News Finding: Noise levels in the world's oceans are on the rise and this new study found that dolphins are simplifying their cal  
Paper Finding: Consequently, the noiseinduced simplification of dolphin whistles may reduce the information content in these acoustic signals and decrease effective communication, parent -offspring proximity or group cohesion.
News Context: Noise levels in the world's oceans are on the rise and this new study found that dolphins are simplifying their cal  
Paper Context: Increases in ship noise, both within and below the dolphins' call bandwidth, resulted in higher dolphin whistle frequencies and a reduction in whistle contour complexity, an acoustic feature associated with individual identification. Consequently, the noiseinduced simplification of dolphin whistles may reduce the information content in these acoustic signals and decrease effective communication, parent -offspring proximity or group cohesion. Vocal adjustments may compensate for increased ambient noise, but there may be constraints that limit this ability or ecological consequences to modified signals.