Navigation Links
Mystery of bat with an extraordinary nose solved
Date:7/7/2009

Blacksburg, Va. A research paper co-written by a Virginia Tech faculty member explains a 60-year mystery behind a rare bat's nose that is unusually large for its species. The findings soon will be published in the scientific trade journal, Physical Review Letters.

The article, "Acoustic effects accurately predict an extreme case of biological morphology," by Z. Zhang, R. Mller, and S.N. Truong, details the adult Bourret's horseshoe bat (known scientifically as the "Rhinolophus paradoxolophus," meaning paradoxical crest), and it's roughly 9 millimeters in length nose. The typical horseshoe bat's nose is half that long, said Rolf Mueller, an associate professor with the Virginia Tech mechanical engineering department and director for the Bio-inspired Technology (BIT) Laboratory in Danville, Va. "This nose is so much larger than anything else," among other bats of the region, he said.

Mueller's findings show that the bat uses its elongated nose to create a highly focused sonar beam. Bats detect their environment through ultrasonic beams, or sonar, emitted from their mouths -- or noses, as in the case of the paradoxolophus bat. The echoes of the sound wave convey a wealth of information on objects in the bat's environment. This bat from the remote rainforests of South East Asia received its name 58 years ago because of its mysterious trait.

Much like a flashlight with an adjuster that can create an intense but small beam of light, the bat's nose can create a small but intense sonar beam. Mueller and his team used computer animation to compare varying sizes of bat noses, from small noses on other bats to the large nose of the paradoxolophus bat. In what Mueller calls a perfect mark of evolution, he says his computer modeling shows the length of the paradoxolophus bat's nose stops at the exact point the sonar beam's focal point would become ineffective.

"By predicting the width of the ultrasonic beam for each of these nose lengths with a computational method, we found that the natural nose length has a special value: All shortened noses provided less focus of the ultrasonic beam, whereas artificially elongated noses provided only negligible additional benefits," Mueller said. "Hence, this unusual case of a biological shape can be predicted accurately from its physical function alone."

The findings with the paradoxolophus bat are part of a larger study of approximately 120 different bat species and how they use sonar to perceive their environment. Set to finish in February 2010, it is hoped the study's focus on wave-based sensing and communication in bats will help spur groundwork for innovations in cell phone and satellite communications, as well as naval surveillance technology.


'/>"/>

Contact: Steven Mackay
smackay@vt.edu
540-231-4787
Virginia Tech
Source:Eurekalert  

Related biology news :

1. Harvard scientists solve mystery about why HIV patients are more susceptible to TB infection
2. Scientists tackle the mystery of white-nose syndrome in bats
3. Scientists unravel the mystery of white-nose syndrome
4. Research team wins funds to unravel a DNA mystery
5. Genetic sleuth solves glaucoma mystery
6. Life secret exposed: Scientists unlock mystery of molecular machine
7. Biologists solve mystery of black wolves
8. Fishdunnit! Mystery solved
9. Fish guts explain marine carbon cycle mystery
10. Peering inside the skull of a mouse to solve meningitis mystery
11. MIT researchers explain mystery of gravity fingers
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Mystery of bat with an extraordinary nose solved
(Date:4/17/2017)... , April 17, 2017 NXT-ID, Inc. ... company, announces the filing of its 2016 Annual Report on Form ... Exchange Commission. ... Form 10-K is available in the Investor Relations section of the ... on the SEC,s website at http://www.sec.gov . 2016 ...
(Date:4/11/2017)... PALM BEACH GARDENS, Fla. , April 11, ... biometric identity management and secure authentication solutions, today ... million contract by Intelligence Advanced Research Projects Activity ... technologies for IARPA,s Thor program. "Innovation ... the onset and IARPA,s Thor program will allow ...
(Date:4/11/2017)... MELBOURNE, Florida , April 11, 2017 ... "Company"), a security technology company, announces the appointment of independent ... John Bendheim to its Board of Directors, furthering the ... ... behalf of NXT-ID, we look forward to their guidance and ...
Breaking Biology News(10 mins):
(Date:10/12/2017)... , ... October 12, 2017 , ... ... two-dimensional representations of a complex biological network, a depiction of a system of ... mess,” said Dmitry Korkin, PhD, associate professor of computer science at Worcester Polytechnic ...
(Date:10/12/2017)... ... October 12, 2017 , ... AMRI, a global ... industries to improve patient outcomes and quality of life, will now be offering ... being attributed to new regulatory requirements for all new drug products, including the ...
(Date:10/11/2017)... ... October 11, 2017 , ... ComplianceOnline’s Medical Device Summit is back for ... June 2018 in San Francisco, CA. The Summit brings together current and former FDA ... board directors and government officials from around the world to address key issues in ...
(Date:10/11/2017)... ... 2017 , ... A new study published in Fertility and ... in vitro fertilization (IVF) transfer cycles. The multi-center matched cohort study ... comparing the results from the fresh and frozen transfer cohorts, the authors of ...
Breaking Biology Technology: