Navigation Links
Black piranha, megapiranha have most powerful bites of fish living or extinct, finds GW researcher
Date:12/20/2012

WASHINGTON The black piranha and the extinct giant piranha, or megapiranha, have the most powerful bites of carnivorous fishes, living or extinct, once body size is taken into account, finds researchers in a paper recently published in Scientific Reports. The research paper, Mega-Bites: Extreme jaw forces of living and extinct piranhas, highlights the piranhas' specialized jaw morphology, which allows them to attack and bite chunks out of much larger prey.

Guillermo Ort, the George Washington University Louis Weintraub Professor of Biology in the Columbian College of Arts and Sciences, is one of the authors of the paper. His research focuses on the evolution of fishes in general, but specializes on Amazonian fishes, to unravel evolutionary relationships based on DNA sequence data. In 2010, Dr. Orti along with other researchers participated in an expedition to the Xingu and Iriri rivers in Amazonia to collect the data on the fish.

Piranhas' aggressive nature, relatively small size and accessible populations make them a suitable group of predatory vertebrates in which to study the evolution of extreme biting capabilities. Even at their small body sizes, diet studies indicate that piranhas will attack and bite chunks of bony fins and flesh from prey many times larger than themselves. In spite of their reputation, no quantitative data or empirical estimates regarding the piranhas biting abilities were available.

The paper reports the first bite-force measurements taken from wild specimens of the largest species of carnivorous piranha in the Amazon, the black piranha, and describes the underlying functional morphology of the jaws that allows this creature to bite with a force more than 30 times greater than its weight. The powerful bite is achieved primarily due to the large muscle mass of the black piranha's jaw and the efficient transmission of its large contractile forces through a highly modified jaw-closing lever.

The ex
'/>"/>

Contact: Latarsha Gatlin
lgatlin@gwu.edu
202-994-5631
George Washington University
Source:Eurekalert  

Page: 1 2

Related biology news :

1. Black flies may have a purpose after all
2. Wiley-Blackwell launches new open-access journal: Food Science & Nutrition
3. Black brant geese show lifetime relationship good for goose and gander
4. Are brown widows displacing black widow spiders around southern California homes?
5. Sickle cell trait can cause sudden cardiac death in black athletes: Why is this controversial?
6. Unusual weather events identified during the Black Saturday bushfires
7. Black belts white matter shows how a powerful punch comes from the brain
8. Human impact felt on Black Sea long before industrial era
9. Scientists find aphid resistance in black raspberry
10. Lack of vitamin D contributes to pain in black Americans with knee osteoarthritis
11. Le Rouge et le Noir: Where the black dahlia gets its color
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Black piranha, megapiranha have most powerful bites of fish living or extinct, finds GW researcher
(Date:4/17/2014)... recent Yokahama IPCC meeting painted a stark warning on ... which has a greenhouse effect 32 times that of ... shown that humic substances act as fully regenerable electron ... are held in wetlands instead of being released to ... system is disrupted it may enter into a vicious ...
(Date:4/17/2014)... the genetic information of DNA is used to ... numerous different functions in living organisms. Messenger RNA ... expression, by relating the genetic information of DNA ... , By examining the different types and ... at a given time, researchers can determine which ...
(Date:4/17/2014)... uncovered a new way the immune system may fight ... to use immune cells to treat illness. , The ... immunological equivalent of "neighborhood police" specialized squads of ... instead of an entire city, the body. , Scientists ... have shown that the liver, skin and uterus each ...
Breaking Biology News(10 mins):Methane climate change risk suggested by proof of redox cycling of humic substances 2Rapid and accurate mRNA detection in plant tissues 2Some immune cells defend only 1 organ 2
... presented the 2013 Gustav O. Lienhard Award to Steven ... have helped save millions from premature, smoking-related deaths. ... as well as his work to improve end-of-life care. ... award to a dedicated champion of health for Americans ...
... -- Carnegie Mellon University President Subra Suresh has been ... making him the only current university president to be ... National Academy is among the highest professional distinctions accorded ... membership honors those who have made outstanding contributions to ...
... WASHINGTON -- The Institute of Medicine of the National Academies ... Clayton for their outstanding service today at the IOM,s 43rd ... Medal, awarded to an IOM member for distinguished service over ... on the Quality of Health Care in America, which produced ...
Cached Biology News:Leader of smoking cessation and tobacco prevention efforts receives Institute of Medicine's 2013 Lienhard Award 2Leader of smoking cessation and tobacco prevention efforts receives Institute of Medicine's 2013 Lienhard Award 3Leader of smoking cessation and tobacco prevention efforts receives Institute of Medicine's 2013 Lienhard Award 4Carnegie Mellon President Subra Suresh elected to Institute of Medicine 2Institute of Medicine honors members for outstanding service 2Institute of Medicine honors members for outstanding service 3
(Date:1/15/2014)... Toronto, ON (PRWEB) January 15, 2014 ... an experimental new therapy for the treatment of tinnitus. ... unique tinnitus frequency, and over a period of weeks to ... Notched Sound Therapy in two forms: Notched Music and Notched ...
(Date:1/14/2014)... January 14, 2014 Date: Friday, April 11, ... Warrington Country Club, 1360 Almshouse Road, Warrington, Pa. ... organization solely dedicated to finding a cure for hepatitis B ... will host its annual Crystal Ball on Friday, April 11 ...
(Date:1/14/2014)... San Diego, CA (PRWEB) January 14, 2014 ... based on the products of cells grown under simulated ... an international license agreement with Suneva Medical, Inc. for ... media (CCM). , This agreement is an ...
(Date:1/14/2014)... , Jan. 14, 2014 As pet owners drew up their ... of them wrote: "Take better care of my furry companion." Nowadays ... clothes and top-brand carrying cases to take the little canine or ... also feel compelled to buy some pricey toys at the pet ...
Breaking Biology Technology:Hepatitis B Foundation to Host Annual Crystal Ball Gala 2Histogen and Suneva Medical Expand License for Cell Conditioned Media-based Aesthetic Products Internationally 2Histogen and Suneva Medical Expand License for Cell Conditioned Media-based Aesthetic Products Internationally 3New Year's Resolution: Give Pets the Gift of Top-Notch Health Care 2
... SAN DIEGO, April 9, 2012 ADVENTRX Pharmaceuticals, Inc. ... establishment of a Regulatory Advisory Board (RAB). The RAB ... Company management in its interactions with the U.S. Food ... JD, who is rendering legal advice to Company management, ...
... wholly owned subsidiary of British company Innovative Carbon Limited today ... 10th April to 13th. , Graphene, a sheet of carbon ... wonder material. First isolated at Manchester University in 2004, ... race has been on to produce it commercially. To ...
... 2012  Albright Stonebridge Group (ASG), a global strategy ... senior advisors – Hakan Akbas, Steven Bipes, Brian ... leading ASG,s commercial activities and advising clients on ... clients of ASG,s Brazil practice as they look ...
Cached Biology Technology:ADVENTRX Announces Establishment of Regulatory Advisory Board 2ADVENTRX Announces Establishment of Regulatory Advisory Board 3ADVENTRX Announces Establishment of Regulatory Advisory Board 4ADVENTRX Announces Establishment of Regulatory Advisory Board 5ADVENTRX Announces Establishment of Regulatory Advisory Board 6UK company to demonstrate their commercially effective graphene production process 2Experts Strengthen Albright Stonebridge Group's Global Reach 2Experts Strengthen Albright Stonebridge Group's Global Reach 3
... Development, Pharmaceutical Development, Physician Owned Labs, Drugs of Abuse, and Industrial Testing applications. Analyzer ... ... ... ...
... OS X provides the most highly integrated ... analysis and molecular biology data management available ... Suite you can store manage view analyze ... molecular biology data all within one integrated ...
... determinations for petroleum-based applications. Multiple solvents can be used, such as water, benzene, formamide, nitrobenzene, ... ... ... ...
rat Leptin...
Biology Products: