Navigation Links
When cooperation counts
Date:7/30/2014

ecreasing -- they swim in a straighter line."

The study, also found that sperm from promiscuous mice were more likely to form clumps of the optimum size, and that, when compared with sperm from Peromyscus polionotus a closely-related, but monogamous, species of mouse the trait is likely driven by sexual selection.

The new paper builds on a 2010 study conducted in Hoekstra's lab which found that sperm cells preferentially clump with those produced by the same male. Spurred by that earlier paper, Mahadevan approached Hoekstra with the idea of creating a mathematical model to understand whether and how sperm received an advantage by forming groups.

"I read the paper and thought we could make a quantitative theory of the observations they had made," he said. "But of course, the only way to know whether any model was capable of anything predictive was to make it testable.

"In this contextthe question was: Is it possible to make the aggregate do better than then individual?" he continued. "One way to do that is to get all the tails to synchronize, but that doesn't happen. The other way is to cancel out the random motion of the individuals in an aggregate because the sperm adhere to each other. Eventually, for large aggregates, the sperm point towards each other and thus cannot swim at all. This mechanism when quantified in a model that Luca and I developed and this led to testable predictions., When Heidi did the experiment, we found that this was essentially correct."

In addition to finding that sperm which group together to swim in a more linear fashion, researchers were able to identify at what clump size sperm reaped the largest reward for grouping together. Groups with too few cells, Hoekstra said, continued to swim along more meandering paths, while much larger groups often resulted with sperm swimming against each other.

"What we found is that both species have an optimum at around eight, which was wha
'/>"/>

Contact: Peter Reuell
preuell@fas.harvard.edu
617-496-8070
Harvard University
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Sibling cooperation in earwig families gives clues to early evolution of social behavior
2. What cooperation and conflict in an insects society can teach us about social acceptance
3. Rewards facilitate human cooperation under natural selection
4. Delayed gratification hurts climate change cooperation
5. Leopoldina signs cooperation agreement with the Academy of Science of South Africa
6. Southerners are less trusting, but trust is a factor in environmental cooperation, study shows
7. Study: MicroRNA cooperation mutes breast cancer oncogenes
8. Leopoldina strengthens cooperation with French national academy
9. JRC and US NOAA enhance cooperation on climate, weather, oceans and coasts
10. BGI, University of Helsinki and Wuhan University sign a MOU concerning cooperation on genomics
11. Suburban sprawl accounts for 50 percent of US household carbon footprint
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:11/21/2014)... Nov. 19, 2014  Earlier this year Donald ... College, and one of the most prolific inventors in ... are transmitted from Smartphones to third party agencies. Spector ... has one of the earliest known patents in this ... in the military, child care, elder care and hospital ...
(Date:11/21/2014)... Nov. 20, 2014   Atmel® Corporation (NASDAQ: ... (MCU) and touch technology solutions, today launched the industry,s ... with the widest V cc range from 1.7V ... and faster I 2 C bus communication speeds, and ... memory making them ideal for consumer, industrial, computer, and ...
(Date:11/18/2014)... The Parenteral Drug Association (PDA) today confirmed that seven officials ... least seven more will participate in the upcoming 2014 PDA ... Washington D.C. , Dec. 2-4. ... the regulatory agencies in the United States ... to help advance the use of metrics in the regulatory ...
Breaking Biology News(10 mins):Patented Biosensor Wearable Technology Provides a More Civilized Method of Quarantine 2Patented Biosensor Wearable Technology Provides a More Civilized Method of Quarantine 3Patented Biosensor Wearable Technology Provides a More Civilized Method of Quarantine 4Atmel Launches Industry's First Wide-V(cc) Low-Power Temperature Sensor Family 2Atmel Launches Industry's First Wide-V(cc) Low-Power Temperature Sensor Family 3Atmel Launches Industry's First Wide-V(cc) Low-Power Temperature Sensor Family 4FDA's Janet Woodcock, EMA's Emer Cooke Headline PDA Quality Metrics Conference 2
... bacteria exist as aggressive pathogens, causing diseases ranging from ... syndrome, others play a less malevolent role and some ... study, Cheryl Nickerson and her group at ASU,s Biodesign ... Van de Wiele and lead author Rosemarie De Weirdt ...
... participation in scientific research has deep roots in the ... has taken off spectacularly from launch pads across the ... communications technology and a sea change in a scientific ... Citizen science, crowd-sourced science, DIY research, volunteer monitoring, ...
... A study comparing whether endothelial colony-forming cells (ECFCs) derived from ... are more proliferative and better for forming new blood vessels ... vasculogenic., The study, carried out by researchers at the Indiana ... Cell Medicine [2(3)] and is freely available on-line ...
Cached Biology News:Beneficial bacteria may help ward off infection 2Beneficial bacteria may help ward off infection 3Beneficial bacteria may help ward off infection 4Beneficial bacteria may help ward off infection 5Inaugural cross-disciplinary Public Participation in Scientific Research conference 2Blood vessel forming potential of stem cells from human placenta and umbilical cord blood 2
(Date:11/26/2014)... November 25, 2014 Continuing its award-winning ... earned three prestigious MarCom Awards for outstanding creative achievement ... a Platinum MarCom Award, the organization’s top honor, in ... St. Louis held in April of this year. The ... 14,000 attendees. Additionally, Nerium was awarded a Gold MarCom ...
(Date:11/26/2014)... DE (PRWEB) November 26, 2014 ... Heroes recognition reception on December 5, 2014, in San ... meeting. The MPN Heroes event will honor clinicians, caregivers, ... field of myeloproliferative neoplasms (MPNs). , Special guest ... discuss his family's cancer journey at the reception. ...
(Date:11/26/2014)...  Roka Bioscience, Inc. (NASDAQ: ROKA ), a ... the detection of foodborne pathogens, today announced that Paul ... th Annual Healthcare Conference on December 2, 2014 at ... York Palace in New York, NY . ... Company, its operations, strategies and prospects may be discussed. To ...
(Date:11/24/2014)... 2014   First ... Elsevier , a world-leading provider of scientific, ... announce the launch of the latest title in the ... in Food Science . ... a new platform to keep up-to-date with the expanding volume ...
Breaking Biology Technology:Nerium International™ Wins One Platinum, Two Gold MarCom Awards 2CURE Magazine and Incyte to Honor MPN Heroes 2CURE Magazine and Incyte to Honor MPN Heroes 3CURE Magazine and Incyte to Honor MPN Heroes 4Roka Bioscience to Present at the Piper Jaffray Healthcare Conference 2Elsevier Announces Launch of New Journal: Current Opinion in Food Science 2Elsevier Announces Launch of New Journal: Current Opinion in Food Science 3
... and OSLO, March 4 Pharmexa A/S and Affitech ... agreement to merge,the two companies by means of a ... Norwegian company, Affitech AS. The purpose of the merger ... vaccine business,into a company focused on the research and ...
... milestones, - Strong R&D investments, especially in EHT Dx21 and EHT ... Recruitment of 311 samples achieved for EHT Dx21, - ... Expansion of the strategic collaboration with Allergan and extension, ... of a new Management Board, - New positioning of Genomic Services ...
... highlights the importance and challenges of ... America. To move beyond the current crisis, we ... knowledge-intensive jobs, invest in "green" science and engineering ... based industries and workers. , Nanotechnologywhich some scientists ...
Cached Biology Technology:Pharmexa and Affitech to Combine Operations to Create a New Antibody Therapeutics Company 2Pharmexa and Affitech to Combine Operations to Create a New Antibody Therapeutics Company 3ExonHit Therapeutics Invested Strongly in 2008 for Pivotal 2009 Results 2ExonHit Therapeutics Invested Strongly in 2008 for Pivotal 2009 Results 3ExonHit Therapeutics Invested Strongly in 2008 for Pivotal 2009 Results 4ExonHit Therapeutics Invested Strongly in 2008 for Pivotal 2009 Results 5ExonHit Therapeutics Invested Strongly in 2008 for Pivotal 2009 Results 6ExonHit Therapeutics Invested Strongly in 2008 for Pivotal 2009 Results 7ExonHit Therapeutics Invested Strongly in 2008 for Pivotal 2009 Results 8ExonHit Therapeutics Invested Strongly in 2008 for Pivotal 2009 Results 9ExonHit Therapeutics Invested Strongly in 2008 for Pivotal 2009 Results 10ExonHit Therapeutics Invested Strongly in 2008 for Pivotal 2009 Results 11Nanotechnology: Will it drive a new innovation economy for the US? 2Nanotechnology: Will it drive a new innovation economy for the US? 3
IHC detection kit for PCNA in cells and tissues...
... Immunogen: Synthetic peptide derived from the ... protein. Specificity: Reacts with the ... Reactivity: Human Mouse (positive controls: WNT1-transfected ... lysates and mouse Mouse-1 cell lysates). ...
The pYES2 vector is designed for native expression of your protein of interest in S. cerevisiae. It contains the URA3 gene for selection in yeast and 2 origin for high-copy maintenance....
... cAMP - [125I] Direct SPA ... SPA.Includes lysis reagents that eliminate lengthy ... cAMP measurement (optional use).Range: 1.32-84.28 ng/ml ... pmol/ml).Overnight protocol.Store at 2-8 C. Category: ...
Biology Products: