Navigation Links
UCLA life scientists' study of abalone yields new insights into sexual reproduction
Date:8/4/2011

In new research that could have implications for improving fertilization in humans and other mammals, life scientists studied interactions between individual sperm and eggs in red abalone, an ocean-dwelling snail, and made precise chemical measurements and physical models of these interactions. They are the first scientists to do so.

By simulating the natural habitat of the abalone in the laboratory, the scientists were able to determine the conditions under which spermegg encounters and fertilization were most likely to occur.

"If we can understand the basic physics, chemistry and biology of reproduction, then moving from one species to the next is like dotting I's and crossing T's," said the study's lead author, Richard Zimmer, a UCLA distinguished professor of ecology and evolutionary biology.

Red abalone live in ocean crevices and spawn year-round, with females releasing several million eggs and males releasing up to 10 billion sperm directly into the ocean, Zimmer said.

In 2002, Zimmer's research team identified a molecule called tryptophan that is released by female abalone eggs to attract sperm. Now Zimmer and Jeffrey Riffell, an assistant professor of biology at the University of Washington, report that the released tryptophan creates a plume around the egg, greatly enlarging the target area for sperm, in much the same way using a larger tennis racket increases the chances of hitting the ball. The plume increases the egg size by a factor of five, the researchers said.

In addition, the egg has to release very little tryptophan to increase its target area, Zimmer and Riffell report in the journal Proceedings of the National Academy of Sciences. The research is currently online and will be in published an upcoming print edition of the journal.

"We established that less than 1 percent of an egg's tryptophan reserves are used by eggs to communicate with sperm," Zimmer said. "The egg does
'/>"/>

Contact: Stuart Wolpert
swolpert@support.ucla.edu
310-206-0511
University of California - Los Angeles
Source:Eurekalert

Page: 1 2 3 4

Related biology news :

1. Jefferson scientists deliver toxic genes to effectively kill pancreatic cancer cells
2. Scientists identify novel inhibitor of human microRNA
3. Argonne scientists peer into heart of compound that may detect chemical, biological weapons
4. MU scientists go green with gold, distribute environmentally friendly nanoparticles
5. Scientists identify gene that may contribute to improved rice yield
6. Scientists discover why a mothers high-fat diet contributes to obesity in her children
7. MU scientists see how HIV matures into an infection
8. Earth scientists keep an eye on Texas
9. Thinking it through: Scientists call for policy to guide biofuels industry toward sustainability
10. Scientists identify a molecule that coordinates the movement of cells
11. Scientists Find new migratory patterns for Mediterranean and Western Atlantic bluefin tuna
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/2/2015)... 2015 Fingerprint Cards (FPC) has ... from the distributor World Peace Industrial Group (WPI), part ... although the major part of the shipments will take ... by smartphone manufacturers in China . ... the communicated revenue guidance of + 1 000 MSEK for ...
(Date:3/30/2015)... 2015 Research and Markets ( http://www.researchandmarkets.com/research/lc9bnl/global_gesture ... Gesture Recognition Market in Automotive Sector 2014-2018" report ... Global Gesture Recognition market in Automotive Sector to grow ... Gesture recognition is the ability of a ... an individual. Gesture recognition technology can be 2D-based or ...
(Date:3/24/2015)... PALM BEACH GARDENS, Fla. , March 24, ... of biometric identity management solutions, today announced that ... enabling premium clothing accessory retailer Goorin Bros ... login. The Crossmatch biometrics-based solution secures access to ... customers from the increased risk of data breaches. ...
Breaking Biology News(10 mins):Fingerprint Cards Receives Touch Fingerprint Sensor Order of SEK 110 Million 2Global Gesture Recognition Market in Automotive Sector Report 2015 - Growing Number of Partnerships 2Crossmatch Fingerprint Readers Help Retailer Prevent Data Breaches at Point-of-Sale 2
... the University of Turin, Italy and the University of ... may help the medical community to determine the genetic ... in an article published March 21st in the open-access ... diseases originate from mutations in one or more genes. ...
... after most of Costa Rica,s rainforests were cut down, researchers ... many thought was impossible - restoring a tropical rainforest ecosystem. ... Rica with a sampling of local trees, native species began ... rainforests can one day be replaced. Carl Leopold and ...
... in a patient lying on an operating table, while another ... be in a real OR or treatment room, except that ... made theyre robots., These high-tech, electronically outfitted mannequins are ... training center at the Johns Hopkins Outpatient Center in East ...
Cached Biology News:Can you rescue a rainforest? The answer may be yes 2Actor-robots 'staff' part of new $5M simulation training center 2
(Date:4/30/2015)... , April 30, 2015  Pfenex Inc. (NYSE ... the development of biosimilar therapeutics including high value ... closing of its previously announced underwritten public offering ... a public offering price of $15.50 per share. ... underwriters of their option to purchase up to ...
(Date:4/30/2015)... FRANCE (PRWEB) April 30, 2015 ... and at http://www.lespausa.com , Fleur’s ... multi-action product combining the benefits of makeup, skin ... This subtly tinted cream is designed with specific ... for an even complexion and a healthy glow. ...
(Date:4/30/2015)... (PRWEB) April 30, 2015 Sterlitech ... ultrafiltration membranes, the PX, PY, and PZ ... sheets, and disks. Designed to be ideal ... new membranes can fill critical process requirements where ... downstream processes. , “New regulations on industrial wastewater ...
(Date:4/29/2015)... --  Doximity , the leading online medical network with ... announced a new, instant method for physicians to apply ... click, all US physicians can quickly submit their verified ... open job opportunity, and a recruiter will reach out ... of physicians are open to new jobs, and yet ...
Breaking Biology Technology:Pfenex Inc. Announces Closing of Public Offering of Common Stock and Full Exercise of Underwriters' Option to Purchase Additional Shares 2Fleur’s Introduces CC CRÈME Perfect Skin Solution 2Fleur’s Introduces CC CRÈME Perfect Skin Solution 3Sterlitech Offers New Ultrafiltration Membranes 2Doximity Offering Hospitals Easy, Efficient Physician Application Tool 2
... April 29 A new, free white ... available from Spiral,Biotech, Inc. at: http://www.aicompanies.com/anoxomat ... isolating and identifying anaerobic bacteria in organisms., ... patient health, modern,clinical laboratories must ensure accurate, ...
... April 29 Core Informatics announces,that it has ... product,to BioRelix Pharmaceuticals of New Haven, CT. BioRelix, ... need to establish a,strong data management infrastructure from ... LIMS marketplace, BioRelix choose the Core LIMS., ...
... Aflac and the American,Association for Cancer Research ... Career Development Award for Childhood Cancer Research,endowed by ... pediatric cancer. The award,which includes a two-year grant ... Meeting in San Diego, Calif., to Dr. Charles ...
Cached Biology Technology:White Paper Details New Techniques for Isolating, Identifying Anaerobic Bacteria and Organisms 2Core Informatics Delivers Enterprise Core LIMS Installation to BioRelix Pharmaceuticals 2Aflac and the American Association for Cancer Research Unite to Issue Inaugural Aflac Career Development Award for Childhood Cancer Research 2Aflac and the American Association for Cancer Research Unite to Issue Inaugural Aflac Career Development Award for Childhood Cancer Research 3
Bethyl Laboratories packages antibodies, conjugates and calibrators to provide quantitative ELISA kits. Each kit contains the following components, sufficient for 1000 single well assays....
Bethyl Laboratories packages antibodies, conjugates and calibrators to provide quantitative ELISA kits. Each kit contains the following components, sufficient for 1000 single well assays....
Bethyl Laboratories packages antibodies, conjugates and calibrators to provide quantitative ELISA kits. Each kit contains the following components, sufficient for 1000 single well assays....
Bethyl Laboratories packages antibodies, conjugates and calibrators to provide quantitative ELISA kits. Each kit contains the following components, sufficient for 1000 single well assays....
Biology Products: