Accoustic Pollution and Naval Sonar testing

Accoustic Pollution and Naval Sonar testing

whale bone
Whale vertebrae. Photo source: ©© chrisstreeter

Excerpts;

Whales and the U.S. Navy have tangled repeatedly over the past years over charges that the Navy’s sonar exercises disorient or injure whales and other marine mammals. Now, whales in the Pacific appear to have a new champion: the National Oceanic and Atmospheric Administration, which is considering limiting the Navy’s sonar tests in certain marine mammal “hot spots.”

The announcement was made in a letter from NOAA head Jane Lubchenco to the White House Council on Environmental Quality…

Read Full Article, Discover Magazine

NOAA may prohibit Navy sonar testing at marine mammal ‘hot spots’, Los Angeles Times

Groups sue over Navy sonar use off Northwest, AP

Accoustic Pollution and Marine Mammals, Nature
In the Canary Islands, 14 beaked whales washed ashore bleeding from the ears. All eventually died. A post-mortem examination revealed that the whales showed signs of decompression sickness (what scuba divers call “the bends”). Decompression sickness can occur when a mammal swims to the ocean’s surface too quickly, and the change in pressure produces lethal nitrogen gas bubbles that clog its blood vessels. Evidence of acute decompression sickness indicates unusual behavior. Over the past 40 years, cumulative research across the globe has revealed a coincidence between naval sonar testing events and acute decompression sickness in beached marine mammals…

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