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:7/10/2014)... The Marshall Institute for Interdisciplinary Research (MIIR) and ... Medicine today announced they will be partnering with ... drugs. , Under the agreement with Shanghai-based HD ... the costs and risks of discovery and development ... own any intellectual property and commercialization rights to ...
(Date:7/10/2014)... 2014 Amidst the astounding complexity of the billions ... the brain, how do nerve cells decide how far ... do they coordinate these events within the developing brain? ... campus of The Scripps Research Institute (TSRI) have shed ... particular protein plays a far more sophisticated role in ...
(Date:7/10/2014)... Ore. Nuclear engineers at Oregon State University have ... device that should help people all over the world ... intensity, and whether or not it poses a health ... to public demand following the nuclear incident in Fukushima, ... what level of radiation they were being exposed to ...
Breaking Biology News(10 mins):Marshall University to partner with international company in drug development venture 2Scripps Florida scientists shed new light on nerve cell growth 2Sophisticated radiation detector designed for broad public use 2Sophisticated radiation detector designed for broad public use 3
... research into cheetah cub survival has refuted the theory that ... cannot coexist in conservation areas. The study, published in the ... Kgalagadi Transfrontier Park were seven times more likely to survive ... found to be the cubs, main predatory threat. Previously, ...
... MA -- Researchers at MIT and Brigham and Women,s ... of intestinal stem cells, then stimulate them to develop ... intestinal cells. Using these cells, scientists could develop and ... colitis. The small intestine, like most other body ...
... approach to mapping how proteins interact with each other, ... aid in the design of new drugs for diseases ... artificial amino acids, the Salk scientists determine the detailed ... the molecule that turns it on. The switch--corticotrophin releasing ...
Cached Biology News:Researchers unlock a new means of growing intestinal stem cells 2Researchers unlock a new means of growing intestinal stem cells 3Salk scientists crack riddle of important drug target 2Salk scientists crack riddle of important drug target 3
(Date:7/10/2014)... Robert Harman, DVM, Founder and CEO of Vet-Stem, ... announce the relaunch of his highly informative blog, now named ... “ What are Stem Cells ?” Dr. Harman’s purpose ... in the basics of stem cell therapy so that pet ... of treatment when considering regenerative medicine. , A veterinarian by ...
(Date:7/10/2014)... Montreal, QC (PRWEB) July 10, 2014 ... comfort and convenience. This rejuvenating device now comes with a ... that develops over time. , The new cup is thinner ... This design works to target rough, thin and uneven surfaces ... original firm cup for a stimulating treatment on areas such ...
(Date:7/10/2014)... , July 10, 2014  Franciscan St. ... of capnography for respiratory monitoring outside the ... healthcare leaders in embracing state-of-the-art patient safety ... patients are breathing and can alert medical ... measuring the amount of carbon dioxide the ...
(Date:7/10/2014)...  Kainos Capital, a firm specializing in acquiring and ... has acquired the Slim-Fast brand from Unilever. Unilever will ... the transaction were not disclosed. Slim-Fast is ... markets ready-to-drink shakes, powders, bars and snacks to retail ... in the United Kingdom and ...
Breaking Biology Technology:Robert Harman, DVM Talks About What Stem Cells are in His Latest Blog Series for Vet-Stem, Inc. 2Robert Harman, DVM Talks About What Stem Cells are in His Latest Blog Series for Vet-Stem, Inc. 3Introducing a New Bonus Treatment Cup for EvoDerma’s NOOME Anti-Aging Motion 2Franciscan St. Anthony Health-Crown Point Underscores Patient Safety Commitment Through Expanded Use of Capnography 2Kainos Capital Acquires Slim-Fast From Unilever 2
... N.C. , May 13 Chimerix, Inc., ... the commencement of a first-in-human study of CMX157, a ... in vitro activity against both tenofovir-sensitive and tenofovir-resistant ... increase efficacy and decrease toxicity as compared to tenofovir, ...
... LA JOLLA, Calif. , May 13 Transdel ... focused on developing topically administered products using its proprietary transdermal ... March 31, 2010 .  The Company also highlighted recent ... , ...
... , DUBLIN and PHILADELPHIA , ... ), the global specialty biopharmaceutical company,announces that its subsidiary Shire LLC has ... Delaware against Actavis Elizabeth LLC and,Actavis Inc. (collectively "Actavis") for the ... and 6,811,794,(the ,794 patent). , , ...
Cached Biology Technology:Chimerix Initiates Phase 1 Study of CMX157 2Chimerix Initiates Phase 1 Study of CMX157 3Transdel Pharmaceuticals Reports First Quarter 2010 Results 2Transdel Pharmaceuticals Reports First Quarter 2010 Results 3Transdel Pharmaceuticals Reports First Quarter 2010 Results 4Transdel Pharmaceuticals Reports First Quarter 2010 Results 5INTUNIV(TM) - Shire Files Suit Against Actavis Elizabeth LLC and Actavis Inc. 2INTUNIV(TM) - Shire Files Suit Against Actavis Elizabeth LLC and Actavis Inc. 3
... include: Microarray hybridization chamber assembly (1 ... clamp, thumbscrew) Microarray chamber user guide ... intended to be cleaned and reused. The ... Catalog Oligo Microarray kits and all custom ...
... With the macro- and ... Hoagland and Arnon (1938). ... to contain 1.6 grams ... liter of medium. Physical ...
... separation and fractionation of nucleic-acid ... nuclei from cytosolic proteins A ... greatly facilitating study of low-abundance ... acid binding proteins (e.g., transcription ...
... modifications of Eagle's medium have ... formulation. The most widely used ... DME is a modification of ... that contains a higher concentration ...
Biology Products: