Three Brief Narrow-Band Sound Emissions by a Captive Male Risso's Dolphin, Grampus griseus
Caldwell, David K.
Caldwell, Melba C.
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Illustrated with a sonagram, three brief sound emissions are described and discussed. The sounds were made by a subadult male while stranded during venipuncture. It is suggested that the emissions are fragmentary or abbreviated whistle contours. The similarity of the three phonations suggests that a "signature" may be present in the whistle of individuals of this species. The literature on vocalizations by this species is summarized.