The impact of multibeam echosounder (MBES) operations on marine mammals has been less studied compared to military sonars. To contribute to the growing body of MBES knowledge, echolocation clicks of foraging Cuvier's beaked whales were detected on the Southern California Antisubmarine Warfare Range (SOAR) hydrophones during two MBES surveys and assembled into foraging events called group vocal periods (GVPs). Four GVP characteristics were analyzed Before, During, and After 12 kHz MBES surveys at the SOAR in 2017 and 2019 to assess differences in foraging behavior with respect to the mapping activity. The number of GVP per hour increased During and After MBES surveys compared with Before. There were no other differences between non-MBES and MBES periods for the three other characteristics: the number of clicks per GVP, GVP duration, and click rate. These results indicate that there was not a consistent change in foraging behavior during the MBES surveys that would suggest a clear response. The animals did not leave the range nor stop foraging during MBES activity. These results are in stark contrast to those of analogous studies assessing the effect of Naval mid-frequency active sonar on beaked whale foraging, where beaked whales stopped echolocating and left the area.
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June 2020
June 11 2020
The effect of two 12 kHz multibeam mapping surveys on the foraging behavior of Cuvier's beaked whales off of southern Californiaa) Available to Purchase
Special Collection:
The Effects of Noise on Aquatic Life
Hilary Kates Varghese;
Hilary Kates Varghese
b)
1
Center for Coastal and Ocean Mapping, University of New Hampshire
, 24 Colovos Road, Durham New Hamshire 03824, USA
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Jennifer Miksis-Olds
;
Jennifer Miksis-Olds
c)
1
Center for Coastal and Ocean Mapping, University of New Hampshire
, 24 Colovos Road, Durham New Hamshire 03824, USA
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Nancy DiMarzio;
Nancy DiMarzio
2
Ranges, Engineering and Analysis Department, Naval Undersea Warfare Center
, Newport, Rhode Island 02840, USA
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Kim Lowell;
Kim Lowell
1
Center for Coastal and Ocean Mapping, University of New Hampshire
, 24 Colovos Road, Durham New Hamshire 03824, USA
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Ernst Linder;
Ernst Linder
3
Department of Mathematics and Statistics, University of New Hampshire
, 33 Academic Way Durham, New Hampshire 03824, USA
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Larry Mayer;
Larry Mayer
1
Center for Coastal and Ocean Mapping, University of New Hampshire
, 24 Colovos Road, Durham New Hamshire 03824, USA
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David Moretti
David Moretti
d)
2
Ranges, Engineering and Analysis Department, Naval Undersea Warfare Center
, Newport, Rhode Island 02840, USA
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Hilary Kates Varghese
1,b)
Jennifer Miksis-Olds
1,c)
Nancy DiMarzio
2
Kim Lowell
1
Ernst Linder
3
Larry Mayer
1
David Moretti
2,d)
1
Center for Coastal and Ocean Mapping, University of New Hampshire
, 24 Colovos Road, Durham New Hamshire 03824, USA
2
Ranges, Engineering and Analysis Department, Naval Undersea Warfare Center
, Newport, Rhode Island 02840, USA
3
Department of Mathematics and Statistics, University of New Hampshire
, 33 Academic Way Durham, New Hampshire 03824, USA
b)
Electronic mail: [email protected]
c)
Also at: Center for Acoustics Research and Education, University of New Hampshire, 24 Colovos Road, Durham, NH 03824, USA. ORCID: 0000-0003-1784-6849.
d)
Retired from the Ranges, Engineering and Analysis Department, Naval Undersea Warfare Center.
a)
This paper is part of a special issue on The effects of Noise on Aquatic Life.
J. Acoust. Soc. Am. 147, 3849–3858 (2020)
Article history
Received:
December 06 2019
Accepted:
May 17 2020
Citation
Hilary Kates Varghese, Jennifer Miksis-Olds, Nancy DiMarzio, Kim Lowell, Ernst Linder, Larry Mayer, David Moretti; The effect of two 12 kHz multibeam mapping surveys on the foraging behavior of Cuvier's beaked whales off of southern California. J. Acoust. Soc. Am. 1 June 2020; 147 (6): 3849–3858. https://doi.org/10.1121/10.0001385
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