Navigation Links
UCLA life scientists' study of abalone yields new insights into sexual reproduction
Date:8/14/2011

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. Scientists highlight link between stress and appetite
2. Scientists link shifting Atlantic mackerel distribution to environmental factors, changing climate
3. Scientists identify mutation in SIGMAR1 gene linked to juvenile ALS
4. Carnegie Mellon scientists discover how molecular motors go into energy save mode
5. Scientists copy the ways viruses deliver genes
6. Scientists explore the role of aeroecology in bat conservation and ecosystem health
7. Good prion-like proteins boost immune response, UT Southwestern scientists report
8. Many top US scientists wish they had more children
9. UCLA life scientists study of abalone yields new insights into sexual reproduction
10. USDA scientists study effects of rising carbon dioxide on rangelands
11. Scientists identify what makes us feel bad when were sick, how to treat it
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:8/31/2014)... for sniffing the highly infectious bacteria C. diff ... been developed by a team at the University of ... has demonstrated that it is possible to identify the ... lead to rapid diagnosis of the condition., What is ... to identify different strains of the disease simply from ...
(Date:8/31/2014)... Nature Climate Change , suggests that if current ... exceed, the global targets for total greenhouse gas (GHG) emissions ... all think carefully about the food we choose and its ... is just one of a number of actions that need ... there is enough food for all. , As populations ...
(Date:8/29/2014)... 2014) Scientists at the Barshop Institute for Longevity ... at the UT Health Science Center at San Antonio, ... of the longest-lived rodent, the naked mole rat. ... of naked mole rats protects and alters the activity ... obsolete proteins. , The factor also protects proteasome function ...
Breaking Biology News(10 mins):Scientists develop 'electronic nose' for rapid detection of C. diff infection 2Changing global diets is vital to reducing climate change 2Changing global diets is vital to reducing climate change 3Changing global diets is vital to reducing climate change 4Factor in naked mole rat's cells enhances protein integrity 2
... rate of pine tree seedlings by changing when and ... "There's been too many (reforestation) failures over the last ... Extension forestry specialist. , "Some landowners have had to ... row because of poor seedling survival." , Second-year data ...
... The University of Texas M. D. Anderson Cancer Center ... so that it permanently hampers breast cancer development. The ... in some human breast tumors, thus reducing the cancer's ... the annual meeting of the American Association for Cancer ...
... Carolina at Chapel Hill is one of five clinical ... of Health to study why good medications are sometimes ... years, the Drug-Induced Liver Injury Network, or DILIN, will ... by prescription and over-the-counter medications, nutritional supplements, alternative medicines ...
Cached Biology News:Shift of weather patterns necessitates rethinking of reforestation methods 2Shift of weather patterns necessitates rethinking of reforestation methods 3Used in a new way, RNA interference permanently silences key breast cancer gene 2UNC launches study of liver injury caused by drugs 2
(Date:8/30/2014)... The Global and China Electrical Insulating ... on the current state of the Electrical Insulating ... report provides a basic overview of the industry, ... market analysis and Chinese domestic market analysis are ... and competitive landscape of the market. A comparison ...
(Date:8/29/2014)... Pittcon is pleased to announce that the ... Horiba Scientific, have organized a session on nanotechnology for ... , Asia’s largest analytical and scientific instruments show, will ... , The four speakers in this U.S. symposium, ... to Single Cells” will present their use of nanotechnology ...
(Date:8/29/2014)... (PRWEB) August 29, 2014 A major ... the biotech start-up dense realm of Boston-Cambridge, is gaining ... able investors. James Sherley, the Director of Boston’s Adult ... the local and national visibility of his company an ... 2013. , In addition to a social media marketing ...
(Date:8/28/2014)... August 28, 2014 “This kit has an ... screen from 0 to 150 ppb,” said Mark Tess, PhD, ... significant benefit to plant owners and USDA-GIPSA inspection agencies that ... commodities. Testing can take place in a matter of minutes ... the plant test the feed and grain before accepting it, ...
Breaking Biology Technology:Electrical Insulating Varnish Market World, China Regional Analysis & 2020 Forecasts Available at DeepResearchReports.com 2Electrical Insulating Varnish Market World, China Regional Analysis & 2020 Forecasts Available at DeepResearchReports.com 3Fifth Annual U.S. Symposium at JASIS Organized by Pittcon’s Program Chairman Hub MacDonald 2The Adult Stem Cell Technology Center, LLC Participates in Multiple Stem Cell and Regenerative Medicine Conferences Before Year End 2The Adult Stem Cell Technology Center, LLC Participates in Multiple Stem Cell and Regenerative Medicine Conferences Before Year End 3The Adult Stem Cell Technology Center, LLC Participates in Multiple Stem Cell and Regenerative Medicine Conferences Before Year End 4
... today announced a commitment of more than a half million ... the ACC Foundation to fund and support a new ACC ... $530,000 contribution will be to offer financial support through research ... ,This awards program is an investment in young researchers and ...
... between Wisconsins biotechnology sector and other well-established biotech regions ... Engineering News featuring Wisconsins biotech sector as Americas ... leaders. , ,The East and West Coasts are often ... to flourish, some believe Wisconsin is catching up. According ...
... as social networking has. In fact, I get more mail when ... all other topics combined. (Something I suppose I should keep in ... ,Last week, I wrote that social networking "eludes a business model ... in actively working the network to your business benefit. Whatever the ...
Cached Biology Technology:Wisconsin's biotech industry recognized by national publication 2Social networks: Readers respond 2Social networks: Readers respond 3Social networks: Readers respond 4
...
... the first all-inclusive collection of key procedures ... System. Methods developed by the leaders in ... protocols. This book will guide you from ... construction and analysis, to production of your ...
...
...
Biology Products: