Navigation Links
Whales hear us more than we realize
Date:5/1/2014

RICHLAND, Wash. Killer whales and other marine mammals likely hear sonar signals more than we've known.

That's because commercially available sonar systems, which are designed to create signals beyond the range of hearing of such animals, also emit signals known to be within their hearing range, scientists have discovered.

The sound is likely very soft and audible only when the animals are within a few hundred meters of the source, say the authors of a new study. The signals would not cause any actual tissue damage, but it's possible that they affect the behavior of some marine mammals, which rely heavily on sound to communicate, navigate, and find food.

The findings come from a team of researchers at the Department of Energy's Pacific Northwest National Laboratory, working together with marine mammal expert Brandon Southall of Southall Environmental Associates. The findings were published April 15 in the journal PLOS ONE.

A team led by Zhiqun (Daniel) Deng, a chief scientist at PNNL, evaluated the signals from three commercially available sonar systems designed to transmit signals at 200 kilohertz. The impact of such systems on marine mammals is not typically analyzed because signals at 200 kilohertz can't be heard by the animals.

The team found that while most of the energy is transmitted near the intended frequency of 200 kilohertz, some of the sound leaks out to lower frequencies within the hearing range of killer whales and other animals such as harbor porpoises, dolphins and beluga whales. The three systems studied produced signals as low as 90, 105 and 130 kilohertz.

At the levels measured, the sounds would be quieter than many other sounds in the ocean, including the sounds the animals themselves make, and they wouldn't be heard at all by the animals beyond a few hundred meters.

"These signals are quiet, but they are audible to the animals, and they would be relatively novel since ma
'/>"/>

Contact: Tom Rickey
tom.rickey@pnnl.gov
509-375-3732
DOE/Pacific Northwest National Laboratory
Source:Eurekalert  

Page: 1 2 3

Related biology news :

1. Genetic survey of endangered Antarctic blue whales shows surprising diversity
2. Giant squids giant eyes: The better to see hungry whales with
3. New iPad, iPhone app helps mariners avoid endangered right whales
4. Study amplifies understanding of hearing in baleen whales
5. A whale of a discovery: New sensory organ found in rorqual whales
6. Scientists discover a new sensory organ in the chin of baleen whales
7. First paternity study of southern right whales finds local fathers most successful
8. New DNA-method tracks fish and whales in seawater
9. Long menopause allows killer whales to care for adult sons
10. Eating right key to survival of whales and dolphins: UBC research
11. Multi-tasking whales sing while feeding, not just breeding
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Whales hear us more than we realize
(Date:7/29/2014)... of Dentistry (UM SOD) and Medicine (UM SOM) ... five-year $10.7 million grant award from the National ... the National Institutes of Health to study the ... The grant, which renews a previous $12 million ... for the research by studying chlamydial and gonorrheal ...
(Date:7/29/2014)... has received from the National Institutes of Health ... project to support the further development of 23andMe,s ... , Specifically, the grant supports four areas ... to improve the company,s ability to identify novel ... to support the collection of a broader set ...
(Date:7/29/2014)... There,s some good news for parents of preterm babies ... that by the time they become teenagers, the brains of ... born at term. , A study conducted by the University,s ... as the preterm child experiences no brain injury in early ... as good as their term-born peers. , However, the results ...
Breaking Biology News(10 mins):University of Maryland Schools of Dentistry and Medicine receive NIH grant 2University of Maryland Schools of Dentistry and Medicine receive NIH grant 3University of Maryland Schools of Dentistry and Medicine receive NIH grant 423andMe scientists receive approximately $1.4 million in funding from National Institutes of Health 223andMe scientists receive approximately $1.4 million in funding from National Institutes of Health 3Preterm children's brains can catch up years later 2
... A potential new way to fight obesity-related illness has ... at the Case Western Reserve University School of Medicine. ... Cleveland Clinic Foundation and Cornell University, discovered the essential ... brought on by obesity. "The implications of our findings ...
... This week at Experimental Biology (EB) 2013, scientists ... on a variety of topics, including nutrition and health. ... is particular interest in the important role of diet ... the conference looked specifically at the role of whole ...
... Environmental Virology is now the official publication of ... . The new affiliation takes effect immediately. The journal, ... 2013 by Medline, the U.S. National Library of Medicine,s ... publishes original articles, notes and reviews on research relating ...
Cached Biology News:Vitamin E identified as potential weapon against obesity 2Vitamin E identified as potential weapon against obesity 3New research points to benefits of eggs, even for those at cardiovascular risk 2Food and Environmental Virology adds society affiliation 2
(Date:7/29/2014)... Boston, MA (PRWEB) July 29, 2014 ... the Library of Congress was recently awarded to Juliana ... in Stoneham, MA, for their project, “From an Egg, ... from among 3,000 final entries for the National History ... more than 300 historians and educators in Washington, D.C. ...
(Date:7/29/2014)... 2014 White papers by Clinovo ... based eClinical technologies, have been published by leading pharmaceutical ... a long line of white papers by Clinovo to ... Science Leader, Pharmaceutical Online, and OpenHealthNews. , At the ... by CTO Marc Desgrousilliers, 'The Five Essentials of ...
(Date:7/29/2014)... CAMBRIDGE, England , July 29, 2014 ... das Liquid Biopsy System (LBS) zur Erfassung ... an den Herzkranzgefäßen entwickelt und patentiert. Das ... Stellen innerhalb der Koronararterie des Patienten und ... Das LBS hat das Potenzial, die Entdeckung ...
(Date:7/28/2014)... , July 28, 2014 Sapphire ... technologies, today announced the appointment of biotechnology veteran ... the board of directors. Levine replaces Cynthia ,CJ, Warner, ... She will remain chairman of the company,s board of ... Sapphire Energy,s mission to deliver commercial scale algae-based fuels ...
Breaking Biology Technology:In Vitro Fertilization (IVF) was the Subject of This Year’s Winning Entry for the Prestigious Library of Congress “Discovery or Exploration in History Award” 2In Vitro Fertilization (IVF) was the Subject of This Year’s Winning Entry for the Prestigious Library of Congress “Discovery or Exploration in History Award” 3Clinovo White Papers Published in Summer 2014 Editions of Leading Medical Device & Pharmaceutical Publications 2Clinovo White Papers Published in Summer 2014 Editions of Leading Medical Device & Pharmaceutical Publications 3PlaqueTec sichert sich CE-Kennzeichnung für Liquid Biopsy System - bahnbrechende Innovation zur Erfassung neuer biologischer Informationen aus erkranktem Herzkranzgefäß 2PlaqueTec sichert sich CE-Kennzeichnung für Liquid Biopsy System - bahnbrechende Innovation zur Erfassung neuer biologischer Informationen aus erkranktem Herzkranzgefäß 3PlaqueTec sichert sich CE-Kennzeichnung für Liquid Biopsy System - bahnbrechende Innovation zur Erfassung neuer biologischer Informationen aus erkranktem Herzkranzgefäß 4Sapphire Energy Announces New CEO James Levine 2Sapphire Energy Announces New CEO James Levine 3
... Teresa Esser sees incredible opportunity for private equity business ... the Milwaukee-based Silicon Pastures angel investment group, ... , ,While others are talking about brain drain and ... tech sector, Esser sees plenty of positives that smart ...
... ilwaukee, Wis. - Ten years from now, when ... with color and clarity, they probably won't think much about ... But they are hard at work as movie-goers take in ... makers aren't all situated in Hollywood. One of them is ...
... Three years ago, entrepreneurs Nathan Lustig and John Tucker were ... exchange at the University of Wisconsin-Madison . , ,But ... off. He saw students regularly selling used books back to ... he saw an opportunity to cut out the middleman. ...
Cached Biology Technology:New Silicon Pastures director envisions more home cooking for Wisconsin angels 2New Silicon Pastures director envisions more home cooking for Wisconsin angels 3New Silicon Pastures director envisions more home cooking for Wisconsin angels 4New Silicon Pastures director envisions more home cooking for Wisconsin angels 5New Silicon Pastures director envisions more home cooking for Wisconsin angels 6CIO Leadership Series: Jane Durment, Marcus Corp. 2CIO Leadership Series: Jane Durment, Marcus Corp. 3CIO Leadership Series: Jane Durment, Marcus Corp. 4Website targets college students nationwide 2Website targets college students nationwide 3Website targets college students nationwide 4
... Affinity Life Sciences provides cost effective ... recombinant proteins or monoclonal antibodies. Quality at ... and whether you require research or commercial ... various production methods such as roller bottles, ...
... Packaging Extracts are optimized for maximum packaging ... The high efficiency extracts (> 109 pfu/g ... produce a library containing at least 5 ... The extracts are made from a specially ...
... enhanced statistics and statistical interpretation to ... managers. As an accepted organizational standard ... statistics for novice users and includes ... It offers a powerful JMP Scripting ...
... anti-Yersinia pestis F1 antigen, Monoclonal Antibody, ... ELISA: Use at an assay ... assay dependent dilution. WB: Use at ... weight: 18 kDa. Not tested in ...
Biology Products: