KOPS - The Institutional Repository of the University of Konstanz

Vertical sonar beam width and scanning behavior of wild belugas (Delphinapterus leucas) in West Greenland

Vertical sonar beam width and scanning behavior of wild belugas (Delphinapterus leucas) in West Greenland

Cite This

Files in this item

Checksum: MD5:0073ec6fa9e29f5bb6bce440605a86bb

ZAHN, Marie J., Kristin L. LAIDRE, Peter STILZ, Marianne H. RASMUSSEN, Jens C. KOBLITZ, 2021. Vertical sonar beam width and scanning behavior of wild belugas (Delphinapterus leucas) in West Greenland. In: PLoS one. Public Library of Science (PLoS). 16(9), e0257054. eISSN 1932-6203. Available under: doi: 10.1371/journal.pone.0257054

@article{Zahn2021Verti-56085, title={Vertical sonar beam width and scanning behavior of wild belugas (Delphinapterus leucas) in West Greenland}, year={2021}, doi={10.1371/journal.pone.0257054}, number={9}, volume={16}, journal={PLoS one}, author={Zahn, Marie J. and Laidre, Kristin L. and Stilz, Peter and Rasmussen, Marianne H. and Koblitz, Jens C.}, note={Article Number: e0257054} }

<rdf:RDF xmlns:dcterms="http://purl.org/dc/terms/" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:bibo="http://purl.org/ontology/bibo/" xmlns:dspace="http://digital-repositories.org/ontologies/dspace/0.1.0#" xmlns:foaf="http://xmlns.com/foaf/0.1/" xmlns:void="http://rdfs.org/ns/void#" xmlns:xsd="http://www.w3.org/2001/XMLSchema#" > <rdf:Description rdf:about="https://kops.uni-konstanz.de/rdf/resource/123456789/56085"> <dc:creator>Zahn, Marie J.</dc:creator> <dc:contributor>Zahn, Marie J.</dc:contributor> <dc:creator>Koblitz, Jens C.</dc:creator> <dcterms:isPartOf rdf:resource="https://kops.uni-konstanz.de/rdf/resource/123456789/28"/> <dcterms:available rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2022-01-10T09:13:32Z</dcterms:available> <dspace:hasBitstream rdf:resource="https://kops.uni-konstanz.de/bitstream/123456789/56085/1/Zahn_2-1oij4crm40lp41.pdf"/> <dc:language>eng</dc:language> <dcterms:rights rdf:resource="http://creativecommons.org/licenses/by/4.0/"/> <dcterms:abstract xml:lang="eng">Echolocation signals of wild beluga whales (Delphinapterus leucas) were recorded in 2013 using a vertical, linear 16-hydrophone array at two locations in the pack ice of Baffin Bay, West Greenland. Individual whales were localized for 4:42 minutes of 1:04 hours of recordings. Clicks centered on the recording equipment (i.e. on-axis clicks) were isolated to calculate sonar parameters. We report the first sonar beam estimate of in situ recordings of wild belugas with an average -3 dB asymmetrical vertical beam width of 5.4°, showing a wider ventral beam. This narrow beam width is consistent with estimates from captive belugas; however, our results indicate that beluga sonar beams may not be symmetrical and may differ in wild and captive contexts. The mean apparent source level for on-axis clicks was 212 dB pp re 1 μPa and whales were shown to vertically scan the array from 120 meters distance. Our findings support the hypothesis that highly directional sonar beams and high source levels are an evolutionary adaptation for Arctic odontocetes to reduce unwanted surface echoes from sea ice (i.e., acoustic clutter) and effectively navigate through leads in the pack ice (e.g., find breathing holes). These results provide the first baseline beluga sonar metrics from free-ranging animals using a hydrophone array and are important for acoustic programs throughout the Arctic, particularly for acoustic classification between belugas and narwhals (Monodon monoceros).</dcterms:abstract> <dc:rights>Attribution 4.0 International</dc:rights> <void:sparqlEndpoint rdf:resource="http://localhost/fuseki/dspace/sparql"/> <dc:contributor>Rasmussen, Marianne H.</dc:contributor> <dc:creator>Stilz, Peter</dc:creator> <dcterms:issued>2021</dcterms:issued> <dc:contributor>Stilz, Peter</dc:contributor> <dc:contributor>Koblitz, Jens C.</dc:contributor> <dcterms:isPartOf rdf:resource="https://kops.uni-konstanz.de/rdf/resource/123456789/43615"/> <dc:date rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2022-01-10T09:13:32Z</dc:date> <dspace:isPartOfCollection rdf:resource="https://kops.uni-konstanz.de/rdf/resource/123456789/43615"/> <dc:creator>Rasmussen, Marianne H.</dc:creator> <dspace:isPartOfCollection rdf:resource="https://kops.uni-konstanz.de/rdf/resource/123456789/28"/> <foaf:homepage rdf:resource="http://localhost:8080/jspui"/> <bibo:uri rdf:resource="https://kops.uni-konstanz.de/handle/123456789/56085"/> <dcterms:hasPart rdf:resource="https://kops.uni-konstanz.de/bitstream/123456789/56085/1/Zahn_2-1oij4crm40lp41.pdf"/> <dc:contributor>Laidre, Kristin L.</dc:contributor> <dc:creator>Laidre, Kristin L.</dc:creator> <dcterms:title>Vertical sonar beam width and scanning behavior of wild belugas (Delphinapterus leucas) in West Greenland</dcterms:title> </rdf:Description> </rdf:RDF>

Downloads since Jan 10, 2022 (Information about access statistics)

Zahn_2-1oij4crm40lp41.pdf 55

This item appears in the following Collection(s)

Attribution 4.0 International Except where otherwise noted, this item's license is described as Attribution 4.0 International

Search KOPS


Browse

My Account