Navigation Links
Koalas' bellows boast about size
Date:9/28/2011

Koalas have a well-earned reputation for being dopey. Sleeping 19 hours out of every 24, and feeding for 3 of the remaining 5 hours, there doesn't seem to be much time for anything else in their lethargic lifestyle: that is until the mating season. Then the males begin bellowing. Benjamin Charlton from the University of Vienna, Austria, explains that they probably bellow to attract females and to intimidate other males. But what messages could these rumbling bellows communicate about their senders? Charlton and an international team of collaborators publish their discovery that the koalas are boasting about their size in the Journal of Experimental Biology at http://jeb.biologists.org.

According to Charlton, they could be telling nearby listeners about their size. He explains that there was a possibility that koalas may be one of the few animals that have a descended larynx, which makes the vocal tract longer. Also, because all pipes including vocal tracts have frequencies where the air inside them vibrates naturally and amplifies sound, larger animals with longer vocal tracts produce lower resonances, giving their voices a more baritone quality. So, the longer vocal tracts of the largest koalas should produce deeper resonances to tell the listening koala audience just how big they are. Intrigued, Charlton, Tecumseh Fitch and their colleagues decided to find out whether male koalas have descended larynxes.

Teaming up with Allan McKinnon at Moggill Koala Hospital and Gary Cowin and William Ellis at the University of Queensland, Australia, Charlton investigated the anatomy of the marsupial's vocal tract. Using MRI and post-mortem studies, the team found that the koala's larynx had descended to the level of the 3rd and 4th cervical vertebrae, instead of being high in the throat. They were also surprised to find that the muscle that attaches the larynx to the sternum was anchored very deep in the t
'/>"/>

Contact: Kathryn Knight
kathryn@biologists.com
44-078-763-44333
The Company of Biologists
Source:Eurekalert

Page: 1 2

Related biology news :

1. Loud and lazy but didnt chew gum: Ancient koalas
2. What can magnetic resonance tractography teach us about human brain anatomy?
3. New approach challenges old ideas about plant species and biomass
4. Scientists concerned about pesticide education funding
5. Clemson University peach specialist unveils CaroTiger, something to roar about
6. Interventional radiologists: Learn about peripheral arterial disease and get moving
7. BUSM professor authors book on how knowledge about genes and family history can save lives
8. Not so fast -- researchers find that lasting evolutionary change takes about 1 million years
9. No bones about it: Eating dried plums helps prevent fractures and osteoporosis
10. Paranoia about rivals alters insect mating behavior
11. UNC-Duke ties lead to collaborative finding about cell division & metabolism
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/24/2014)... funded by the New Jersey Recovery Fund and conducted ... Planning and Public Policy at Rutgers University has found ... about the likelihood of community-based rebuilding solutions. Of the ... they were "pessimistic" or "very pessimistic" that the parts ... rebuilt better than they were before the storm; another ...
(Date:7/24/2014)... in German . ... asthma sufferers worldwide, a further 600 million people living ... global population contending with allergic rhinitis (allergic inflammation of ... other organs and parts of the body beyond the ... the form of inflammatory bowel diseases such as colitis ...
(Date:7/24/2014)... NXT-ID, Inc., (NXTD: OTCQB) a biometric authentication company focused ... wallet, Wocket™, was recently the topic of  an interview on ... Gino Pereira , CEO of NXT-ID, on July 9 ... Mr. Gino Pereira explains how the Wocket ... and walks host Anita Finley through the ...
Breaking Biology News(10 mins):Rutgers study explores attitudes, preferences toward post-Sandy rebuilding 2New drugs to combat asthma and the like 2New drugs to combat asthma and the like 3Boomer Times Gets to Know NXT-ID's Next Generation Wocket Smart Wallet; Practical, Secure and Easy to Use 2Boomer Times Gets to Know NXT-ID's Next Generation Wocket Smart Wallet; Practical, Secure and Easy to Use 3Boomer Times Gets to Know NXT-ID's Next Generation Wocket Smart Wallet; Practical, Secure and Easy to Use 4
... an effective anti-fouling coating to release toxins into the environment. ... is instead possible to mix into the coating molecules on ... published in the scientific journal Biofouling . Fouling ... one of the most difficult organisms to deal with is ...
... To arrange for an interview with a researcher, please ... the end of each tip. For more information on ORNL ... of our Media Contacts. If you have a general media-related ... . RACING -- Green checkered flag . . ...
... tea may slow down weight gain and serve as another ... food scientists. Obese mice that were fed a compound ... weight significantly more slowly than a control group of mice ... Lambert, assistant professor of food science in agricultural sciences. ...
Cached Biology News:A coating that prevents barnacles forming colonies 2Story tips from the Department of Energy's Oak Ridge National Laboratory, October 2011 2Story tips from the Department of Energy's Oak Ridge National Laboratory, October 2011 3Story tips from the Department of Energy's Oak Ridge National Laboratory, October 2011 4Green tea helps mice keep off extra pounds 2
(Date:7/24/2014)... PARK, Calif. , July 24, 2014 /PRNewswire/ ... company in the emerging field of regenerative medicine, ... webcast of a presentation to investors on Tuesday, ... p.m. PDT.  The presentation will include an overview ... To access the webcast, visit http://www.ustream.tv/channel/asterias-biotherapeutics ...
(Date:7/24/2014)... to materialise. Yet, scientists are making progress in ... One such approach relies on quantum dotsa kind ... electric field. A new study demonstrates that changing ... (TQDs) with electrical impulses can help better control ... be used as quantum information units, which would ...
(Date:7/24/2014)... DUBLIN , July 24, 2014 ... the "Global Genomics and Proteomics Analytical Instruments Market ... http://photos.prnewswire.com/prnh/20130307/600769 Genomics is the ... is the study of the structure and functions of ... and bioinformatics tools and technology. Genomics involves the mapping ...
(Date:7/24/2014)... 24, 2014 Three companies from the ... Livestrong’s Big C Competition. Out of 700 competition entrants, ... to the semi-final round. In this round twenty teams ... program, complete with mentoring from thought-leaders and medical entrepreneurs ... of the angelMD commitment to the Livestrong vision around ...
Breaking Biology Technology:Asterias Biotherapeutics Announces Live Investor Webcast 2Asterias Biotherapeutics Announces Live Investor Webcast 3Asterias Biotherapeutics Announces Live Investor Webcast 4Global Genomics and Proteomics Analytical Instruments Market 2014-2018: Key Vendors are Agilent, Bio-Rad , F. Hoffmann, La Roche, Illumina, PerkinElmer and Thermo Fisher Scientific 23 angelMD Startups Make Livestrong Big C Semi-finals 2
... 18 Premier Research Group plc (AIM:,PRG) announces ... Vice President,Global Human Resources. Mr. Keenen will be ... related to maximizing the,effectiveness of Premier Research,s people ... Dr. Troy McCall, COO, commented: "We are ...
... Ultra-low power DSP core from CEVA provides unmatched ... for state-of-the-art cochlear implant system, SAN JOSE, ... ; LSE: CVA), a leading licensor of innovative ... wireless, consumer and,multimedia applications, today announced that Advanced ...
... TOKYO, September 18 Sosei Group Corporation,("Sosei"; TSE ... AD 337, an enantiomer of an approved, centrally ... of principle trial,for the treatment of fibromyalgia syndrome ... placebo,controlled, parallel group exploratory study, investigated the efficacy,safety ...
Cached Biology Technology:Premier Research Appoints Global Head of Human Resources 2Advanced Bionics Deploys CEVA-TeakLite(TM) DSP Core to Enhance Its Harmony(TM) HiResolution(R) Bionic Ear System 2Advanced Bionics Deploys CEVA-TeakLite(TM) DSP Core to Enhance Its Harmony(TM) HiResolution(R) Bionic Ear System 3Sosei Announces Completion of Phase II Trial of AD 337 in Fibromyalgia Syndrome 2
Matrix for protein MALDI-MS...
... This CLS number is ... created to easily match ... showing no availability yet, ... old Sigma-Aldrich number (Z36,327-8) ...
... IPL-41 is part of a series of ... Laboratory by Weiss et al. for the large ... frugiperda. The medium is primarily used for the ... lepidopterans and the propagation of viruses in these ...
... A number of modifications of Grace's ... the late 1960's and 1970's. Many of ... Hink for the growth of cells derived ... represents the modification known as TNM-FH. The ...
Biology Products: