A single-hydrophone ocean glider was deployed within a cabled hydrophone array to demonstrate a framework for estimating population density of fin whales (Balaenoptera physalus) from a passive acoustic glider. The array was used to estimate tracks of acoustically active whales. These tracks became detection trials to model the detection function for glider-recorded 360-s windows containing fin whale 20-Hz pulses using a generalized additive model. Detection probability was dependent on both horizontal distance and low-frequency glider flow noise. At the median 40-Hz spectral level of 97 dB re 1 μPa2/Hz, detection probability was near one at horizontal distance zero with an effective detection radius of 17.1 km [coefficient of variation (CV) = 0.13]. Using estimates of acoustic availability and acoustically active group size from tagged and tracked fin whales, respectively, density of fin whales was estimated as 1.8 whales per 1000 km2 (CV = 0.55). A plot sampling density estimate for the same area and time, estimated from array data alone, was 1.3 whales per 1000 km2 (CV = 0.51). While the presented density estimates are from a small demonstration experiment and should be used with caution, the framework presented here advances our understanding of the potential use of gliders for cetacean density estimation.
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October 2022
October 21 2022
Detection probability and density estimation of fin whales by a Seaglider
Selene Fregosi
;
Selene Fregosi
a)
1
Cooperative Institute for Marine Ecosystem and Resources Studies, Oregon State University and National Oceanic and Atmospheric Administration Pacific Marine Environmental Laboratory
, 2030 Southeast Marine Science Drive, Newport, Oregon 97365, USA
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Danielle V. Harris
;
Danielle V. Harris
2
Centre for Research into Ecological and Environmental Modelling, University of St Andrews
, St Andrews, Fife KY16 9LZ, United Kingdom
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Haruyoshi Matsumoto;
Haruyoshi Matsumoto
1
Cooperative Institute for Marine Ecosystem and Resources Studies, Oregon State University and National Oceanic and Atmospheric Administration Pacific Marine Environmental Laboratory
, 2030 Southeast Marine Science Drive, Newport, Oregon 97365, USA
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David K. Mellinger
;
David K. Mellinger
1
Cooperative Institute for Marine Ecosystem and Resources Studies, Oregon State University and National Oceanic and Atmospheric Administration Pacific Marine Environmental Laboratory
, 2030 Southeast Marine Science Drive, Newport, Oregon 97365, USA
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Stephen W. Martin;
Stephen W. Martin
3
National Marine Mammal Foundation
, San Diego, California 92106, USA
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Brian Matsuyama;
Brian Matsuyama
3
National Marine Mammal Foundation
, San Diego, California 92106, USA
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Jay Barlow
;
Jay Barlow
4
Marine Mammal and Turtle Division, Southwest Fisheries Science Center, National Oceanic and Atmospheric Administration National Marine Fisheries Service
, La Jolla, California 92037, USA
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Holger Klinck
Holger Klinck
b)
5
K. Lisa Yang Center for Conservation Bioacoustics, Cornell Lab of Ornithology, Cornell University
, Ithaca, New York 14850, USA
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a)
Electronic mail: [email protected]
b)
Also at: Marine Mammal Institute, Department of Fisheries Wildlife and Conservation, Oregon State University, Newport, OR 97365, USA.
J. Acoust. Soc. Am. 152, 2277–2291 (2022)
Article history
Received:
October 10 2021
Accepted:
September 23 2022
Citation
Selene Fregosi, Danielle V. Harris, Haruyoshi Matsumoto, David K. Mellinger, Stephen W. Martin, Brian Matsuyama, Jay Barlow, Holger Klinck; Detection probability and density estimation of fin whales by a Seaglider. J. Acoust. Soc. Am. 1 October 2022; 152 (4): 2277–2291. https://doi.org/10.1121/10.0014793
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