In:
PLOS ONE, Public Library of Science (PLoS), Vol. 17, No. 3 ( 2022-3-24), p. e0264988-
Abstract:
A combination of machine learning and expert analyst review was used to detect odontocete echolocation clicks, identify dominant click types, and classify clicks in 32 years of acoustic data collected at 11 autonomous monitoring sites in the western North Atlantic between 2016 and 2019. Previously-described click types for eight known odontocete species or genera were identified in this data set: Blainville’s beaked whales ( Mesoplodon densirostris ), Cuvier’s beaked whales ( Ziphius cavirostris ), Gervais’ beaked whales ( Mesoplodon europaeus ), Sowerby’s beaked whales ( Mesoplodon bidens ), and True’s beaked whales ( Mesoplodon mirus ), Kogia spp ., Risso’s dolphin ( Grampus griseus ), and sperm whales ( Physeter macrocephalus ). Six novel delphinid echolocation click types were identified and named according to their median peak frequencies. Consideration of the spatiotemporal distribution of these unidentified click types, and comparison to historical sighting data, enabled assignment of the probable species identity to three of the six types, and group identity to a fourth type. UD36, UD26, and UD28 were attributed to Risso’s dolphin ( G . griseus ), short-finned pilot whale ( G . macrorhynchus ), and short-beaked common dolphin ( D . delphis ), respectively, based on similar regional distributions and seasonal presence patterns. UD19 was attributed to one or more species in the subfamily Globicephalinae based on spectral content and signal timing. UD47 and UD38 represent distinct types for which no clear spatiotemporal match was apparent. This approach leveraged the power of big acoustic and big visual data to add to the catalog of known species-specific acoustic signals and yield new inferences about odontocete spatiotemporal distribution patterns. The tools and call types described here can be used for efficient analysis of other existing and future passive acoustic data sets from this region.
Type of Medium:
Online Resource
ISSN:
1932-6203
DOI:
10.1371/journal.pone.0264988
DOI:
10.1371/journal.pone.0264988.g001
DOI:
10.1371/journal.pone.0264988.g002
DOI:
10.1371/journal.pone.0264988.g003
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10.1371/journal.pone.0264988.g004
DOI:
10.1371/journal.pone.0264988.g005
DOI:
10.1371/journal.pone.0264988.g006
DOI:
10.1371/journal.pone.0264988.g007
DOI:
10.1371/journal.pone.0264988.g008
DOI:
10.1371/journal.pone.0264988.g009
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10.1371/journal.pone.0264988.g010
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10.1371/journal.pone.0264988.g011
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10.1371/journal.pone.0264988.g012
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10.1371/journal.pone.0264988.g013
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10.1371/journal.pone.0264988.g014
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10.1371/journal.pone.0264988.g015
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10.1371/journal.pone.0264988.g016
DOI:
10.1371/journal.pone.0264988.t001
DOI:
10.1371/journal.pone.0264988.t002
DOI:
10.1371/journal.pone.0264988.s001
DOI:
10.1371/journal.pone.0264988.s002
DOI:
10.1371/journal.pone.0264988.s003
DOI:
10.1371/journal.pone.0264988.s004
DOI:
10.1371/journal.pone.0264988.s005
DOI:
10.1371/journal.pone.0264988.s006
DOI:
10.1371/journal.pone.0264988.s007
DOI:
10.1371/journal.pone.0264988.s008
Language:
English
Publisher:
Public Library of Science (PLoS)
Publication Date:
2022
detail.hit.zdb_id:
2267670-3
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