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:4/2/2015)... , April 2, 2015 ... tests DERMALOG by far outperforms the strongest competitors, ... maintaining high accuracy, the system is capable of ... the speed proves up to be ten times ... than its runner-up performance.      (Photo: ...
(Date:4/2/2015)... According to preliminary estimates Fingerprint ... higher than 125 MSEK. This exceeds the guidance provided ... revenues for Q1 2015 would be in line with ... 2014. The operating result for the first quarter is ... report will as previously communicated be published on May ...
(Date:4/1/2015)... Apr. 1, 2015  NXT-ID, Inc. (NASDAQ: NXTD ... focused on the growing mobile commerce market, announces the ... wallets is underway to early access pre-order customers. ... usage at retail outlets including Walmart, Target, AT&T, Dunkin, ... Wocket was accepted at all outlets and very easy ...
Breaking Biology News(10 mins):DERMALOG AFIS Emerges as Performance Winner in NIST Benchmark Test 2DERMALOG AFIS Emerges as Performance Winner in NIST Benchmark Test 3Fingerprint Cards Revises Revenues for Q1 2015 2NXT-ID Reports Second Shipment of Wocket Smart Wallets Underway to Early Access Pre-order Customers and Provides User Feedback 2NXT-ID Reports Second Shipment of Wocket Smart Wallets Underway to Early Access Pre-order Customers and Provides User Feedback 3NXT-ID Reports Second Shipment of Wocket Smart Wallets Underway to Early Access Pre-order Customers and Provides User Feedback 4
... in which babies are born can have a dramatic ... That is the conclusion of a new study published ... Neuroscience . The experiment provides the first evidence for ... conducted by Professor of Biological Sciences Douglas McMahon, graduate ...
... for the first time that exactly how we see our environment ... We are all familiar with the idea that our thoughts ... assume that how we perceive the visual world is usually very ... the area at the back of the brain responsible for processing ...
... reversed by activating stem cells that can repair injury in ... from the Universities of Cambridge and Edinburgh have identified a ... sheaths that protect nerve fibres in the brain. ... can be exploited to make the brain,s own stem cells ...
Cached Biology News:Babies' biological clocks dramatically affected by birth light cycle 2Babies' biological clocks dramatically affected by birth light cycle 3Babies' biological clocks dramatically affected by birth light cycle 4Babies' biological clocks dramatically affected by birth light cycle 5Seeing the world differently 2Study reveals new possibility of reversing damage caused by MS 2
(Date:4/20/2015)... Sinovac Biotech Ltd. (Nasdaq: SVA), a leading provider of ... results for the fourth quarter and full year ended ... Highlights(Compared to the fourth quarter 2013) , Quarterly ... from $22.9 million in the prior year period. Excluding ... vaccine of $0.1 million in the fourth quarter of ...
(Date:4/17/2015)... 17, 2015  Centrillion Technologies, a genomic ... from the National Human Genome Research Institute, ... (NIH). The grant will help fund the ... of breakthrough genomic technologies, including phased sequencing ... Centrillion has been developing this transformative and ...
(Date:4/17/2015)... -- US-Australian drug discovery company, Novogen, today announced that ... the Feinstein Institute for Medical Research (,Feinstein Institute,) ... collaborate with the objective of developing effective treatments ... together the drug discovery expertise of Novogen and ... Institute in neurosciences and oncology. At ...
(Date:4/16/2015)... OSAKA, Japan , April 16, 2015 ... of Kyoto University and Takeda Pharmaceutical Company Limited ... to develop clinical applications of induced pluripotent stem ... mellitus, neurological disorders and cancer immunotherapy. The "Takeda-CiRA ... designed to expedite multiple research projects for drug ...
Breaking Biology Technology:Sinovac Reports Unaudited Fourth Quarter and Full Year 2014 Financial Results 2Sinovac Reports Unaudited Fourth Quarter and Full Year 2014 Financial Results 3Sinovac Reports Unaudited Fourth Quarter and Full Year 2014 Financial Results 4Sinovac Reports Unaudited Fourth Quarter and Full Year 2014 Financial Results 5Sinovac Reports Unaudited Fourth Quarter and Full Year 2014 Financial Results 6Sinovac Reports Unaudited Fourth Quarter and Full Year 2014 Financial Results 7Sinovac Reports Unaudited Fourth Quarter and Full Year 2014 Financial Results 8Sinovac Reports Unaudited Fourth Quarter and Full Year 2014 Financial Results 9Sinovac Reports Unaudited Fourth Quarter and Full Year 2014 Financial Results 10Sinovac Reports Unaudited Fourth Quarter and Full Year 2014 Financial Results 11Sinovac Reports Unaudited Fourth Quarter and Full Year 2014 Financial Results 12Sinovac Reports Unaudited Fourth Quarter and Full Year 2014 Financial Results 13Sinovac Reports Unaudited Fourth Quarter and Full Year 2014 Financial Results 14Sinovac Reports Unaudited Fourth Quarter and Full Year 2014 Financial Results 15Sinovac Reports Unaudited Fourth Quarter and Full Year 2014 Financial Results 16Sinovac Reports Unaudited Fourth Quarter and Full Year 2014 Financial Results 17Sinovac Reports Unaudited Fourth Quarter and Full Year 2014 Financial Results 18Novogen and Feinstein Institute Join Forces to Find Effective Treatments for Brain Cancer 2Novogen and Feinstein Institute Join Forces to Find Effective Treatments for Brain Cancer 3Novogen and Feinstein Institute Join Forces to Find Effective Treatments for Brain Cancer 4Novogen and Feinstein Institute Join Forces to Find Effective Treatments for Brain Cancer 5Novogen and Feinstein Institute Join Forces to Find Effective Treatments for Brain Cancer 6CiRA and Takeda Enter 10-year Collaboration on iPS Cell Research 2CiRA and Takeda Enter 10-year Collaboration on iPS Cell Research 3
... are not teaching skills needed for the Information Age. Their ... that we are way beyond the Industrial Age. , ... Rs. I am not talking about reading, writing and `rithmetic; ... these add up to regimentation, which is what was needed ...
... CleanTech Partners will receive $1.5 million from the ... attempt to produce cellulosic ethanol at paper mills by extracting ... paper making. , ,Masood Akhtar, president of CleanTech Partners and ... for the grant. Other participants included the United ...
... Wis. - The origins of Madison's technology industry can ... pretty isolated when he opened DNASTAR, Inc . that year. ... Promega - and a few more, the producer of DNA ... an era where it was considered bad form - even a ...
Cached Biology Technology:Rote education fails the Information Age 2Rote education fails the Information Age 3Rote education fails the Information Age 4DNASTAR catches second wave of sequencing 2DNASTAR catches second wave of sequencing 3DNASTAR catches second wave of sequencing 4
Each 72-well MiniTray is low profile, with lid. Conical well shape, 10 l....
... Clone/PAD: ZMD.283. Immunogen: Fusion protein ... Specific for ASIP/PAR-3 (atypical PKC isotype-specific ... antigen is not related to the ... Human Dog Xenopus (positive controls: Caco-2 ...
For use with SSP products or any application requiring agarose gel separation • Multiple formats available to meet various throughput needs • Includes replacement parts for each un...
Request Info...
Biology Products: