Navy study: Sonar, Blasts Might Hurt More Sea Life

dolphins-california-coast
Photo courtesy of: © PAYC

Excerpts;

The U.S. Navy may hurt more dolphins and whales by using sonar and explosives in Hawaii and California under a more thorough analysis that reflects new research and covers naval activities in a wider area than previous studies…

Read Full Article, AP

Accoustic Pollution and Naval Sonar testing
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. Under a plan announced by the NOAA, marine mammal “hot spots” in areas including Southern California’s coastal waters, may become off limits to testing of a type of Navy sonar linked to the deaths of whales.

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…

Training and Testing Environmental Impact Statement (EIS)/Overseas Environmental Impact Statement (OEIS) website, NAVY