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 Reporter February 2015 Digital Edition
FREE Maritime Reporter Subscription
Latest Maritime News    rss feeds

Navy

Australia Announces Patrol Boat Tender

Tender announced for Pacific Patrol Boat Replacement Project   The Australian Government announced a Request for Tender (RFT) to replace the Pacific Patrol Boats

6 NATO Ships Begin Joint Black Sea Exercise

Six NATO warships, including Turkish, Bulgarian and Romanian vessels, have arrived to the Black Sea to start joint training exercises.    NATO ships assigned

Fire Aboard US Navy Ship

A fire broke out aboard a U.S. Navy amphibious dock landing ship USS Gunston Hall (LSD 44) at approximately 2 p.m. yesterday while the ship was undergoing maintenance

Education/Training

BIMCO Environmental Performance Guide

BIMCO today launched a new, multi-part guidance resource to support ship owners and operators in improving their environmental performance and the efficiency of their ships.

Fiji Maritime Academy Bullish on Prospects

The Fiji Maritime Academy (FMA) is on the right track to become one of the finest maritime training institutions in the region. It has also achieved an important

Vessels for the Future – New R&D Initiative

Looking ahead to 2020 and beyond, both maritime and inland waterways will be under ever increasing pressure, as we use them for transport, recreation and commercially.

Communication

GOST to Unveil New Products at MSE Conference

GOST (Global Ocean Security Technologies),announced today that it will highlight its newest commercial maritime products at the 2015 Maritime Security East conference in Jacksonville,

G&D Launches US Subsidiary

German KVM company Guntermann & Drunck GmbH (G&D) announced it will distribute its equipment from new U.S. subsidiary G&D North America Inc. in Miami, Fla.      With

VesselVanguard Partners with Hatteras Yachts

VesselVanguard announced today a new partnership with Hatteras Yachts to provide a five-year subscription for its award-winning maintenance management solution

Underwater Engineering

Wintershall Takes Over Operatorship of Norwegian Subsea Oil and Gas Field

Wintershall has taken over the operatorship of the subsea oil and gas field Vega from Statoil, Wintershall announced today.   Vega is the BASF subsidiary’s

New Tool for Recovering Oil from Sunken Wrecks

A tool for removing oil trapped in submerged vessels has been developed in Norway by design specialists Miko Marine.   The launch of the Moskito aims to address

Ensco Announces Cash Tender Offer

Ensco plc announced today that it has commenced a cash tender offer to purchase any and all of its outstanding 3.25% Senior Notes due 2016 (CUSIP No. 29358QAB5).

 
 
Maritime Contracts Maritime Standards Navigation Offshore Oil Pod Propulsion Salvage Ship Electronics Ship Simulators Shipbuilding / Vessel Construction Sonar
rss | archive | history | articles | privacy | terms and conditions | 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: 0.3681 sec (3 req/sec)