Navigation Links
Underwater listening devices yield discoveries about endangered large whales

Why whales emit their characteristic calls remains largely a biological mystery, but listening for the distinctive underwater sounds provides a valuable way to track the movements of endangered large whales. Autonomous data-recording devices equipped with hydrophones (underwater microphones), deployed in remote waters off Alaska, have been used in recent years to track seasonal occurrences of blue, fin, humpback, North Pacific right, bowhead, and sperm whales, an article in the January 2006 issue of BioScience reports.

Because whale calls can be detected and recognized over tens of miles, such devices (which emit no sound) have added to scientific knowledge of the movements and calling behavior of these marine mammals. The findings have been particularly important in parts of the world, such as the seas near Alaska, where standard visual surveys are often hampered by darkness and bad weather.

The article, by Sue E. Moore of the National Oceanic and Atmospheric Administration's (NOAA's) Alaska Fisheries Science Center and three coauthors, describes the use of two types of recorders, one developed by NOAA's Pacific Marine Environmental Laboratory and the other by the Scripps Institution of Oceanography. The devices are attached to hydrophones that are held at different distances from the ocean floor and are equipped with disk drives able to store tens of gigabytes of data. This allows them to operate for months at a time before they are recovered and the data accessed. Acoustic surveys using the devices have been conducted in the Gulf of Alaska, the southeastern Bering Sea, and the western Beaufort Sea, and have already yielded surprising discoveries about whales. Sperm whales, for example, have been detected in the Gulf of Alaska year-round, although this species has been generally thought to migrate to midlatitudes in winter. And critically endangered North Pacific right whales have been detected acoustically in locations where they were formerly abundant but have not been seen in decades. The results from acoustic whale surveys conducted to date could pave the way for more sophisticated acoustic surveys that would provide data in close to real time.


'"/>

Source:American Institute of Biological Sciences


Related biology news :

1. Research tracks whales by listening to sounds
2. Cultural transmission in bats: When listening for dinner, bats learn from their neighbors
3. Dinosaur hearing, listening to muscle noise, quieter cubicles
4. Carnegie Mellon scientists create PNA molecule with potential to build nanodevices
5. Researchers make long DNA wires for future medical and electronic devices
6. Nano-devices hold promise for early-stage cancer detection
7. Are one-third of costly implanted heart devices unnecessary? New study suggests yes
8. Genome-wide mouse study yields link to human leukemia
9. Microbial fuel cell: High yield hydrogen source and wastewater cleaner
10. Insight into DNAs weakest links may yield clues to cancer biology
11. Marine sponge yields nanoscale secrets
Post Your Comments:
*Name:
*Comment:
*Email:


(Date:3/31/2016)... -- Genomics firm Nabsys has completed a financial  restructuring under ... M.D., who returned to the company in October 2015. ... including Chief Technology Officer, John Oliver , Ph.D., ... Vice President of Software and Informatics, Michael Kaiser ... Bready served as CEO of Nabsys from 2005-2014 and ...
(Date:3/23/2016)... WAKEFIELD, Massachusetts , March 23, 2016 ... kombiniert im Interesse erhöhter Sicherheit Gesichts- und ... Xura, Inc. (NASDAQ: MESG ... heute bekannt, dass das Unternehmen mit SpeechPro ... insbesondere aus der Finanzdienstleistungsbranche, wird die Möglichkeit ...
(Date:3/22/2016)... PROVO and SANDY, Utah ... (NSO), which operates the highest sample volume laboratory in ... Tute Genomics and UNIConnect, leaders in clinical sequencing informatics ... the launch of a project to establish the informatics ... NSO has been contracted by the ...
Breaking Biology News(10 mins):
(Date:6/27/2016)... , ... June 27, 2016 , ... ... their findings on what they believe could be a new and helpful biomarker ... new research. Click here to read it now. , Biomarkers are ...
(Date:6/27/2016)... --  Ginkgo Bioworks , a leading organism design ... awarded as one of the World Economic Forum,s ... innovative companies. Ginkgo Bioworks is engineering biology to ... in the nutrition, health and consumer goods sectors. ... including Fortune 500 companies to design microbes for ...
(Date:6/23/2016)... , ... June 23, 2016 , ... ... release of its second eBook, “Clinical Trials Patient Recruitment and Retention Tips.” Partnering ... retention in this eBook by providing practical tips, tools, and strategies for clinical ...
(Date:6/23/2016)... 23, 2016 Houston Methodist Willowbrook Hospital ... Sports Association to serve as their official health ... Methodist Willowbrook will provide sponsorship support, athletic training ... association coaches, volunteers, athletes and families. ... Sports Association and to bring Houston Methodist quality ...
Breaking Biology Technology: