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

M. de Freitas; J.N. Smith; F.H. Jensen; K. Beedholm; P.T. Madsen

doi:10.1121/1.5034174

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

Journal article

Peer reviewed

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

M. de Freitas, J.N. Smith, F.H. Jensen, K. Beedholm and P.T. Madsen

The Journal of the Acoustical Society of America, Vol.143(4), pp.2564-2569

2018

DOI: https://doi.org/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.

Details

Title: Echolocation click source parameters of Australian snubfin dolphins (Orcaella heinsohni)
Authors/Creators: M. de Freitas (Author/Creator) - Aarhus University
J.N. Smith (Author/Creator) - Murdoch University
F.H. Jensen (Author/Creator) - Aarhus University
K. Beedholm (Author/Creator) - Aarhus University
P.T. Madsen (Author/Creator) - Aarhus University
Publication Details: The Journal of the Acoustical Society of America, Vol.143(4), pp.2564-2569
Publisher: Acoustical Society of America
Identifiers: 991005540369407891
Copyright: © 2018 Acoustical Society of America
Murdoch Affiliation: School of Veterinary and Life Sciences
Language: English
Resource Type: Journal article

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Collaboration types: Domestic collaboration; International collaboration
Citation topics: 3 Agriculture, Environment & Ecology; 3.35 Zoology & Animal Ecology; 3.35.796 Marine Mammal Ecology
Web Of Science research areas: Acoustics; Audiology & Speech-language Pathology
ESI research areas: Physics