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Acoustic behavior of beaked whales, with implications for acoustic monitoring

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Standard

Acoustic behavior of beaked whales, with implications for acoustic monitoring. / Tyack, Peter L.; Johnson, Mark P.; Zimmer, Walter M. X.; de Soto, Natacha Aguilar; Madsen, Peter T.

OCEANS 2006, VOLS 1-4. NEW YORK : IEEE, 2006. p. 509-514 (OCEANS-IEEE).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Harvard

Tyack, PL, Johnson, MP, Zimmer, WMX, de Soto, NA & Madsen, PT 2006, Acoustic behavior of beaked whales, with implications for acoustic monitoring. in OCEANS 2006, VOLS 1-4. OCEANS-IEEE, IEEE, NEW YORK, pp. 509-514, Oceans 2006 Conference, Boston, Morocco, 18/09/06.

APA

Tyack, P. L., Johnson, M. P., Zimmer, W. M. X., de Soto, N. A., & Madsen, P. T. (2006). Acoustic behavior of beaked whales, with implications for acoustic monitoring. In OCEANS 2006, VOLS 1-4 (pp. 509-514). (OCEANS-IEEE). NEW YORK: IEEE.

Vancouver

Tyack PL, Johnson MP, Zimmer WMX, de Soto NA, Madsen PT. Acoustic behavior of beaked whales, with implications for acoustic monitoring. In OCEANS 2006, VOLS 1-4. NEW YORK: IEEE. 2006. p. 509-514. (OCEANS-IEEE).

Author

Tyack, Peter L. ; Johnson, Mark P. ; Zimmer, Walter M. X. ; de Soto, Natacha Aguilar ; Madsen, Peter T. / Acoustic behavior of beaked whales, with implications for acoustic monitoring. OCEANS 2006, VOLS 1-4. NEW YORK : IEEE, 2006. pp. 509-514 (OCEANS-IEEE).

Bibtex - Download

@inproceedings{a94a6f7529d34cf681611001883b6130,
title = "Acoustic behavior of beaked whales, with implications for acoustic monitoring",
abstract = "Beaked whales (Cetacea: Ziphiidea) of the genera Ziphius and Mesoplodon have been reported to mass strand during naval sonar exercises, and the ability to mitigate such negative effects is of increasing importance. Beaked whales dive for long periods and am. difficult to sight at the surface. We discuss new results suggesting that passive acoustic monitoring for beaked whales holds promise for detecting their presence. A new non-invasive acoustic recording tag was attached to beaked whales of two species, 3 Mesoplodon densirostris and 7 Ziphius cavirostris. High-frequency clicks were recorded for about 30 min every 2-4 hours during deep dives of all tagged whales. The tagged whales only clicked at depths below 200 in, down to a maximum depth near 2000 in. During each foraging dive, both species produced thousands of directional, ultrasonic clicks with no significant energy below 20 kHz. The clicks are produced in trains with mean interclick intervals near 0.4 s. Individual clicks are frequency modulated pulses with durations of 200-300 mu sec and center frequencies around 40 kHz, -10 dB bandwidths of 20-30 kHz. The sound beam for Ziphius is narrow with an estimated directionality index of more than 25 dB, source levels up to 214 dBpp re 1 mu Pa at 1 m. Given knowledge of the source level, frequency range, and directionality of beaked whale clicks, along with the precise orientation and location of beaked whales clicking during foraging dives, it is possible to model the {"}acoustic footprint{"} of foraging dives. These data can be used to estimate the probability of detecting the presence of beaked whales by listening. Critical parameters include the density of sensors and the listening time needed to achieve adequate detection probability. Using the observed dive behavior of K, tagged beaked whales of genera Ziphius and Mesoplodon, we worked with the NATO Undersea Research Center to develop a simulation of detector performance for arrays of hydrophones at variable depths between 100 and 1400 in. We demonstrate that for continuous listening for at least the 2-4 hour interval between the start of deep dives, high detection probability could be achieved with acoustic sensors spaced a few km apart. The greatest problem for beaked whale detectors is likely to be false alarms from biological and physical acoustic transients (such as dolphin clicks), and monitoring efforts will need to trade off probability of false alarm against maximizing detection probability. While results may be somewhat poorer in realistic noise conditions and with practical detectors, there appears to be considerable potential for the acoustic detection of beaked",
author = "Tyack, {Peter L.} and Johnson, {Mark P.} and Zimmer, {Walter M. X.} and {de Soto}, {Natacha Aguilar} and Madsen, {Peter T.}",
year = "2006",
language = "English",
isbn = "978-1-4244-0114-7",
series = "OCEANS-IEEE",
publisher = "IEEE",
pages = "509--514",
booktitle = "OCEANS 2006, VOLS 1-4",

}

RIS (suitable for import to EndNote) - Download

TY - GEN

T1 - Acoustic behavior of beaked whales, with implications for acoustic monitoring

AU - Tyack, Peter L.

AU - Johnson, Mark P.

AU - Zimmer, Walter M. X.

AU - de Soto, Natacha Aguilar

AU - Madsen, Peter T.

PY - 2006

Y1 - 2006

N2 - Beaked whales (Cetacea: Ziphiidea) of the genera Ziphius and Mesoplodon have been reported to mass strand during naval sonar exercises, and the ability to mitigate such negative effects is of increasing importance. Beaked whales dive for long periods and am. difficult to sight at the surface. We discuss new results suggesting that passive acoustic monitoring for beaked whales holds promise for detecting their presence. A new non-invasive acoustic recording tag was attached to beaked whales of two species, 3 Mesoplodon densirostris and 7 Ziphius cavirostris. High-frequency clicks were recorded for about 30 min every 2-4 hours during deep dives of all tagged whales. The tagged whales only clicked at depths below 200 in, down to a maximum depth near 2000 in. During each foraging dive, both species produced thousands of directional, ultrasonic clicks with no significant energy below 20 kHz. The clicks are produced in trains with mean interclick intervals near 0.4 s. Individual clicks are frequency modulated pulses with durations of 200-300 mu sec and center frequencies around 40 kHz, -10 dB bandwidths of 20-30 kHz. The sound beam for Ziphius is narrow with an estimated directionality index of more than 25 dB, source levels up to 214 dBpp re 1 mu Pa at 1 m. Given knowledge of the source level, frequency range, and directionality of beaked whale clicks, along with the precise orientation and location of beaked whales clicking during foraging dives, it is possible to model the "acoustic footprint" of foraging dives. These data can be used to estimate the probability of detecting the presence of beaked whales by listening. Critical parameters include the density of sensors and the listening time needed to achieve adequate detection probability. Using the observed dive behavior of K, tagged beaked whales of genera Ziphius and Mesoplodon, we worked with the NATO Undersea Research Center to develop a simulation of detector performance for arrays of hydrophones at variable depths between 100 and 1400 in. We demonstrate that for continuous listening for at least the 2-4 hour interval between the start of deep dives, high detection probability could be achieved with acoustic sensors spaced a few km apart. The greatest problem for beaked whale detectors is likely to be false alarms from biological and physical acoustic transients (such as dolphin clicks), and monitoring efforts will need to trade off probability of false alarm against maximizing detection probability. While results may be somewhat poorer in realistic noise conditions and with practical detectors, there appears to be considerable potential for the acoustic detection of beaked

AB - Beaked whales (Cetacea: Ziphiidea) of the genera Ziphius and Mesoplodon have been reported to mass strand during naval sonar exercises, and the ability to mitigate such negative effects is of increasing importance. Beaked whales dive for long periods and am. difficult to sight at the surface. We discuss new results suggesting that passive acoustic monitoring for beaked whales holds promise for detecting their presence. A new non-invasive acoustic recording tag was attached to beaked whales of two species, 3 Mesoplodon densirostris and 7 Ziphius cavirostris. High-frequency clicks were recorded for about 30 min every 2-4 hours during deep dives of all tagged whales. The tagged whales only clicked at depths below 200 in, down to a maximum depth near 2000 in. During each foraging dive, both species produced thousands of directional, ultrasonic clicks with no significant energy below 20 kHz. The clicks are produced in trains with mean interclick intervals near 0.4 s. Individual clicks are frequency modulated pulses with durations of 200-300 mu sec and center frequencies around 40 kHz, -10 dB bandwidths of 20-30 kHz. The sound beam for Ziphius is narrow with an estimated directionality index of more than 25 dB, source levels up to 214 dBpp re 1 mu Pa at 1 m. Given knowledge of the source level, frequency range, and directionality of beaked whale clicks, along with the precise orientation and location of beaked whales clicking during foraging dives, it is possible to model the "acoustic footprint" of foraging dives. These data can be used to estimate the probability of detecting the presence of beaked whales by listening. Critical parameters include the density of sensors and the listening time needed to achieve adequate detection probability. Using the observed dive behavior of K, tagged beaked whales of genera Ziphius and Mesoplodon, we worked with the NATO Undersea Research Center to develop a simulation of detector performance for arrays of hydrophones at variable depths between 100 and 1400 in. We demonstrate that for continuous listening for at least the 2-4 hour interval between the start of deep dives, high detection probability could be achieved with acoustic sensors spaced a few km apart. The greatest problem for beaked whale detectors is likely to be false alarms from biological and physical acoustic transients (such as dolphin clicks), and monitoring efforts will need to trade off probability of false alarm against maximizing detection probability. While results may be somewhat poorer in realistic noise conditions and with practical detectors, there appears to be considerable potential for the acoustic detection of beaked

M3 - Conference contribution

SN - 978-1-4244-0114-7

T3 - OCEANS-IEEE

SP - 509

EP - 514

BT - OCEANS 2006, VOLS 1-4

PB - IEEE

CY - NEW YORK

ER -

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ID: 49760944