In-Air Auditory Psychophysics and the Management of a Threatened Carnivore, the Polar Bear (Ursus maritimus)
Management criteria for preventing biologically-significant noise disturbance in large terrestrial mammals have not been developed based on a sound, empirical understanding of their sensory ecology. Polar bear (Ursus maritimus) maternal denning areas on the coastal plain of Alaska’s North Slope hold...
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ftcdlib:qt7mz9r42r 2023-05-15T15:09:50+02:00 In-Air Auditory Psychophysics and the Management of a Threatened Carnivore, the Polar Bear (Ursus maritimus) Owen, Megan A Bowles, Ann E 244 - 254 2011-08-26 application/pdf http://www.escholarship.org/uc/item/7mz9r42r english eng eScholarship, University of California qt7mz9r42r http://www.escholarship.org/uc/item/7mz9r42r public Owen, Megan A; & Bowles, Ann E. (2011). In-Air Auditory Psychophysics and the Management of a Threatened Carnivore, the Polar Bear (Ursus maritimus). International Journal of Comparative Psychology, 24(13), 244 - 254. UCLA: Retrieved from: http://www.escholarship.org/uc/item/7mz9r42r Life Sciences article 2011 ftcdlib 2016-04-02T18:56:18Z Management criteria for preventing biologically-significant noise disturbance in large terrestrial mammals have not been developed based on a sound, empirical understanding of their sensory ecology. Polar bear (Ursus maritimus) maternal denning areas on the coastal plain of Alaska’s North Slope hold large petroleum reserves and will be subject to increased development in the future. Anthropogenic noise could adversely affect polar bears by disrupting intra-specific communication, altering habitat use, or causing behavioral and physiological stress. However, little is known about the hearing of any large, carnivorous mammal, including bears; so, management criteria currently in use to protect denning female polar bears may or may not be proportionate and effective. As part of a comprehensive effort to develop efficient, defensible criteria we used behavioral psychoacoustic methods to test in-air hearing sensitivity of five polar bears at frequencies between 125 Hz and 31.5 kHz. Results showed best sensitivity between 8 and 14 kHz. Sensitivity declined sharply between 14 and 25 kHz, suggesting an upper limit of hearing 10-20 kHz below that of small carnivores. Low frequency sensitivity was comparable to that of the domestic dog, and a decline in functional hearing was observed at 125 Hz. Thresholds will be used to develop efficient exposure metrics, which will be needed increasingly as the Arctic is developed and effects of disturbance are intensified by anticipated declines in polar bear health and reproduction associated with climate change driven sea ice losses. Article in Journal/Newspaper Arctic Climate change Sea ice Ursus maritimus University of California: eScholarship Arctic |
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University of California: eScholarship |
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English |
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spellingShingle |
Life Sciences Owen, Megan A Bowles, Ann E In-Air Auditory Psychophysics and the Management of a Threatened Carnivore, the Polar Bear (Ursus maritimus) |
topic_facet |
Life Sciences |
description |
Management criteria for preventing biologically-significant noise disturbance in large terrestrial mammals have not been developed based on a sound, empirical understanding of their sensory ecology. Polar bear (Ursus maritimus) maternal denning areas on the coastal plain of Alaska’s North Slope hold large petroleum reserves and will be subject to increased development in the future. Anthropogenic noise could adversely affect polar bears by disrupting intra-specific communication, altering habitat use, or causing behavioral and physiological stress. However, little is known about the hearing of any large, carnivorous mammal, including bears; so, management criteria currently in use to protect denning female polar bears may or may not be proportionate and effective. As part of a comprehensive effort to develop efficient, defensible criteria we used behavioral psychoacoustic methods to test in-air hearing sensitivity of five polar bears at frequencies between 125 Hz and 31.5 kHz. Results showed best sensitivity between 8 and 14 kHz. Sensitivity declined sharply between 14 and 25 kHz, suggesting an upper limit of hearing 10-20 kHz below that of small carnivores. Low frequency sensitivity was comparable to that of the domestic dog, and a decline in functional hearing was observed at 125 Hz. Thresholds will be used to develop efficient exposure metrics, which will be needed increasingly as the Arctic is developed and effects of disturbance are intensified by anticipated declines in polar bear health and reproduction associated with climate change driven sea ice losses. |
format |
Article in Journal/Newspaper |
author |
Owen, Megan A Bowles, Ann E |
author_facet |
Owen, Megan A Bowles, Ann E |
author_sort |
Owen, Megan A |
title |
In-Air Auditory Psychophysics and the Management of a Threatened Carnivore, the Polar Bear (Ursus maritimus) |
title_short |
In-Air Auditory Psychophysics and the Management of a Threatened Carnivore, the Polar Bear (Ursus maritimus) |
title_full |
In-Air Auditory Psychophysics and the Management of a Threatened Carnivore, the Polar Bear (Ursus maritimus) |
title_fullStr |
In-Air Auditory Psychophysics and the Management of a Threatened Carnivore, the Polar Bear (Ursus maritimus) |
title_full_unstemmed |
In-Air Auditory Psychophysics and the Management of a Threatened Carnivore, the Polar Bear (Ursus maritimus) |
title_sort |
in-air auditory psychophysics and the management of a threatened carnivore, the polar bear (ursus maritimus) |
publisher |
eScholarship, University of California |
publishDate |
2011 |
url |
http://www.escholarship.org/uc/item/7mz9r42r |
op_coverage |
244 - 254 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Climate change Sea ice Ursus maritimus |
genre_facet |
Arctic Climate change Sea ice Ursus maritimus |
op_source |
Owen, Megan A; & Bowles, Ann E. (2011). In-Air Auditory Psychophysics and the Management of a Threatened Carnivore, the Polar Bear (Ursus maritimus). International Journal of Comparative Psychology, 24(13), 244 - 254. UCLA: Retrieved from: http://www.escholarship.org/uc/item/7mz9r42r |
op_relation |
qt7mz9r42r http://www.escholarship.org/uc/item/7mz9r42r |
op_rights |
public |
_version_ |
1766340940227674112 |