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 In the absence of a predator-prey arms race, a species' inherited defenses may become outdated, Sallan said.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:9/12/2014)... Melbourne researchers have discovered that cartilage plays an ... joints seen in rheumatoid arthritis, rather than being ... Tommy Liu, Professor Ian Wicks, Dr Kate Lawler, ... and Eliza Hall Institute made the discovery while ... controlling inflammation during rheumatoid arthritis. The study was ...
(Date:9/12/2014)... Washington , September 12, 2014 ... source covering leading sectors including biometrics and mobile tech, issues ... launch of Apple Pay, its new payment service. ... founder of the Secure Identity and Biometrics Association (SIBA) and ... NXTD ) a company that is introducing its own ...
(Date:9/11/2014)... deadly legacy of DDT, American peregrine falcons ( Falco ... biologists proposed to stop rearing young birds in captivity ... Doug Bell published models that year in ESA,s journal ... for the falcon in California, with and without direct ... that the birds would continue to recover without captive ...
Breaking Biology News(10 mins):No innocent bystander: Cartilage contributes to arthritis 2Biometric Experts Comment on Launch of Apple Pay Smart Wallet Payment Service 2Biometric Experts Comment on Launch of Apple Pay Smart Wallet Payment Service 3Biometric Experts Comment on Launch of Apple Pay Smart Wallet Payment Service 4Biometric Experts Comment on Launch of Apple Pay Smart Wallet Payment Service 5Volunteer 'eyes on the skies' track peregrine falcon recovery in California 2Volunteer 'eyes on the skies' track peregrine falcon recovery in California 3Volunteer 'eyes on the skies' track peregrine falcon recovery in California 4Volunteer 'eyes on the skies' track peregrine falcon recovery in California 5
... in the fruitfly genome, Johns Hopkins scientists have identified those ... captured a global view of all the genes turned on ... to be published April 3 in Developmental Cell, has implications ... move similarly to spread beyond an original tumor, which are ...
... Italy and Virginia Tech in the United States have ... for the production xanthurenic acid (XA) in Anopheles gambiae, ... in the sexual reproduction of the malaria parasite (Plasmodium ... of XA could be an avenue for development of ...
... from a new, five-year study show that regular use of ... cancer by up to 71 percent and may offer similar ... , The study findings were released today at the ... Washington, D.C. , "We believe this is the first ...
Cached Biology News:Researchers identify genes in fruitflies that may shed light on human cancer spread 2Oxidation defense in mosquitoes benefits malaria parasite 2COX-2 inhibitors significantly reduce risk of cancer 2
(Date:9/11/2014)... Until recently, pets suffering from arthritic ailments ... their pain. Pill therapies are costly, can be harmful ... , The procedure uses adult (not embryonic) animal ... regenerative healing power. MediVet's equipment enable veterinarians to remove ... stem cells, then activate and inject the cells into ...
(Date:9/11/2014)... 11, 2014  Ikonopedia will showcase its new ... imaging reporting modules here at the Intensive Breast ... Ikonopedia,s revolutionary suite of report generation software tools ... they look like rather than what they are ... reporting efficiency, and optimize facility operations.  ...
(Date:9/11/2014)... Florida (PRWEB) September 11, 2014 Central ... to announce his partnerships with several Brevard County animal ... Dr. Christiansen has been working in the area since ... small animals since 2008, and is happy to now ... the years Dr. Christiansen has used stem cell therapy ...
(Date:9/10/2014)... Jersey (PRWEB) September 11, 2014 ... its annual Innovations in Dermatological Sciences conference Oct. ... focus on how the university, industry and government ... into clinical use. , This conference is unique ... with cross-sector collaboration, to share their successes, best-practices, ...
Breaking Biology Technology:MediVet America Secures Exclusive Worldwide License with Nanofiber Veterinary 2Ikonopedia Showcases New MQSA Management System and Reporting Modules at Intensive Breast Ultrasound Meeting 2Ikonopedia Showcases New MQSA Management System and Reporting Modules at Intensive Breast Ultrasound Meeting 3Dr. Jeff Christiansen is Now Offering Stem Cell Therapy for Pets at Five Brevard County Animal Hospitals and Beyond 2Dr. Jeff Christiansen is Now Offering Stem Cell Therapy for Pets at Five Brevard County Animal Hospitals and Beyond 3Innovations in Dermatological Sciences 2014 2Innovations in Dermatological Sciences 2014 3
... Five exceptional oncology nurses out of nearly 2,400 ... | US Oncology for their dedication to their ... Oncology Nursing Award honors those nurses in the United ... determination in providing the highest quality oncology nursing care to ...
... 22, 2011 The founders of Oncobiologics, Inc. today ... services, will launch itself to the biopharmaceutical industry at ... held June 27-30 at the Walter E. Washington Convention ... by a group of leading scientists and engineers from ...
... features below 100 nanometres have numerous applications ranging ... Tecnalia participates in a intragated FP7 European Project ... on nanoimprinting techniques (NIL), as a core aspect ... benefits followed are cost reduction, simpler fabrication process ...
Cached Biology Technology:McKesson Specialty Care Solutions | US Oncology Honors Five Exceptional Oncology Nurses for Outstanding Work 2McKesson Specialty Care Solutions | US Oncology Honors Five Exceptional Oncology Nurses for Outstanding Work 3McKesson Specialty Care Solutions | US Oncology Honors Five Exceptional Oncology Nurses for Outstanding Work 4Oncobiologics, Inc. to Unveil New Biologics Proof-of-Concept Engine at BIO International Convention 2
Anti-Indolamine (Indoleamine) 2,3-dioxygenase Immunogen: Recombinant human IDO. Available Date: 38454...
Anti-Ephrin B1 Host: rabbit polyclonal Species Reactivity: human Applications: WB Storage: 4C...
Human Regulatory T cell Staining Kit #2 (w/ APC Foxp3 PCH101, FITC CD4, PE CD25)...
...
Biology Products: