Based Diagnostic Test 2Tute Genomics Platform Selected to Provide Clinical Interpretation for Lineagen's NextStepDx PLUS Next-Generation Sequencing-Based Diagnostic Test 3Tute Genomics Platform Selected to Provide Clinical Interpretation for Lineagen's NextStepDx PLUS Next-Generation Sequencing-Based Diagnostic Test 4Sensitive detection method may help impede illicit nuclear trafficking 2
... Corporation, (OTC Bulletin Board: CDXC) a leader in ... financial results for the 2008 Fiscal Year. On ... Generally Accepted Accounting Principles (U.S. GAAP), ChromaDex announced ... $0.07 per share for the twelve months ended ...
... April 3 InterMune, Inc. (Nasdaq: ITMN ) ... Officer of InterMune, will present at the Canaccord Adams Hepatitis ... To access a live audio webcast of the presentation, ... investor relations page of InterMune,s corporate website at www.intermune.com ...
... Inc. (Nasdaq: TPTX ) today announced that on ... Qualifications Department of the Nasdaq Stock Market ("Nasdaq") notifying the ... in its Annual Report on Form 10-K for the year ... the minimum stockholders, equity requirement of $10 million for continued ...
Cached Biology Technology:ChromaDex Announces 2008 Year End Financial Results 2ChromaDex Announces 2008 Year End Financial Results 3TorreyPines Therapeutics Receives Notice of Non-Compliance with Nasdaq Continued Listing Requirements 2
...
... Crystal / Mount is the standard water ... designed especially for the permanent preservation of ... It is easy to use and exhibits ... the first aqueous mounting medium that permits ...
Antibodies were affinity purified using epitopes specific to XLF immobilized on solid support....
Request Info...
Biology Products: