Identification of western North Atlantic odontocete echolocation click types using machine learning and spatiotemporal correlates
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-d...
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ftcdlib:oai:escholarship.org:ark:/13030/qt3266r4v8 2024-04-21T08:06:55+00:00 Identification of western North Atlantic odontocete echolocation click types using machine learning and spatiotemporal correlates Cohen, Rebecca E Frasier, Kaitlin E Baumann-Pickering, Simone Wiggins, Sean M Rafter, Macey A Baggett, Lauren M Hildebrand, John A Halliday, William David e0264988 2022-01-01 https://escholarship.org/uc/item/3266r4v8 unknown eScholarship, University of California qt3266r4v8 https://escholarship.org/uc/item/3266r4v8 public PLOS ONE, vol 17, iss 3 Environmental Sciences Biological Sciences Ecology Acoustics Animals Dolphins Echolocation Machine Learning Sperm Whale Vocalization Animal Whales General Science & Technology article 2022 ftcdlib 2024-03-27T15:50:23Z 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. Article in Journal/Newspaper Mesoplodon bidens North Atlantic Physeter macrocephalus Sperm whale University of California: eScholarship |
institution |
Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
unknown |
topic |
Environmental Sciences Biological Sciences Ecology Acoustics Animals Dolphins Echolocation Machine Learning Sperm Whale Vocalization Animal Whales General Science & Technology |
spellingShingle |
Environmental Sciences Biological Sciences Ecology Acoustics Animals Dolphins Echolocation Machine Learning Sperm Whale Vocalization Animal Whales General Science & Technology Cohen, Rebecca E Frasier, Kaitlin E Baumann-Pickering, Simone Wiggins, Sean M Rafter, Macey A Baggett, Lauren M Hildebrand, John A Identification of western North Atlantic odontocete echolocation click types using machine learning and spatiotemporal correlates |
topic_facet |
Environmental Sciences Biological Sciences Ecology Acoustics Animals Dolphins Echolocation Machine Learning Sperm Whale Vocalization Animal Whales General Science & Technology |
description |
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. |
author2 |
Halliday, William David |
format |
Article in Journal/Newspaper |
author |
Cohen, Rebecca E Frasier, Kaitlin E Baumann-Pickering, Simone Wiggins, Sean M Rafter, Macey A Baggett, Lauren M Hildebrand, John A |
author_facet |
Cohen, Rebecca E Frasier, Kaitlin E Baumann-Pickering, Simone Wiggins, Sean M Rafter, Macey A Baggett, Lauren M Hildebrand, John A |
author_sort |
Cohen, Rebecca E |
title |
Identification of western North Atlantic odontocete echolocation click types using machine learning and spatiotemporal correlates |
title_short |
Identification of western North Atlantic odontocete echolocation click types using machine learning and spatiotemporal correlates |
title_full |
Identification of western North Atlantic odontocete echolocation click types using machine learning and spatiotemporal correlates |
title_fullStr |
Identification of western North Atlantic odontocete echolocation click types using machine learning and spatiotemporal correlates |
title_full_unstemmed |
Identification of western North Atlantic odontocete echolocation click types using machine learning and spatiotemporal correlates |
title_sort |
identification of western north atlantic odontocete echolocation click types using machine learning and spatiotemporal correlates |
publisher |
eScholarship, University of California |
publishDate |
2022 |
url |
https://escholarship.org/uc/item/3266r4v8 |
op_coverage |
e0264988 |
genre |
Mesoplodon bidens North Atlantic Physeter macrocephalus Sperm whale |
genre_facet |
Mesoplodon bidens North Atlantic Physeter macrocephalus Sperm whale |
op_source |
PLOS ONE, vol 17, iss 3 |
op_relation |
qt3266r4v8 https://escholarship.org/uc/item/3266r4v8 |
op_rights |
public |
_version_ |
1796946407396999168 |