Navigation Links
The winners of mass extinction: With predators gone, prey thrives
Date:5/3/2011

of dominance had left the crinoids especially vulnerable to a new predator strategy. In the Devonian era, crinoids evolved hard armored shells to defend against fish with sharp "shearing" teeth. But when fish populations returned in force 15 million years after the Hangenberg event, those species used "crushing" teeth well suited for thwarting crinoid defenses.

The persistence of a once-beneficial trait that becomes obsolete should be called a "legacy adaptation," the authors propose. In the absence of a predator-prey arms race, a species' inherited defenses may become outdated, Sallan said.

"There's a complete absence of predation pressure and the crinoids take off, but they retain their defenses as if they can't get out of them," Sallan said. "When a new form of predator appears, they can go directly for the best solution to cracking a crinoid, which is crushing. The Devonian-era armor of crinoids isn't suited for defending against that attack, but they can't lose it without losing all of their residual defenses."


'/>"/>

Contact: Robert Mitchum
robert.mitchum@uchospitals.edu
773-795-5227
University of Chicago Medical Center
Source:Eurekalert  

Page: 1 2 3

Related biology news :

1. ASPO announces 2011 award winners in pediatric otolaryngology research
2. Biophysical Society announces 2011 Student Research Achievement award winners
3. Evolutionary winners and losers revealed in collaborative study
4. Winners to share $1 million prize in Office of Naval Research challenge
5. Filmmakers Joel and Ethan Coen among 2011 Dan David Prize winners
6. Joshua E. Neimark Memorial Travel Assistance Award winners investigate stem cell transplantation, sustainable growth, women in academia, and conservation science
7. BTER Foundation announces winners of the William S. Baer Award
8. American Association of Anatomists announces young investigator award winners
9. Biophysical Society announces winners of 2011 Student Travel Awards
10. Biophysical Society announces winners of 2011 CPOW Travel Awards
11. Biophysical Society announces winners of 2011 International Travel Awards
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
The winners of mass extinction: With predators gone, prey thrives
(Date:12/17/2014)... 16, 2014  Automation is fundamentally transforming the ... than at international borders. Over the past decade, ... allowed veteran travelers to self process through border ... Kiosks at an increasing number of airports, seaports, ... According to Maxine Most , Principal ...
(Date:12/11/2014)... WINSTON SALEM, N.C. , Dec. 10, 2014  That ... known for quite a while. Hypertension – the medical term ... disease in the early 1800s, and the inflatable cuff that,s ... That doesn,t, however, mean there,s nothing new about hypertension, ... punctured some long-held beliefs about the condition and the best ...
(Date:12/10/2014)... , Dec. 9, 2014  Wake Forest Baptist Medical ... building for its School of Medicine. Funding for this ... capital campaign that will be publicly launched next summer. ... located in the former 60 series R.J. Reynolds Tobacco ... Quarter. Construction will begin immediately with plans to be ...
Breaking Biology News(10 mins):Automated Border Control (ABC) Transforms the Global Travel Experience With More Than 2500 ABC eGates and APC Kiosks Deployed In Airports, Seaports, and Land Borders Worldwide 2Research points to need for new approaches to treatment of high blood pressure 2Research points to need for new approaches to treatment of high blood pressure 3Research points to need for new approaches to treatment of high blood pressure 4Wake Forest Baptist to Build New Medical Education Facility In Wake Forest Innovation Quarter 2Wake Forest Baptist to Build New Medical Education Facility In Wake Forest Innovation Quarter 3Wake Forest Baptist to Build New Medical Education Facility In Wake Forest Innovation Quarter 4
... The presentation ceremony in this inaugural edition ... will take place on Thursday, June 18, under ... and Innovation, Cristina Garmendia, and the BBVA Foundation ... will include leading representatives from the international scientific ...
... in representing natural climate archives. For the temperate ... annual rings depend mainly on temperature and precipitation. ... the correlation is not so evident. Now scientists ... their colleagues of the Australian National University have been ...
... Caribou and reindeer numbers worldwide have plunged almost 60% ... came out of the first ever comprehensive census analysis ... the University of Alberta. The results have recently ... Biology Journal and co-author PhD student Liv Vors ...
Cached Biology News:The BBVA Foundation presents its Frontiers of Knowledge Awards 2Australia's climate: Drought and flooding in annual rings of tropical trees 2
(Date:12/19/2014)... Reports from CDC show ... from one or more chronic health conditions - including ... address some of these diseases, but may not eliminate ... face. While implanted nerve stimulation devices today offer relief, ... which can induce side effects. , To eliminate ...
(Date:12/19/2014)... -- Decision Resources Group finds that the Asia ... through 2023 as the aging population, increasing adoption of ... all spur procedure volumes. Growth will be particularly rapid ... and India , where rising ... a larger proportion of the population. Other ...
(Date:12/17/2014)... Based on the revenues gained from ... is dominated by four major players contributing to ... players include GE Healthcare (U.K.), Siemens AG (Germany), ... Full Report Copy at http://www.marketsandmarkets.com/Market-Reports/surgical-imaging-market-210534462.html , ... attributed to its strong product portfolio, which includes ...
(Date:12/17/2014)... This report is a professional ... For an overview analysis, the report introduces quartz ... structure, industry overview, policy analysis, and news analysis, ... has witnessed rapid development with key manufacturers increasing ... report mentions quartz tubing upstream raw materials and ...
Breaking Biology Technology:Draper Wins GSK Funding for Smaller, Smarter Implantable Devices 2Asia Pacific Dental Biomaterial Market Will Grow Strongly Through 2023 2Asia Pacific Dental Biomaterial Market Will Grow Strongly Through 2023 3Global Refurbished Surgical Imaging Market by Product & Application is Estimated to Reach $1.25 Billion by 2019 - New Research Report by MarketsandMarkets 2Global Refurbished Surgical Imaging Market by Product & Application is Estimated to Reach $1.25 Billion by 2019 - New Research Report by MarketsandMarkets 3Global Refurbished Surgical Imaging Market by Product & Application is Estimated to Reach $1.25 Billion by 2019 - New Research Report by MarketsandMarkets 42020 Quartz Tubing Market: Global Development & Forecasts Analysis Now at DeepResearchReports.com 2
... PALM BEACH, Fla., Jan. 3, 2012  The secret to the ... yard. Sponsored by Dr. Kenneth Beer, M.D. and Mrs. Kathy ... growth experts from The University of Pennsylvania School of Medicine ... January 29, 2012, residents of South Florida will have an ...
... 3, 2012  SuperNova Diagnostics®, Inc., a privately-held global diagnostics ... Neil J. Campbell, President and CEO, will present a ... San Francisco, CA.  Mr. Campbell,s presentation is scheduled for ... Room at the Parc 55 Wyndham Union Square Hotel. ...
... Jan. 3, 2012 Neogen Corporation has developed a new test ... lateral flow test with the fully quantitative precision of a more ... certain grains is a major concern to producers of animal feed ... for DON delivers precise results ranging from 0.3 to 6 parts ...
Cached Biology Technology:Palm Beach Residents to Learn How the Future of Regenerative Medicine Will Combat Aging 2SuperNova Diagnostics® to Present at Biotech Showcase™ 2012 During JP Morgan Healthcare Conference January 9 - 12 2Neogen Launches Fully Quantitative Lateral Flow Test for DON 2
... cap mat made from an inert polymer with ... 384 split septum caps for use ... Suitable for PCR when used in conjunction with ... Pierceable with standard pipetting equipment 384 septum ...
Packaging: package with 500 l Patent/trademark/license (electronic): (r) Registered trademark of Molecular Probes...
... Buffer is a unique alternative to ... (TRIS acetate-EDTA) electrophoresis buffers. Bionic Buffer ... rapid running times, and high-resolution band ... gel electrophoresis after dilution to working ...
... and easy method for the isolation ... mammalian tissues. Most of the isolated ... membranes. The kit contains extraction buffers ... profiling. Also included is a storage ...
Biology Products: