HOME >> BIOLOGY >> NEWS
Ocean scientists assess impact of seismic pulses in effort to protect whales

WASHINGTON - Scientists investigating the possible effect of underwater seismic pulses on marine mammals have conducted a series of tests, designed to better understand the force of sound waves generated by shipboard airguns. These instruments are used by some 100 vessels worldwide to penetrate into the seabed for oil exploration and geophysical research, with an estimated 15 to 20 active on any given day.

Researchers from the Lamont-Doherty Earth Observatory of Columbia University conducted tests in the northern Gulf of Mexico in 2003, using the 20-gun array aboard their research vessel, Maurice Ewing. Their results will be published July 27 in Geophysical Research Letters (GRL), a journal of the American Geophysical Union. While most other scientific research ships can only deploy much smaller systems, Maurice Ewing's 20-gun capacity is comparable to those aboard many industry ships. It provides the flexibility to design source arrays of many different sizes and power, allowing scientists to look deep below the ocean's surface to study problems as diverse as earthquake prediction and the ocean's role in the carbon cycle.

Maya Tolstoy, lead author of the study, writes that the researchers covered sound frequencies of concern to many species of marine mammals. The GRL paper focuses in part on beaked whales, a relatively little known family of 18 species found, often at great depths, in all of the world's oceans.

Only one event of stranding of beaked whales that might be related to airgun activity has been recorded, Tolstoy writes, but there is solid evidence that some other species of whales avoid the acoustic output of seismic systems at distances up to 20 kilometers [10 miles]. In 2002, two beaked whales were stranded in the Gulf of California at around the time R/V Maurice Ewing was conducting acoustic research in the area, but a causal relationship has not been established. Some beaked whale strandings have occurred in connection with Nav
'"/>

Contact: Harvey Leifert
hleifert@agu.org
202-777-7507
American Geophysical Union
26-Jul-2004


Page: 1 2 3

Related biology news :

1. What actually influences air pollution over the Indian Ocean?
2. Melting ice cap gives urgency to new census of marine life project in Arctic Ocean
3. Ocean dye to help Rutgers scientists trace Hudson Rivers path miles into the Atlantic
4. Gulf of Maine Ocean Data Partnership announced
5. New Woods Hole Center for Oceans and Human Health established
6. Five Marine Conservation leaders receive worlds top award from Pew Institute for Ocean Science
7. Ocean life depends on single circulation pattern in Southern Hemisphere
8. Ocean plant life slows down and absorbs less carbon
9. International meeting on the Southern Ocean
10. Ocean policies havent kept up with science
11. Woods Hole Oceanographic Institution scientists respond to Buzzards Bay oil spill

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:6/18/2019)... ... 18, 2019 , ... Cirrascale Cloud Services ®, a ... as part of its dedicated, multi-GPU, deep learning cloud offerings. Powered by the ... NVIDIA® Quadro RTX™ GPUs for up to 260 teraflops of compute performance and ...
(Date:6/14/2019)... ... June 14, 2019 , ... Molecular diagnostics segment is ... be $8,760 million in 2019. Major segments that are expected to drive the ... broken out and forecasted as segments in Kalorama’s The World Molecular Diagnostics Market, ...
(Date:6/11/2019)... ... June 12, 2019 , ... With a ... plans to leverage the Geneious Biologics platform as a premium hub for bioinformatics ... at Abveris, says: “The Geneious team has done an excellent job accommodating our ...
Breaking Biology News(10 mins):
(Date:5/31/2019)... ... May 30, 2019 , ... ... demonstrate an efficient delivery system for the sustained release of human placental stem ... gel system was able to deliver CM into the injured kidney, where it ...
(Date:5/14/2019)... HARBOR TOWNSHIP, N.J. (PRWEB) , ... May 13, ... ... manufacturer of custom built, helium-based leak testing instruments for the Pharmaceutical, Biotechnology, Medical ... completely new Heliumleak.com company website. The redesigned website aims to improve LDA’s ability ...
(Date:5/4/2019)... ... May 03, 2019 , ... Diopsys Inc, the world ... Negative Response vision test, a new full field electroretinography (ffERG) protocol designed ... 6.3 million Americans will have glaucoma, with black Americans having the highest prevalence ...
(Date:5/2/2019)... ... May 02, 2019 , ... ... the greater Boston area. Gone are the days of painful hair transplant procedures. ... Hair Restoration System is the only robotic intelligent solution to offer a minimally ...
Breaking Biology Technology:
Cached News: