U.S. Navy: Marine Mammal Project Breaks New Ground

Posted by Greg Trauthwein
Tuesday, July 08, 2014
Dolphins jump out of the water near the Military Sealift Command dry cargo and ammunition ship USNS Alan Shepard (T-AKE-3) during an underway replenishment with the guided-missile destroyer USS Stockdale (DDG 106), not pictured. (U.S. Navy photo by Mass Communication Specialist 2nd Class David Hooper/Released)

The U.S. Navy said that a newly released scientific report demonstrates the viability of a new method to estimate received sound levels during real scenarios and analyzes movements of satellite-tagged individuals of three species of marine mammals exposed to Navy mid-frequency active sonar around Kauai's Pacific Missile Range Facility (PMRF).

"This is exciting news in several ways, not least of which is the promise this new integrated approach holds for learning how sonar affects marine mammals," said Julie Rivers, natural and marine resources program manager for the U.S. Pacific Fleet, which funded the study as part of its Marine Mammal Monitoring Program.

The report is co-authored by Robin Baird and Daniel Webster of Cascadia Research, Brandon Southall of Southall Environmental Associates, and Stephen Martin of the U.S. Navy. Morgan Richie, the Navy technical representative at Naval Facilities Engineering Command Pacific, provided technical oversight for the project.

On five occasions preceding Navy training events the researchers tagged a total of 23 marine mammals. The data from the satellite tags enabled them to track points along the animals' path and, in some cases, due to more sophisticated tags, their dive movements. The range facility's hydrophones, on the ocean floor northwest of Kauai, were used to record data on the actual levels of sound energy from sonar transmissions. That data enabled the scientists to use mathematical modeling to produce estimates of the range of sound levels to which some of the animals were exposed and to assess their responses.

Some tags didn't provide enough information, as often happens, and many of the tagged animals were not on or near the range during the brief periods when sonar was being used. Nonetheless, received sound levels were compiled and movements tracked for four animals: two rough-toothed dolphins, a bottle-nose dolphin and a short-finned pilot whale.

The researchers found that the bottlenose dolphin showed no large-scale movements out of the area during sonar exposures, and a short-finned pilot whale actually moved toward areas of higher sonar levels during the third day of a 3-day period of regular mid-frequency active sonar use. While the data from the rough-toothed dolphins are more limited than those for the bottlenose dolphin and the short-finned pilot whale, results are similar in that the animals did not make broad scale movement into areas where received sound levels would have been lower.


The report is available at http://www.cascadiaresearch.org/hawaii/Bairdetal2014_PMRFexposure.pdf

 

(Source: From U.S. Pacific Fleet Public Affairs)
 

Maritime Today


The Maritime Industry's original and most viewed E-News Service

Maritime Reporter June 2016 Digital Edition
FREE Maritime Reporter Subscription
Latest Maritime News    rss feeds

Navy

Prince Charles Places Final Section of UK Aircraft Carrier

The second of the largest warships ever built for the U.K. Royal Navy, the Queen Elizabeth Class carrier HMS Prince of Wales, was given the royal seal of approval when HRH The Prince of Wales,

US Navy Accepts Delivery of Future USS Montgomery

The U.S. Navy has accepted delivery of future USS Montgomery (LCS 8) during a ceremony on June 23 at the Austal USA shipyard in Mobile, Ala.   Marking the official

ST Marine Delivers 4th Patrol Vessel to Oman

Singapore Technologies Marine Ltd (ST Marine), the marine arm of Singapore Technologies Engineering Ltd (ST Engineering), has held the Interim Acceptance ceremony

Education/Training

Brexit: What Next for Shipping Markets?

For many in shipping, the Brexit was unexpected. Many believe that Brexit’s impact on the shipping industry will be more or less neutral.   The UK Chamber of

Donors Give $2.9 Mln to Train BC’s Future Shipbuilders

The Dennis & Phyllis Washington Foundation, in conjunction with Seaspan, announced today a multi-year, multimillion dollar investment in the future of British Columbia’s marine industrial sector.

Transas CEO Coles Salutes the World's Seafarers

A message from Frank Coles, CEO of Transas, on the International Day of the Seafarer   As an ex-seafarer, I know of the often challenging circumstances that the

Communication

PGS, Radio Holland Expand Service Agreement

Norwegian marine geophysical company PGS has extended its non-exclusive service agreement with Radio Holland for navigation and communication services onboard nine seismic vessels in its global fleet.

Simrad Tech for Sydney Fast Ferries

Four new fast ferries, owned and managed by Manly Ferries and operating in the busy waters of Sydney Harbour, will use Simrad technology for safe navigation. The

Maersk Line's Remote Control Management

One of Maersk Line's  innovations turns the reefer container into a digitally connected device!   "At Maersk Line, we’re always looking for ways to improve cargo care on behalf of our customers.

Underwater Engineering

UK First to Accept Marine Geoengineering Amendments

The United Kingdom has become the first State to formally accept the 2013 marine geoengineering amendments to the 1996 “London Protocol”, the treaty covering dumping of wastes at sea.

Orca Energy ESS to Power Fish Farm Support Vessel

Grovfjord Mek. Verksted AS (GMV) has selected Corvus Energy as the supplier of the lithium ion based energy storage system (ESS) for a fish farm support vessel called GMV ZERO.

Viscometer Helps Coating Process

Oxfordshire based Chiltern Connections specialist is a provider of conformal coating machines and associated solutions for a wide range of industrial customers.

 
 
Maritime Careers / Shipboard Positions Maritime Contracts Maritime Security Naval Architecture Offshore Oil Pipelines Salvage Ship Electronics Sonar Winch
rss | archive | history | articles | privacy | contributors | top maritime news | about us | copyright | maritime magazines
maritime security news | shipbuilding news | maritime industry | shipping news | maritime reporting | workboats news | ship design | maritime business

Time taken: 0.1107 sec (9 req/sec)