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Comparison of estimated 20-Hz pulse fin whale source levels from the tropical Pacific and Eastern North Atlantic Oceans to other recorded populations

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Miksis_Olds_2019_JASA_20_Hz_CC.pdf (1.758Mb)
Date
11/10/2019
Author
Miksis-Olds, Jennifer L.
Harris, Danielle V.
Heaney, Kevin D.
Keywords
QH301 Biology
3rd-DAS
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Abstract
Passive acoustic monitoring, mitigation, animal density estimation, and comprehensive understanding of the impact of sound on marine animals all require accurate information on vocalization source level to be most effective. This study focused on examining the uncertainty related to passive sonar equation terms that ultimately contribute to the variability observed in estimated source levels of fin whale calls. Differences in hardware configuration, signal detection methods, sample size, location, and time were considered in interpreting the variability of estimated fin whale source levels. Data from Wake Island in the Pacific Ocean and off Portugal in the Atlantic Ocean provided the opportunity to generate large datasets of estimated source levels to better understand sources of uncertainty leading to the observed variability with and across years. Average seasonal source levels from the Wake Island dataset ranged from 175 to 188 dB re 1 μPa m, while the 2007–2008 seasonal average detected off Portugal was 189 dB re 1 μPa m. Owing to the large inherent variability within and across this and other studies that potentially masks true differences between populations, there is no evidence to conclude that the source level of 20-Hz fin whale calls are regionally or population specific.
Citation
Miksis-Olds , J L , Harris , D V & Heaney , K D 2019 , ' Comparison of estimated 20-Hz pulse fin whale source levels from the tropical Pacific and Eastern North Atlantic Oceans to other recorded populations ' , Journal of the Acoustical Society of America , vol. 146 , no. 4 , pp. 2373-2384 . https://doi.org/10.1121/1.5126692
Publication
Journal of the Acoustical Society of America
Status
Peer reviewed
DOI
https://doi.org/10.1121/1.5126692
ISSN
0001-4966
Type
Journal article
Rights
Copyright © 2019 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Description
D.H. was funded by the Office of Naval Research (Award: N00014-16-1-2364). J.M.O. was funded under Award: N00014-16-1-2860 also from the Office of Naval Research.
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  • University of St Andrews Research
URI
http://hdl.handle.net/10023/18854

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