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A signature whistle is a learned, individually distinctive whistle type in a bottlenose dolphin's (Tursiops truncatus) acoustic repertoire that gives the identity of the whistle owner. [1] The whistles are identified and studied in the wild or in captivity by researchers using hydrophones . [ 2 ]
A unique signature whistle develops quite early in a dolphin's life, and it appears to be created in imitation of the signature whistle of the dolphin's mother. [60] Imitation of the signature whistle seems to occur only among the mother and its young, and among befriended adult males. [61]
Common bottlenose dolphin signature whistles, which are in a higher frequency range than humans can hear, have an important role in facilitating mother–calf contact. [30] In the Sarasota Dolphin Research Program's library of recordings were 19 female common bottlenose dolphins ( Tursiops truncatus ) producing signature whistles both with and ...
These included 2,291 whistles, 2,288 burst-pulses — a rapid series of clicks sometimes associated with aggression — 5,487 low-frequency tonal sounds and 767 percussive sounds.
Dolphin echolocation clicks are amongst the loudest sounds made by marine animals. [29] Bottlenose dolphins have been found to have signature whistles. These whistles are used in order for dolphins to communicate with one another by identifying an individual. It can be seen as the dolphin equivalent of a name for humans. [30]
The noise that they make is a short burst of pulses followed by a whistle, and they only use it to indicate that a situation is pleasant or non-threatening. #28 Image credits: thesnuggleisrl