Acoustic behavior of echolocating porpoises during prey capture.

Acoustic behavior of echolocating porpoises during prey capture. Research Abstract Details 

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Acoustic behavior of echolocating porpoises during prey capture. Abstract Text:

Porpoise echolocation has been studied in target detection experiments using stationed animals and steel spheres as targets, but little is known about the acoustic behavior of free swimming porpoises as they echolocate for prey. Here we used archival tags (modified Dtags) recording audio (400 kHz, 16-bit stereo sampling rate) and animal movements (depth, heading, 3D pitch and roll, and acceleration) to study echolocation in trained porpoises catching fish. The prey capture experiments were conducted with and without suction cups covering the porpoises' eyes. Without the eye cups, the porpoises could use both echolocation and vision to locate and ingest their prey, but with eye cups they could use only echolocation. Our data show that time to prey capture is about 27% greater with eye cups (T-test, p<0.01). They also allow us to describe and compare prey capture in the two experimental conditions, including analysis of the animals' detailed movements and echolocation behavior leading up to and following prey capture events.

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Acoustic behavior of echolocating porpoises during prey capture. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: The Journal of the Acoustical Society of America

VOLUME: 123

Page Numbers: 3361

Journal Abbreviation: J. Acoust. Soc. Am.

ISSN: 1520-8524

DAY: 5

MONTH: May

YEAR: 2008

Acoustic behavior of echolocating porpoises during prey capture. Information

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LANGUAGE: eng

NlmUniqueID: 7503051

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Grant and Affiliation Information for Acoustic behavior of echolocating porpoises during prey capture.

AFFILIATION: Woods Hole Oceanographic Institution, Applied Ocean Physics & Engineering Dept., Woods Hole, MA 02543, USA, deruiter@mit.edu.

Country: United States

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MEDLINETA: J Acoust Soc Am

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