Three Brief Narrow-Band Sound Emissions by a Captive Male Risso's Dolphin, Grampus griseus
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.
Caldwell, David K. and Caldwell, Melba C.
"Three Brief Narrow-Band Sound Emissions by a Captive Male Risso's Dolphin, Grampus griseus,"
Bulletin of the Southern California Academy of Sciences:
Available at: http://scholar.oxy.edu/scas/vol68/iss4/8