Highly Directional Sonar Beam of Narwhals (Monodon monoceros) Measured with a Vertical 16 Hydrophone Array
Recordings of narwhal (Monodon monoceros) echolocation signals were made using a linear 16 hydrophone array in the pack ice of Baffin Bay, West Greenland in 2013 at eleven sites. An average -3 dB beam width of 5.0° makes the narwhal click the most directional biosonar signal reported for any species...
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ftubkonstanz:oai:kops.uni-konstanz.de:123456789/50723 2024-02-11T10:01:18+01:00 Highly Directional Sonar Beam of Narwhals (Monodon monoceros) Measured with a Vertical 16 Hydrophone Array Koblitz, Jens C. Stilz, Peter Rasmussen, Marianne H. Laidre, Kristin L. 2016 application/pdf http://nbn-resolving.de/urn:nbn:de:bsz:352-2-v6jds6dzgv473 https://doi.org/10.1371/journal.pone.0162069 eng eng http://nbn-resolving.de/urn:nbn:de:bsz:352-2-v6jds6dzgv473 http://dx.doi.org/10.1371/journal.pone.0162069 27828956 1729097111 http://creativecommons.org/licenses/by/4.0/ PLoS one. Public Library of Science (PLoS). 2016, 11(11), e0162069. eISSN 1932-6203. Available under: doi:10.1371/journal.pone.0162069 ddc:570 doc-type:article doc-type:Text 2016 ftubkonstanz https://doi.org/10.1371/journal.pone.0162069 2024-01-21T23:57:21Z Recordings of narwhal (Monodon monoceros) echolocation signals were made using a linear 16 hydrophone array in the pack ice of Baffin Bay, West Greenland in 2013 at eleven sites. An average -3 dB beam width of 5.0° makes the narwhal click the most directional biosonar signal reported for any species to date. The beam shows a dorsal-ventral asymmetry with a narrower beam above the beam axis. This may be an evolutionary advantage for toothed whales to reduce echoes from the water surface or sea ice surface. Source level measurements show narwhal click intensities of up to 222 dB pp re 1 μPa, with a mean apparent source level of 215 dB pp re 1 μPa. During ascents and descents the narwhals perform scanning in the vertical plane with their sonar beam. This study provides valuable information for reference sonar parameters of narwhals and for the use of acoustic monitoring in the Arctic. published published Article in Journal/Newspaper Arctic Baffin Bay Baffin Bay Baffin Greenland Monodon monoceros narwhal* Sea ice toothed whales KOPS - The Institutional Repository of the University of Konstanz Arctic Baffin Bay Greenland PLOS ONE 11 11 e0162069 |
institution |
Open Polar |
collection |
KOPS - The Institutional Repository of the University of Konstanz |
op_collection_id |
ftubkonstanz |
language |
English |
topic |
ddc:570 |
spellingShingle |
ddc:570 Koblitz, Jens C. Stilz, Peter Rasmussen, Marianne H. Laidre, Kristin L. Highly Directional Sonar Beam of Narwhals (Monodon monoceros) Measured with a Vertical 16 Hydrophone Array |
topic_facet |
ddc:570 |
description |
Recordings of narwhal (Monodon monoceros) echolocation signals were made using a linear 16 hydrophone array in the pack ice of Baffin Bay, West Greenland in 2013 at eleven sites. An average -3 dB beam width of 5.0° makes the narwhal click the most directional biosonar signal reported for any species to date. The beam shows a dorsal-ventral asymmetry with a narrower beam above the beam axis. This may be an evolutionary advantage for toothed whales to reduce echoes from the water surface or sea ice surface. Source level measurements show narwhal click intensities of up to 222 dB pp re 1 μPa, with a mean apparent source level of 215 dB pp re 1 μPa. During ascents and descents the narwhals perform scanning in the vertical plane with their sonar beam. This study provides valuable information for reference sonar parameters of narwhals and for the use of acoustic monitoring in the Arctic. published published |
format |
Article in Journal/Newspaper |
author |
Koblitz, Jens C. Stilz, Peter Rasmussen, Marianne H. Laidre, Kristin L. |
author_facet |
Koblitz, Jens C. Stilz, Peter Rasmussen, Marianne H. Laidre, Kristin L. |
author_sort |
Koblitz, Jens C. |
title |
Highly Directional Sonar Beam of Narwhals (Monodon monoceros) Measured with a Vertical 16 Hydrophone Array |
title_short |
Highly Directional Sonar Beam of Narwhals (Monodon monoceros) Measured with a Vertical 16 Hydrophone Array |
title_full |
Highly Directional Sonar Beam of Narwhals (Monodon monoceros) Measured with a Vertical 16 Hydrophone Array |
title_fullStr |
Highly Directional Sonar Beam of Narwhals (Monodon monoceros) Measured with a Vertical 16 Hydrophone Array |
title_full_unstemmed |
Highly Directional Sonar Beam of Narwhals (Monodon monoceros) Measured with a Vertical 16 Hydrophone Array |
title_sort |
highly directional sonar beam of narwhals (monodon monoceros) measured with a vertical 16 hydrophone array |
publishDate |
2016 |
url |
http://nbn-resolving.de/urn:nbn:de:bsz:352-2-v6jds6dzgv473 https://doi.org/10.1371/journal.pone.0162069 |
geographic |
Arctic Baffin Bay Greenland |
geographic_facet |
Arctic Baffin Bay Greenland |
genre |
Arctic Baffin Bay Baffin Bay Baffin Greenland Monodon monoceros narwhal* Sea ice toothed whales |
genre_facet |
Arctic Baffin Bay Baffin Bay Baffin Greenland Monodon monoceros narwhal* Sea ice toothed whales |
op_source |
PLoS one. Public Library of Science (PLoS). 2016, 11(11), e0162069. eISSN 1932-6203. Available under: doi:10.1371/journal.pone.0162069 |
op_relation |
http://nbn-resolving.de/urn:nbn:de:bsz:352-2-v6jds6dzgv473 http://dx.doi.org/10.1371/journal.pone.0162069 27828956 1729097111 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1371/journal.pone.0162069 |
container_title |
PLOS ONE |
container_volume |
11 |
container_issue |
11 |
container_start_page |
e0162069 |
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1790597100067618816 |