Navigation Links
Study reveals predation-evolution link
Date:9/10/2007

Blacksburg, Va. -- The fossil record seems to indicate that the diversity of marine creatures increased and decreased over hundreds of millions of years in step with predator-prey encounters, Virginia Tech geoscientists report in the Proceedings of the National Academy of Science.

For decades, there has been a debate between paleontologists, biologists, and ecologists on the role of ecological interactions, such as predation, in the long term patterns of animal evolution.

John Warren Huntley, a postdoctoral scientist in the Department of Geosciences at Virginia Tech, and Geosciences Professor Micha Kowalewski decided to look at the importance of ecology by surveying the literature for incidents of predation in marine invertebrates, such as clams and their relatives.

Today, certain predators leave easy to identify marks on the shells of their prey, such as clean, round holes, said Huntley. Such holes drilled by predators can also be found in fossil shells.

The researchers also looked for repair scars on the shells of creatures that survived an attack.

The study was conducted by looking at studies which reported the frequency of drill holes and repair scars in fossil species from the last 550 million years.

First Huntley and Kowalewski found that predation increased notably about 480 million years ago, some 50 million years earlier than previous studies have found. The earlier studies were based on changes in morphology predators with stronger claws and jaws and prey with more ornamented shells. We looked at the frequency of attacks, which increased about 50 million years before the changes in armor, said Huntley.

But the most notable discovery is the observation that the incidence of drill holes and repair scars are strikingly parallel to Sepkoskis diversity curve for marine invertebrates. This diversity curve, compiled by the late Jack Sepkoski of the University of Chicago, records the or
'/>"/>

Contact: Susan Trulove
strulove@vt.edu
540-231-5646
Virginia Tech
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Bioartificial kidney under study at MCG
2. Novel Asthma Study Shows Multiple Genetic Input Required; Single-gene Solution Shot Down
3. W.M. Keck Foundation funds study of friendly microbes
4. Yellowstone microbes fueled by hydrogen, according to U. of Colorado study
5. Emory Study Tests Bone Marrow Stem Cells to Improve Circulation in Legs
6. UCLA Study Shows One-Third of Drug Ads in Medical Journals Do Not Contain References Supporting Medical Claims
7. Study Demonstrates Gene Expression Microarrays are Comparable and Reproducible
8. Study Links Ebola Outbreaks To Animal Carcasses
9. Genome-wide mouse study yields link to human leukemia
10. Breakthrough Microarray-based Technology for the Study of Cancer
11. NYU Study Reveals How Brains Immune System Fights Viral Encephalitis
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:11/5/2014)... great diversity in their ability to identify scents and ... in their perceptual evaluation of odors, with women outperforming ... , Sex differences in olfactory detection may play a ... to one,s perception of smell, which is naturally linked ... has been suggested to be cognitive or emotional, rather ...
(Date:11/4/2014)... Think about the way our bodies are assembled during ... that they are supposed to become a nerve or ... the correct place and alignment? Researchers at the University ... In a new study, UM researchers describe the signaling ... neighbors, at the head-trunk region. Their discovery may have ...
(Date:11/4/2014)... 2014   Neurotechnology , a provider of ... latest version of its fingerprint matching algorithm has ... evaluation organized by NIST. The MINEX test ... INCITS 378 fingerprint standard template format. MINEX compliance ... in the United States ...
Breaking Biology News(10 mins):The female nose always knows: Do women have more olfactory neurons? 2The inside story: How the brain and skull stay together 2Neurotechnology Places Second in Ongoing MINEX Ranking for Fingerprint Matching Algorithms 2Neurotechnology Places Second in Ongoing MINEX Ranking for Fingerprint Matching Algorithms 3
... As thousands of pink-footed geese (Anser brachyrhynchus) prepare ... in the Arctic, ecologists are warning that the ... threatening the birds' survival. Writing in the new ... Applied Ecology, Professor Marcel Klaassen of the Netherlands ...
... Hospital of Pittsburgh have found that increased levels of ... signal brain injury in infants with vomiting, fussiness and ... baby syndrome (SBS) ?the most common cause of severe ... because doctors rarely receive a history that an infant ...
... artificial sweeteners such as saccharin with a sensory ... sweet taste has guided researchers to an increased ... , Reporting in an advance online publication ... Center describe how certain artificial sweeteners, including sodium ...
Cached Biology News:Spring migration of pink-footed geese under threat 2Pittsburgh researchers discover that certain chemicals in the blood may indicate brain injury 2Sweet 'water taste' paradoxically predicts sweet taste inhibitors 2
(Date:11/18/2014)... 18, 2014 Alanda Software, a ... Reporting solutions, announced today that a top tier ... Consummate Provider™ solution in both the U.S. and ... SaaS based, Data Quality remediation portal, designed to ... party Providers improve their ability to capture, transmit ...
(Date:11/18/2014)... Array Architects is proud of a ... the nation's hospitals and health systems. It is a ... their careers to the advancement of both the healthcare ... respective field, Laura Silvoy has been chosen to share ... Simulation Conference. , Laura will present her Process ...
(Date:11/18/2014)...  Novira Therapeutics, Inc., a privately held biopharmaceutical company ... B virus (HBV) infection, today announced that Brian ... Advisory Board (SAB).  "We are thrilled ... S. Schade , Chief Executive Officer of Novira.  "Brian ... be invaluable to Novira as our lead core inhibitor ...
(Date:11/16/2014)... (PRWEB) November 16, 2014 James Hill ... With Filtered Fume Hoods, 3 Years Later” scheduled for ... fall of 2011, Butler University surprised many in the ... in their organic chemistry and general chemistry teaching laboratories ... due to building age and substantial growth within the ...
Breaking Biology Technology:Alanda Software Completes Successful Implementation of Global Data Quality & Vendor Management Solution for Top Tier Global Biopharmaceutical Company 2Array Healthcare Simulation Expert Slated to Speak at Winter Simulation Conference 2Novira Therapeutics Announces Appointment of Brian F. Daniels, M.D., to its Scientific Advisory Board 2Novira Therapeutics Announces Appointment of Brian F. Daniels, M.D., to its Scientific Advisory Board 3Don't miss the I2SL High-Tech Talks Webinar Series Presenting: Butler University's Renovation With Filtered Fume Hoods, 3 Years Later 2Don't miss the I2SL High-Tech Talks Webinar Series Presenting: Butler University's Renovation With Filtered Fume Hoods, 3 Years Later 3
... , ... SmithKline Beecham Pharmaceuticals, UK , ... FlashPlate is a 96-well white polystyrene microplate with scintillant-coated wells designed ... as a platform for the measurement of G-protein activation by means of ...
... L. Smith1, M.J. Price-Jones 1 , K.T. Hughes 1 ... Whitchurch, Cardiff, CF4 7YT, Wales, UK, 2 PerkinElmer Life Sciences, P.O.Box ... , INTRODUCTION , ... designed for liquid scintillation (LS) or luminescence detection of samples in microtitration plates, ...
... , Thomas Wampler , ... Limestone Road , Oxford, PA 19363-0277 , ... The use of analytical pyrolysis 1 with gas chromatography/ mass spectrometry (GC/MS) ... these large molecules behave at elevated temperatures. The utility of the technique is based on ...
Cached Biology Technology:Use of FlashPlate Technology for In Vitro Measurement of [35S]-GTPγS Binding in CHO Cells Expressing the Human 5-HT1B Receptor 2Use of FlashPlate Technology for In Vitro Measurement of [35S]-GTPγS Binding in CHO Cells Expressing the Human 5-HT1B Receptor 3Use of FlashPlate Technology for In Vitro Measurement of [35S]-GTPγS Binding in CHO Cells Expressing the Human 5-HT1B Receptor 4Use of FlashPlate Technology for In Vitro Measurement of [35S]-GTPγS Binding in CHO Cells Expressing the Human 5-HT1B Receptor 5Counting Cytostar-T scintillating microplates on the MicroBeta JET 2Counting Cytostar-T scintillating microplates on the MicroBeta JET 3Counting Cytostar-T scintillating microplates on the MicroBeta JET 4Counting Cytostar-T scintillating microplates on the MicroBeta JET 5Polymer Degradation Mechanisms Encountered in Pyrolysis-GC/MS 2Polymer Degradation Mechanisms Encountered in Pyrolysis-GC/MS 3Polymer Degradation Mechanisms Encountered in Pyrolysis-GC/MS 4
... 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 ...
... 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 ...
The Mu-End™ Protein Truncation Kit provides a convenient method for generating a library of N-terminal and C-terminal protein deletions that can be expressed in E. coli....
... Mouse Cytokine Array is a multiplex sandwich ... measurement of 12 cytokines in serum; EDTA, ... Each well of the microplate provided is ... in standards and samples added to the ...
Biology Products: