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

not want to give up tryptophan. The egg sequesters tryptophan and releases just a whiff just enough to attract a sperm. It's an effective, evolved trick to enhance the likelihood of an encounter between sperm and egg. There is essentially no cost to the egg for this very effective communication system."

An abalone egg also uses tryptophan for constructing an embryonic nervous system and building neurotransmitters, as well as for other purposes, Zimmer said.

But the success of the egg's plume in attracting sperm, as well as sperm motility and other elements of the fertilization process, are greatly influenced by ocean flow conditions. Therefore, the biologists analyzed the physics of fluid motion in mediating spermegg interactions.

"The effect is huge, and was previously unsuspected," said Zimmer, who is a member of UCLA's neuroscience program. "The physics of fluid motion has a profound consequence on the ability of sperm to navigate and find an egg, and therefore on fertilization. We have identified the principal mechanisms by which eggs and sperm communicate and interact within an environment that has fluid motion. The method by which sperm in humans search for and find an egg seems to be the same process as in abalone. Similar fluid dynamics operate whether in the turbulent ocean environment or within a mammalian reproductive tract.

"It appears the forces imposed by fluid motion have acted as selective forces in the evolution of the communication system between sperm and egg within abalone. I expect that we will be able to describe the specific environmental conditions within the human reproductive system that will maximize the likelihood of contact between sperm and egg. The physical and chemical environments are actually quite similar."

Zimmer and Riffell, who was formerly a graduate student in Zimmer's lab, conducted fieldwork at San Diego's Point Loma. They employed tiny sensors in a novel way, using Dop
'/>"/>

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:10/15/2014)... spreading rapidly and to an unexpected extent. The outbreak ... and the virus shows a new disease dynamic in ... this reason, the German National Academy of Sciences Leopoldina, ... and the Union of the German Academies of Sciences ... epidemic today. , In the statement the academies call ...
(Date:10/15/2014)... VILNIUS, Lithuania , Oct. 15, 2014 /PRNewswire/ ... identification technologies, today announced the availability of the ... . VeriLook Surveillance 3.0 provides real-time biometric face ... multiple high-resolution digital surveillance cameras. The new version ... detects and differentiates people from objects while they ...
(Date:10/14/2014)... house fly genome for the first time, revealing robust ... that thrives in pathogen-rich dung piles and garbage heaps. ... Genome Biology , will increase understanding of house ... adapt to resist insecticides, which could lead to novel ... and transmit more than 100 human and animal diseases, ...
Breaking Biology News(10 mins):Academies call for consequences from the Ebola virus epidemic 2Academies call for consequences from the Ebola virus epidemic 3Academies call for consequences from the Ebola virus epidemic 4Academies call for consequences from the Ebola virus epidemic 5VeriLook Surveillance 3.0 SDK Identifies Faces and Moving Objects, Differentiates Pedestrians from Other Moving Objects in Video Surveillance Systems 2VeriLook Surveillance 3.0 SDK Identifies Faces and Moving Objects, Differentiates Pedestrians from Other Moving Objects in Video Surveillance Systems 3House fly genome reveals expanded immune system 2
... commonly cultivated cacao plant in the world is revealed ... Researchers have utilised high quality DNA sequences to demonstrate the ... can lead to higher yielding cocoa plants that still produce better ... cacao tree ( Theobroma cacao L. ), but ...
... Plymouth University, and the Universidad Federal da Bahia in ... diversity and density of coral colonies off the coast ... El Nio event of 1997-98, creating an opportunity for ... major environmental incident of this nature can have on ...
... ecology has centered on the role of microbes in ... print in the journal Applied and Environmental Microbiology ... Australia, and collaborators show how changes in the populations ... at ecosystem levels. "Ecological theories developed for ...
Cached Biology News:Genome hints at markers for higher-producing, better-tasting chocolate 2Catastrophic climatic events leave corals facing a decade-long fight for recovery 2
(Date:10/22/2014)... SAN DIEGO and HONG KONG ... an innovative rare disease therapeutics enterprise, announced today that ... joined the company as vice president, research. Dr. McKew ... research, including key leadership positions at the National Institutes ... to its acquisition by Wyeth). Dr. McKew will lead aTyr,s ...
(Date:10/20/2014)... Richardson, Texas (PRWEB) October 20, 2014 ... today announced that a team from Iowa State University ... * design contest. Using a Convey HC-2ex, the team’s ... than 14 times faster than the second place finisher. ... academic world embarked upon the month long challenge, using ...
(Date:10/20/2014)... 20, 2014 , A major ... and the delivery of care has revealed changing trends ... inequalities in the provision of healthcare services across the ... by United European Gastroenterology (UEG), have been announced today ... awareness of the burden of GI disorders across ...
(Date:10/20/2014)... 20, 2014 OncLive® ... Cancer Center at Thomas Jefferson University has joined ... the Strategic Alliance Partnership program, the Sidney Kimmel ... to raise awareness of the Center’s cutting-edge research ... projects. Clinicians and other health care professionals from ...
Breaking Biology Technology:aTyr Pharma Appoints John C. McKew, Ph.D., as Vice President, Research 2aTyr Pharma Appoints John C. McKew, Ph.D., as Vice President, Research 3Team from Iowa State Wins 2014 MemoCODE Design Contest Using Convey HC-2ex 2Team from Iowa State Wins 2014 MemoCODE Design Contest Using Convey HC-2ex 3Major Survey Reveals Changing Trends and Inequalities in Healthcare Provision for Gastrointestinal Disorders Across Europe 2Major Survey Reveals Changing Trends and Inequalities in Healthcare Provision for Gastrointestinal Disorders Across Europe 3Major Survey Reveals Changing Trends and Inequalities in Healthcare Provision for Gastrointestinal Disorders Across Europe 4Major Survey Reveals Changing Trends and Inequalities in Healthcare Provision for Gastrointestinal Disorders Across Europe 5Sidney Kimmel Cancer Center at Thomas Jefferson University Partners With OncLive 2Sidney Kimmel Cancer Center at Thomas Jefferson University Partners With OncLive 3
... Today, the rights to Verus,Pharmaceuticals, pediatric asthma ... for aerosol delivery were acquired by,AstraZeneca. Following ... 2006, this is the second major pharmaceutical ... in the development pipeline. Included in ...
... Sciences Company,s Leadership Team, INDIANAPOLIS, Sept. 24 ... short-term and long-term biomaterials storage,sample management and cold ... sciences leader, joins the company as vice president ... created position, Ball is responsible for the company,s,worldwide ...
... into Sample Analysis Systems-, PHILADELPHIA, Sept. ... nanoscale whole genome imaging and analytic,platforms for ... announced the issuance of a patent for ... analyzer. The patent covers a novel technique ...
Cached Biology Technology:Pediatric Asthma Programs Featuring PARI Pharma's eFlow Acquired by AstraZeneca 2BioStorage Technologies Appoints Lori Ball as Vice President 2BioStorage Technologies Appoints Lori Ball as Vice President 3BioNanomatrix Announces Issuance of Key Nanofluidics Patent Enabling Single Molecule Whole Genome Analysis 2BioNanomatrix Announces Issuance of Key Nanofluidics Patent Enabling Single Molecule Whole Genome Analysis 3
... Highly-purified, endotoxin-free plasmid DNA preparations ... plasmids in quantities from 1mg to ... well as large-scale (100mg-multi-gram) preparations are ... Each preparation is formulated according to ...
... polypeptide hormones which belong to the ... TGF- superfamily is a large group ... many aspects of development, reproductive function ... incude TGF-s, bone morphogenetic proteins, growth ...
... animal systems need to be able to handle ... access ports, as well as interface with telemetry ... and more, particularly with dogs, pigs, and primates. ... delayed starting time, and the computer can be ...
The new Silencer siRNA Starter Kit is perfect for researchers new to RNAi. It provides all of the reagents, protocols, and instructions necessary to get underway with siRNA transfection and ensure su...
Biology Products: