Here is some interesting research about anthropogenic underwater noise decreasing whale communication. This has come out of the Cornell Lab of Ornithology who we are currently working with on the hydrophone (MARU) deployments in the Corcovado feeding ground.
Read more at: http://www.sciencedaily.com/releases/2012/08/120815142050.htm?utm_source=feedburner&utm_medium=email&utm_campaign=Feed%3A+sciencedaily%2Fplants_animals%2Fdolphins_and_whales+%28ScienceDaily%3A+Plants+%26+Animals+News+--+Dolphins+and+Whales%29