Dolphins, whales fight to be heard through ship traffic

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Dolphin calls are loud and short in the congested Atlantic Ocean to break through man-made noise, according to a study publis -More- 


source https://www.smartbrief.com/branded/D5B61895-8343-46AE-9E8D-69BF8059ECA6/732A9C13-B883-489A-BE7C-90BF6A30DCA2

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