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A dive counting density estimation method for Blainville's beaked whale (Mesoplodon densirostris) using a bottom-mounted hydrophone field as applied to a Mid-Frequency Active (MFA) sonar operation

Research output: Research - peer-reviewArticle

DOI

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A dive counting density estimation method for Blainville's beaked whale (Mesoplodon densirostris) using a bottom-mounted hydrophone field as applied to a Mid-Frequency Active (MFA) sonar operation. / Moretti, D.; Marques, Tiago Andre Lamas Oliveira; Thomas, L.; DiMarzio, N.; Dilley, A.; Morrissey, R.; McCarthy, E.; Ward, J.; Jarvis, S.

In: Applied Acoustics , Vol. 71, No. 11, 11.2010, p. 1036-1042.

Research output: Research - peer-reviewArticle

Harvard

Moretti, D, Marques, TALO, Thomas, L, DiMarzio, N, Dilley, A, Morrissey, R, McCarthy, E, Ward, J & Jarvis, S 2010, 'A dive counting density estimation method for Blainville's beaked whale (Mesoplodon densirostris) using a bottom-mounted hydrophone field as applied to a Mid-Frequency Active (MFA) sonar operation' Applied Acoustics , vol 71, no. 11, pp. 1036-1042. DOI: 10.1016/j.apacoust.2010.04.011

APA

Moretti, D., Marques, T. A. L. O., Thomas, L., DiMarzio, N., Dilley, A., Morrissey, R., ... Jarvis, S. (2010). A dive counting density estimation method for Blainville's beaked whale (Mesoplodon densirostris) using a bottom-mounted hydrophone field as applied to a Mid-Frequency Active (MFA) sonar operation. Applied Acoustics , 71(11), 1036-1042. DOI: 10.1016/j.apacoust.2010.04.011

Vancouver

Moretti D, Marques TALO, Thomas L, DiMarzio N, Dilley A, Morrissey R et al. A dive counting density estimation method for Blainville's beaked whale (Mesoplodon densirostris) using a bottom-mounted hydrophone field as applied to a Mid-Frequency Active (MFA) sonar operation. Applied Acoustics . 2010 Nov;71(11):1036-1042. Available from, DOI: 10.1016/j.apacoust.2010.04.011

Author

Moretti, D. ; Marques, Tiago Andre Lamas Oliveira ; Thomas, L. ; DiMarzio, N. ; Dilley, A. ; Morrissey, R. ; McCarthy, E. ; Ward, J. ; Jarvis, S./ A dive counting density estimation method for Blainville's beaked whale (Mesoplodon densirostris) using a bottom-mounted hydrophone field as applied to a Mid-Frequency Active (MFA) sonar operation. In: Applied Acoustics . 2010 ; Vol. 71, No. 11. pp. 1036-1042

Bibtex - Download

@article{23d73c58adeb474785d26fdf84ec144d,
title = "A dive counting density estimation method for Blainville's beaked whale (Mesoplodon densirostris) using a bottom-mounted hydrophone field as applied to a Mid-Frequency Active (MFA) sonar operation",
abstract = "We present a passive acoustic method for estimating the density of echolocating cetaceans that dive synchronously, based on isolation of dive starts using a field of distributed bottom-mounted hydrophones. The method assumes that all dive starts of the target species within a defined area are detected, and that independent estimates of dive rate and group size are available. We apply the method to estimate the density of Blainville’s beaked whales (Mesoplodon densirostris) at the Atlantic Undersea Test and Evaluation Center (AUTEC) in the Bahamas during the time of a multi-ship active sonar exercise. Estimated densities for the 65 h before the exercise, 68 h during, 65 h after, and the final 43 h monitored were 16.99 (95% CI 13.47–21.43), 4.76 (3.78–6.00), 8.67 (6.87–10.94), and 24.75 (19.62–31.23) respectively, illustrating a possible avoidance reaction. Results for the 65 h before were compared with those from the click count density estimation algorithm developed by Marques et al. [Marques T, Thomas L, Ward J, DiMarzio N, Tyack P. Estimating cetacean population density using fixed passive acoustic sensors. An example with Blainville’s beaked whales. J Acoust Soc Am 2009;125(4):1982–1994]. The click count-based estimate was 19.23 animals/1000 km2 (95% CI 12.69–29.13)—similar (13% higher), but with higher variance (CV 21% for click count method versus 12% for the dive count method). We discuss potential reasons for the differences, and compare the utility of the two methods. For both, obtaining reliable estimates of the factors that scale the measured quantity (dive starts or detected clicks) to density is the key hurdle. Defining the area monitored in the dive count method can also be problematic, particularly if the array is small.",
keywords = "Bioacoustics, Cue counting, Estimating animal abundance, Passive acoustic monitoring",
author = "D. Moretti and Marques, {Tiago Andre Lamas Oliveira} and L. Thomas and N. DiMarzio and A. Dilley and R. Morrissey and E. McCarthy and J. Ward and S. Jarvis",
year = "2010",
month = "11",
doi = "10.1016/j.apacoust.2010.04.011",
volume = "71",
pages = "1036--1042",
journal = "Applied Acoustics",
issn = "0003-682X",
publisher = "Elsevier",
number = "11",

}

RIS (suitable for import to EndNote) - Download

TY - JOUR

T1 - A dive counting density estimation method for Blainville's beaked whale (Mesoplodon densirostris) using a bottom-mounted hydrophone field as applied to a Mid-Frequency Active (MFA) sonar operation

AU - Moretti,D.

AU - Marques,Tiago Andre Lamas Oliveira

AU - Thomas,L.

AU - DiMarzio,N.

AU - Dilley,A.

AU - Morrissey,R.

AU - McCarthy,E.

AU - Ward,J.

AU - Jarvis,S.

PY - 2010/11

Y1 - 2010/11

N2 - We present a passive acoustic method for estimating the density of echolocating cetaceans that dive synchronously, based on isolation of dive starts using a field of distributed bottom-mounted hydrophones. The method assumes that all dive starts of the target species within a defined area are detected, and that independent estimates of dive rate and group size are available. We apply the method to estimate the density of Blainville’s beaked whales (Mesoplodon densirostris) at the Atlantic Undersea Test and Evaluation Center (AUTEC) in the Bahamas during the time of a multi-ship active sonar exercise. Estimated densities for the 65 h before the exercise, 68 h during, 65 h after, and the final 43 h monitored were 16.99 (95% CI 13.47–21.43), 4.76 (3.78–6.00), 8.67 (6.87–10.94), and 24.75 (19.62–31.23) respectively, illustrating a possible avoidance reaction. Results for the 65 h before were compared with those from the click count density estimation algorithm developed by Marques et al. [Marques T, Thomas L, Ward J, DiMarzio N, Tyack P. Estimating cetacean population density using fixed passive acoustic sensors. An example with Blainville’s beaked whales. J Acoust Soc Am 2009;125(4):1982–1994]. The click count-based estimate was 19.23 animals/1000 km2 (95% CI 12.69–29.13)—similar (13% higher), but with higher variance (CV 21% for click count method versus 12% for the dive count method). We discuss potential reasons for the differences, and compare the utility of the two methods. For both, obtaining reliable estimates of the factors that scale the measured quantity (dive starts or detected clicks) to density is the key hurdle. Defining the area monitored in the dive count method can also be problematic, particularly if the array is small.

AB - We present a passive acoustic method for estimating the density of echolocating cetaceans that dive synchronously, based on isolation of dive starts using a field of distributed bottom-mounted hydrophones. The method assumes that all dive starts of the target species within a defined area are detected, and that independent estimates of dive rate and group size are available. We apply the method to estimate the density of Blainville’s beaked whales (Mesoplodon densirostris) at the Atlantic Undersea Test and Evaluation Center (AUTEC) in the Bahamas during the time of a multi-ship active sonar exercise. Estimated densities for the 65 h before the exercise, 68 h during, 65 h after, and the final 43 h monitored were 16.99 (95% CI 13.47–21.43), 4.76 (3.78–6.00), 8.67 (6.87–10.94), and 24.75 (19.62–31.23) respectively, illustrating a possible avoidance reaction. Results for the 65 h before were compared with those from the click count density estimation algorithm developed by Marques et al. [Marques T, Thomas L, Ward J, DiMarzio N, Tyack P. Estimating cetacean population density using fixed passive acoustic sensors. An example with Blainville’s beaked whales. J Acoust Soc Am 2009;125(4):1982–1994]. The click count-based estimate was 19.23 animals/1000 km2 (95% CI 12.69–29.13)—similar (13% higher), but with higher variance (CV 21% for click count method versus 12% for the dive count method). We discuss potential reasons for the differences, and compare the utility of the two methods. For both, obtaining reliable estimates of the factors that scale the measured quantity (dive starts or detected clicks) to density is the key hurdle. Defining the area monitored in the dive count method can also be problematic, particularly if the array is small.

KW - Bioacoustics

KW - Cue counting

KW - Estimating animal abundance

KW - Passive acoustic monitoring

U2 - 10.1016/j.apacoust.2010.04.011

DO - 10.1016/j.apacoust.2010.04.011

M3 - Article

VL - 71

SP - 1036

EP - 1042

JO - Applied Acoustics

T2 - Applied Acoustics

JF - Applied Acoustics

SN - 0003-682X

IS - 11

ER -

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ID: 3401926