Navigation Links
Dinosaurs with killer claws yield new theory about flight
Date:12/14/2011

er prey."

The study also has implications for the next closest relatives of troodontids and dromaeosaurids: birds. An important step in the origin of modern birds was the evolution of the perching foot.

"A grasping foot is present in the closest relatives of birds, but also in the earliest birds like Archaeopteryx," Fowler said. "We suggest that this originally evolved for predation, but would also have been available for use in perching. This is what we call 'exaptation:' a structure evolved originally for one purpose that can later be appropriated for a different use."

The new study proposes that a similar mechanism may be responsible for the evolution of flight.

"When a modern hawk has latched its enlarged claws into its prey, it can no longer use the feet for stabilization and positioning," Fowler said. "Instead the predator flaps its wings so that the prey stays underneath its feet, where it can be pinned down by the predator's bodyweight."

The researchers suggest that this 'stability flapping' uses less energy than flight, making it an intermediate flapping behavior that may be key to understanding how flight evolved.

"The predator's flapping just maintains its position, and does not need to be as powerful or vigorous as full flight would require. Get on top, stay on top; it's not trying to fly away," Fowler said. "We see fully formed wings in exquisitely preserved dromaeosaurid fossils, and from biomechanical studies we can show that they were also able to perform a rudimentary flapping stroke. Most researchers think that they weren't powerful enough to fly; we propose that the less demanding stability flapping would be a viable use for such a wing, and this behavior would be consistent with the unusual adaptations of the feet."

Another group of researchers has proposed that understanding flapping behaviors is key to understanding the evolution of flight, a view with which Fowler agrees.<
'/>"/>

Contact: Evelyn Boswell
evelynb@montana.edu
406-994-5135
Montana State University
Source:Eurekalert

Page: 1 2 3 4

Related biology news :

1. Skin bones helped large dinosaurs survive, new study says
2. Paleontologist describes large nest of juvenile dinosaurs, first of their genus ever found
3. Tree resin captures evolution of feathers on dinosaurs and birds
4. New Montana State research sheds light on South Pole dinosaurs
5. Jurassic Park had it right: Some dinosaurs hunted by night
6. Living dinosaurs: The evolutionary history of modern birds
7. Test shows dinosaurs survived mass extinction by 700,000 years
8. EARTH: How dinosaurs arose
9. Oldest evidence of dinosaurs found in Polish footprints
10. New fossil suggests dinosaurs not so fierce after all
11. New species of multi-horned dinosaurs unearthed in Utah
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:12/19/2014)... --  LaunchKey , the first decentralized mobile authentication and ... Things era, today announced the close of $3 million ... by Metamorphic Ventures with participation from ENIAC Ventures, Crosslink ... LaunchKey has raised $4 million to date, and will ... bring LaunchKey to market in 2015. LaunchKey ...
(Date:12/17/2014)... Va. , Dec. 15, 2014 ... to make it easier to detect and prevent ... Today the agency started performing an ... capability will validate the authenticity of purchased microcircuits ... The new quality control measures will be conducted ...
(Date:12/17/2014)... 2014 Valencell, a leader in performance biometric ... to industry leaders such as Intel, Jabra, Atlas, and ... wearable products. These products will be showcased at CES ... Vegas . "Our partners choose ... robust – with the clinical data to back it ...
Breaking Biology News(10 mins):LaunchKey Raises $3 Million in Additional Funding Led by Metamorphic Ventures 2LaunchKey Raises $3 Million in Additional Funding Led by Metamorphic Ventures 3Defense Logistics Agency Launches DNA Marking Capability to Strengthen Microcircuit Supply Chain 2Defense Logistics Agency Launches DNA Marking Capability to Strengthen Microcircuit Supply Chain 3Valencell PerformTek Biometrics Power the Most Accurate Wearables at CES 2015 2
... mesothelioma ?a form of cancer associated with asbestos exposure ?have ... two cancer drugs, a large multicenter study finds. , Mesothelioma, ... the lining of the lungs, heart and abdomen, is associated ... , In the study, patients receiving pemetrexed and cisplatin ?along ...
... virus (IBV) causes losses of £23.6M a year to the ... way to vaccinate chicks against the disease ?one that can ... , A pre-hatching prototype vaccine virus which provides immunity to ... Animal Health (IAH) and vaccine company Intervet UK. It can ...
... may be simpler than what scientists had been assuming. A ... Journal of Biological Chemistry, provides new information on the inner ... the way physicians make livers regrow in patients with liver ... human liver is one of the few organs in the ...
Cached Biology News:Chemo combination improves survival in asbestos-related cancer 2Chemo combination improves survival in asbestos-related cancer 3In-shell vaccine for chick disease 2Liver regeneration may be simpler than previously thought 2Liver regeneration may be simpler than previously thought 3
(Date:12/19/2014)... ISN has released its third annual U.S. ... series. With data aggregated from over eight billion U.S. ... online contractor management platform, ISNetworld, this three-part series provides ... The Contractor Performance Benchmarking ... in two industry specific volumes: Oil & Gas, ...
(Date:12/17/2014)... 17, 2014 Achim Noack has been ... Stoller Group. In this position, Noack will assist Jerry ... matters, develop marketing strategy and supervise global marketing management ... “Achim has tremendous knowledge and experience in the crop ... “His experience and innovative thinking will be a great ...
(Date:12/17/2014)... CA (PRWEB) December 17, 2014 ... today that it has entered into a technology ... Company (ADM) to apply DNA2.0’s proprietary protein engineering ... engineering process. , “We are extremely excited that ... engineering platform. This proprietary bioengineering technology has ...
(Date:12/17/2014)... Dec. 17, 2014 Tigercat Pharma, Inc. ... study evaluating the investigational oral NK-1 receptor antagonist ... severe, chronic itch who are unresponsive or inadequately ... topical steroids and antihistamines. The ... Analog Scale (VAS) itch score from baseline, comparing ...
Breaking Biology Technology:ISN Releases Third Edition of US Contractor Health & Safety Performance Indicators Publication Series 2ISN Releases Third Edition of US Contractor Health & Safety Performance Indicators Publication Series 3Achim Noack Joins Stoller Group as Global Vice President of Marketing and Administration 2ADM and DNA2.0 Enter Into Protein Engineering Technology Access and Service Agreement 2Velocity Pharmaceutical Development, LLC and Tigercat Pharma, Inc. Announce Phase 2 Results for VPD-737 in Patients With Chronic Pruritus 2Velocity Pharmaceutical Development, LLC and Tigercat Pharma, Inc. Announce Phase 2 Results for VPD-737 in Patients With Chronic Pruritus 3Velocity Pharmaceutical Development, LLC and Tigercat Pharma, Inc. Announce Phase 2 Results for VPD-737 in Patients With Chronic Pruritus 4
... New System to Streamline Process, Drive Value from ... Software Inc., a leading,provider of web-based employee performance ... been selected by Quiznos to provide a system,for ... is a,national chain with over 5000 franchise restaurants, ...
... Alimera Sciences,and pSivida Ltd (Nasdaq: PSDV ... have amended their license and collaboration agreement relating ... for,diabetic macular edema (DME), and other Medidur products. ... of Medidur FA from 50 to 80,percent in ...
... Million Distribution Contract from Anhui ... Huayuan Pharmaceutical Co., ... Co., Inc., (OTC Bulletin Board: TYNP), a manufacturer and,supplier ... today announced that the Company has been granted SFDA,approval ...
Cached Biology Technology:Quiznos Selects Halogen for Fresh Approach to Talent Management 2Alimera Sciences, pSivida Limited Amend Medidur(TM) FA Collaboration Agreement 2Alimera Sciences, pSivida Limited Amend Medidur(TM) FA Collaboration Agreement 3Alimera Sciences, pSivida Limited Amend Medidur(TM) FA Collaboration Agreement 4Tianyin Pharmaceutical Announces SFDA Approval to Market Azithromycin Dispersible Tablets 2Tianyin Pharmaceutical Announces SFDA Approval to Market Azithromycin Dispersible Tablets 3
LTBP-2 (7B10)...
... Mouse monoclonal [198C679.2.1] to Presenilin 2 ... inherited form of the disease carry mutations ... the amyloid precursor protein (APP). These disease-linked ... longer form of amyloid-beta (main component of ...
... Inventory Racks for cryogenic vials. ... cardboard or stainless steel boxes ... cryo vials. Vapor phase ... Platform risers to be ...
Human Glypican 2 Biotinylated Affinity Purified PAb...
Biology Products: