Dolphins whistle to each other as part of a male bonding ritual and rely on 'wingmen' to vie for the affection of potential mates, new research has found. Experts at the University of Bristol said bottlenose dolphins can become more popular simply through vocal exchanges, helping them to maintain weaker but vital social relationships.Not only this, but a separate study using the same data found that the more popular a dolphin is with other males, the more successful it is when it comes to producing calves.
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