File:Bulletin of the Southern California Academy of Sciences (1902-1971.) (20497650155).jpg

Title: Bulletin of the Southern California Academy of Sciences
Identifier: bulletinofsouthe6669sout (find matches)
Year: 1902-1971. (1900s)
Authors: Southern California Academy of Sciences
Subjects: Science; Natural history; Natural history
Publisher: Los Angeles, Calif. : The Academy
Contributing Library: New York Botanical Garden, LuEsther T. Mertz Library
Digitizing Sponsor: The LuEsther T Mertz Library, the New York Botanical Garden

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Sounds from Dolphin 253 Observations Two subadult males that we attempted to record at Marineland of Florida were part of a group of two males and two females that stranded near there in early 1966. Although we did not attempt to record any of these animals until the end of that year, it is our understanding that several attempts had been made previously, but that because of the presence of several Atlantic bottlenosed dolphins (Tursiops truncatus) and at least one spotted dolphin (Stenella plagiodon), it was impossible to ascertain which phonations, if any, had been emitted by the Grampus. The Caldwells had the same problem in late 1966 when only the two males remained alive. Further attempts were continued intermit- tently, but with the addition to the community tank of eastern Pacific pilot whales (Globicephala scammoni) from time to time and a Pacific whitesided dolphin (Lagenorhynchus obliquidens) for most of the time, the problem of matching phonations with emitters has been com- pounded. In a community of such complex composition, positive identi- fication would necessitate a concurrent phonation and release of air bubbles from the blowhole of a particular animal. We observed this on one occasion, but we were not recording at the time. This obser- vation indicates that the males are capable of producing a presumably harmonic whistle. On this occasion the larger male Grampus, after about 2.5 years in captivity, was rapidly chasing a large adult male Tursiops in the community tank. A clear loud whistle of very long
Text Appearing After Image:
Fi^'iirc 1. Captive subadult male Grampus f^risciis (MLF 156). (Photograph cour- tesy Marineland of Florida).

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