Bottlenose dolphins (Tursiops truncatus) wore opaque suction cups over their eyes while stationing behind an acoustically opaque door. This put the dolphins in a known position and orientation. When the door opened, the dolphin clicked to detect targets. Trainers specified that Dolphin S emit a whistle if the target was a 7.5 cm water filled sphere, or a pulse burst if the target was a rock. S remained quiet if there was no target. Dolphin B whistled for the sphere. She remained quiet for rock and for no target. Thus, S had to choose between three different responses, whistle, pulse burst, or remain quiet. B had to choose between two different responses, whistle or remain quiet. S gave correct vocal responses averaging 114 ms after her last echolocation click (range 182 ms before and 219 ms after the last click). Average response for B was 21 ms before her last echolocation click (range 250 ms before and 95 ms after the last click in the train). More often than not, B began her whistle response before her echolocation train ended. The findings suggest separate neural pathways for generation of response vocalizations as opposed to echolocation clicks.
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January 2012
January 13 2012
Vocal reporting of echolocation targets: Dolphins often report before click trains end Available to Purchase
S. H. Ridgway;
S. H. Ridgway
a)
National Marine Mammal Foundation, 2240 Shelter Island Drive, San Diego, California 92106
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W. R. Elsberry;
W. R. Elsberry
Fish and Wildlife Research Institute
, 100 8th Avenue South East, St. Petersburg, Florida 33701
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D. J. Blackwood;
D. J. Blackwood
Fish and Wildlife Research Institute
, 100 8th Avenue South East, St. Petersburg, Florida 33701
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T. Kamolnick;
T. Kamolnick
Animal Training Consultants, 4886 Orchard Avenue, No. D, San Diego, California 92107
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M. Todd;
M. Todd
Animal Training Consultants, 4886 Orchard Avenue, No. D, San Diego, California 92107
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D. A. Carder;
D. A. Carder
U.S. Navy Marine Mammal Program, SSC Pacific, San Diego, Code 71510, 535 Hull Street, San Diego, California 92152
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Monica Chaplin;
Monica Chaplin
Disney’s Animal Kingdom, 1200 North Savannah Circle East Bay Lake, Florida 32830
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T. W. Cranford
T. W. Cranford
Department of Biology,
San Diego State University
, 5500 Campanile Drive, San Diego, California 92182
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S. H. Ridgway
a)
W. R. Elsberry
D. J. Blackwood
T. Kamolnick
M. Todd
D. A. Carder
Monica Chaplin
T. W. Cranford
National Marine Mammal Foundation, 2240 Shelter Island Drive, San Diego, California 92106
a)
Author to whom correspondence should be addressed. Electronic mail: [email protected]
J. Acoust. Soc. Am. 131, 593–598 (2012)
Article history
Received:
August 23 2011
Accepted:
October 25 2011
Citation
S. H. Ridgway, W. R. Elsberry, D. J. Blackwood, T. Kamolnick, M. Todd, D. A. Carder, Monica Chaplin, T. W. Cranford; Vocal reporting of echolocation targets: Dolphins often report before click trains end. J. Acoust. Soc. Am. 1 January 2012; 131 (1): 593–598. https://doi.org/10.1121/1.3664074
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