Deafness in Dolphins
By Wendy Heller, April 12, 2009 @ 01:00 AM (EST)
Source: Iol.co.za
Researchers have concluded that repeated loud sonar blasts can cause temporary loss of hearing in dolphins, this study in connection with naval operations and strandings of cetaceans.
Numerous beachings of whales, dolphins and porpoises have occurred over the past decade, prompting a finger of blame to be pointed at warship exercises.
A theory is that the mammals' hearing becomes damaged by the powerful mid-frequency sonar used by submarines and surface vessels, prompting the creatures, which themselves use sound for navigation, to become disoriented...
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