Sound Levels of Blue Whale Songs Decrease

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Blue whales have decreased the sound levels of their songs used to attract potential mates for the past few decades.  While this may seem alarming, scientists at Scripps Institution of Oceanography at UC-San Diego believe this may be positive news for this endangered species.  What this trend may point to is an increase in the numbers of blue whales.  When blue whale populations plummeted due to commercial whaling, the scientists speculate that males may have needed to sing at higher sound levels to maximize the distance their songs traveled.  This would have helped them located widely dispersed potential mates and competing males.  As populations rebound, these higher sound levels are less necessary.

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