Echolocation click source parameters of Australian snubfin dolphins (Orcaella heinsohni)

Mafalda De Freitas; Joshua N. Smith; Frants H. Jensen; Kristian Beedholm; Peter T. Madsen

doi:10.1121/1.5034174

Echolocation click source parameters of Australian snubfin dolphins (Orcaella heinsohni)

Mafalda De Freitas, Joshua N. Smith, Frants H. Jensen, Kristian Beedholm, Peter T. Madsen

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

The Australian snubfin dolphin (Orcaella heinsohni) is endemic to Australian waters, yet little is known about its abundance and habitat use. To investigate the feasibility of Passive Acoustic Monitoring for snubfin dolphins, biosonar clicks were recorded in Cygnet Bay, Australia, using a four-element hydrophone array. Clicks had a mean source level of 200 ± 5 dB re 1 μPa pp, transmission directivity index of 24 dB, mean centroid frequency of 98 ± 9 kHz, and a root-mean-square bandwidth of 31 ± 3 kHz. Such properties lend themselves to passive acoustic monitoring, but are comparable to similarly-sized delphinids, thus requiring additional cues to discriminate between snubfins and sympatric species.

Original language	English (US)
Pages (from-to)	2564-2569
Number of pages	6
Journal	Journal of the Acoustical Society of America
Volume	143
Issue number	4
DOIs	https://doi.org/10.1121/1.5034174
State	Published - Apr 1 2018
Externally published	Yes

ASJC Scopus subject areas

Arts and Humanities (miscellaneous)
Acoustics and Ultrasonics

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10.1121/1.5034174

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abstract = "The Australian snubfin dolphin (Orcaella heinsohni) is endemic to Australian waters, yet little is known about its abundance and habitat use. To investigate the feasibility of Passive Acoustic Monitoring for snubfin dolphins, biosonar clicks were recorded in Cygnet Bay, Australia, using a four-element hydrophone array. Clicks had a mean source level of 200 ± 5 dB re 1 μPa pp, transmission directivity index of 24 dB, mean centroid frequency of 98 ± 9 kHz, and a root-mean-square bandwidth of 31 ± 3 kHz. Such properties lend themselves to passive acoustic monitoring, but are comparable to similarly-sized delphinids, thus requiring additional cues to discriminate between snubfins and sympatric species.",

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AU - Beedholm, Kristian

AU - Madsen, Peter T.

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Echolocation click source parameters of Australian snubfin dolphins (Orcaella heinsohni)

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