Acoustic differentiation and classification of wild belugas and narwhals using echolocation clicks
Belugas (Delphinapterus leucas) and narwhals (Monodon monoceros) are highly social Arctic toothed whales with large vocal repertoires and similar acoustic profiles. Passive Acoustic Monitoring (PAM) that uses multiple hydrophones over large spatiotemporal scales has been a primary method to study th...
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ftubkonstanz:oai:kops.uni-konstanz.de:123456789/55940 2024-02-11T10:01:26+01:00 Acoustic differentiation and classification of wild belugas and narwhals using echolocation clicks Zahn, Marie J. Rankin, Shannon McCullough, Jennifer L. K. Koblitz, Jens C. Archer, Frederick Rasmussen, Marianne H. Laidre, Kristin L. 2021-11-12 application/pdf http://nbn-resolving.de/urn:nbn:de:bsz:352-2-1qh4qhru1ydkz2 https://doi.org/10.1038/s41598-021-01441-w eng eng http://nbn-resolving.de/urn:nbn:de:bsz:352-2-1qh4qhru1ydkz2 http://dx.doi.org/10.1038/s41598-021-01441-w 34772963 1782611649 http://creativecommons.org/licenses/by/4.0/ Scientific Reports. Springer Nature. 2021, 11, 22141. eISSN 2045-2322. Available under: doi:10.1038/s41598-021-01441-w ddc:570 doc-type:article doc-type:Text 2021 ftubkonstanz https://doi.org/10.1038/s41598-021-01441-w 2024-01-21T23:54:41Z Belugas (Delphinapterus leucas) and narwhals (Monodon monoceros) are highly social Arctic toothed whales with large vocal repertoires and similar acoustic profiles. Passive Acoustic Monitoring (PAM) that uses multiple hydrophones over large spatiotemporal scales has been a primary method to study their populations, particularly in response to rapid climate change and increasing underwater noise. This study marks the first acoustic comparison between wild belugas and narwhals from the same location and reveals that they can be acoustically differentiated and classified solely by echolocation clicks. Acoustic recordings were made in the pack ice of Baffin Bay, West Greenland, during 2013. Multivariate analyses and Random Forests classification models were applied to eighty-one single-species acoustic events comprised of numerous echolocation clicks. Results demonstrate a significant difference between species’ acoustic parameters where beluga echolocation was distinguished by higher frequency content, evidenced by higher peak frequencies, center frequencies, and frequency minimums and maximums. Spectral peaks, troughs, and center frequencies for beluga clicks were generally > 60 kHz and narwhal clicks < 60 kHz with overlap between 40–60 kHz. Classification model predictive performance was strong with an overall correct classification rate of 97.5% for the best model. The most important predictors for species assignment were defined by peaks and notches in frequency spectra. Our results provide strong support for the use of echolocation in PAM efforts to differentiate belugas and narwhals acoustically. published Article in Journal/Newspaper Arctic Baffin Bay Baffin Bay Baffin Beluga Beluga* Climate change Delphinapterus leucas Greenland Monodon monoceros narwhal* toothed whales KOPS - The Institutional Repository of the University of Konstanz Arctic Baffin Bay Greenland Scientific Reports 11 1 |
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KOPS - The Institutional Repository of the University of Konstanz |
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ftubkonstanz |
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English |
topic |
ddc:570 |
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ddc:570 Zahn, Marie J. Rankin, Shannon McCullough, Jennifer L. K. Koblitz, Jens C. Archer, Frederick Rasmussen, Marianne H. Laidre, Kristin L. Acoustic differentiation and classification of wild belugas and narwhals using echolocation clicks |
topic_facet |
ddc:570 |
description |
Belugas (Delphinapterus leucas) and narwhals (Monodon monoceros) are highly social Arctic toothed whales with large vocal repertoires and similar acoustic profiles. Passive Acoustic Monitoring (PAM) that uses multiple hydrophones over large spatiotemporal scales has been a primary method to study their populations, particularly in response to rapid climate change and increasing underwater noise. This study marks the first acoustic comparison between wild belugas and narwhals from the same location and reveals that they can be acoustically differentiated and classified solely by echolocation clicks. Acoustic recordings were made in the pack ice of Baffin Bay, West Greenland, during 2013. Multivariate analyses and Random Forests classification models were applied to eighty-one single-species acoustic events comprised of numerous echolocation clicks. Results demonstrate a significant difference between species’ acoustic parameters where beluga echolocation was distinguished by higher frequency content, evidenced by higher peak frequencies, center frequencies, and frequency minimums and maximums. Spectral peaks, troughs, and center frequencies for beluga clicks were generally > 60 kHz and narwhal clicks < 60 kHz with overlap between 40–60 kHz. Classification model predictive performance was strong with an overall correct classification rate of 97.5% for the best model. The most important predictors for species assignment were defined by peaks and notches in frequency spectra. Our results provide strong support for the use of echolocation in PAM efforts to differentiate belugas and narwhals acoustically. published |
format |
Article in Journal/Newspaper |
author |
Zahn, Marie J. Rankin, Shannon McCullough, Jennifer L. K. Koblitz, Jens C. Archer, Frederick Rasmussen, Marianne H. Laidre, Kristin L. |
author_facet |
Zahn, Marie J. Rankin, Shannon McCullough, Jennifer L. K. Koblitz, Jens C. Archer, Frederick Rasmussen, Marianne H. Laidre, Kristin L. |
author_sort |
Zahn, Marie J. |
title |
Acoustic differentiation and classification of wild belugas and narwhals using echolocation clicks |
title_short |
Acoustic differentiation and classification of wild belugas and narwhals using echolocation clicks |
title_full |
Acoustic differentiation and classification of wild belugas and narwhals using echolocation clicks |
title_fullStr |
Acoustic differentiation and classification of wild belugas and narwhals using echolocation clicks |
title_full_unstemmed |
Acoustic differentiation and classification of wild belugas and narwhals using echolocation clicks |
title_sort |
acoustic differentiation and classification of wild belugas and narwhals using echolocation clicks |
publishDate |
2021 |
url |
http://nbn-resolving.de/urn:nbn:de:bsz:352-2-1qh4qhru1ydkz2 https://doi.org/10.1038/s41598-021-01441-w |
geographic |
Arctic Baffin Bay Greenland |
geographic_facet |
Arctic Baffin Bay Greenland |
genre |
Arctic Baffin Bay Baffin Bay Baffin Beluga Beluga* Climate change Delphinapterus leucas Greenland Monodon monoceros narwhal* toothed whales |
genre_facet |
Arctic Baffin Bay Baffin Bay Baffin Beluga Beluga* Climate change Delphinapterus leucas Greenland Monodon monoceros narwhal* toothed whales |
op_source |
Scientific Reports. Springer Nature. 2021, 11, 22141. eISSN 2045-2322. Available under: doi:10.1038/s41598-021-01441-w |
op_relation |
http://nbn-resolving.de/urn:nbn:de:bsz:352-2-1qh4qhru1ydkz2 http://dx.doi.org/10.1038/s41598-021-01441-w 34772963 1782611649 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1038/s41598-021-01441-w |
container_title |
Scientific Reports |
container_volume |
11 |
container_issue |
1 |
_version_ |
1790597236407664640 |