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dc.contributor.authorOwen, Megan A.
dc.contributor.authorAE, Bowles
dc.date.accessioned2021-03-05T20:54:47Z
dc.date.available2021-03-05T20:54:47Z
dc.date.issued2011
dc.identifier.urihttp://hdl.handle.net/20.500.12634/899
dc.description.abstractManagement 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 psycho acousticmethods to test in-air hearing sensitivity of five polar bears at frequencies between 125 Hz and 31.5kHz. Results showed best sensitivity between 8 and 14 kHz. Sensitivity declined sharply between 14and 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 hearingwas 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.
dc.description.sponsorship
dc.language.isoen
dc.relation.urlhttps://cloudfront.escholarship.org/dist/prd/content/qt7mz9r42r/qt7mz9r42r.pdf
dc.rightsCopyright 2011 by the International Society for Comparative Psychology. The International Journal of Comparative Psychology is sponsored by the International Society for Comparative Psychology. It is a peer-reviewed open-access digital journal that publishes studies on the evolution and development of behavior in all animal species. It accepts research articles and reviews, letters and audiovisual submissions.
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectPOLAR BEARS
dc.subjectPARENTING
dc.subjectANIMAL-HUMAN RELATIONSHIPS
dc.subjectCOMMUNICATION
dc.subjectHABITATS
dc.subjectECOSYSTEMS
dc.subjectSTRESS
dc.subjectHEARING
dc.subjectWILDLIFE MANAGEMENT
dc.subjectARCTIC
dc.subjectANIMAL ECOLOGY
dc.subjectREPRODUCTION
dc.subjectHEALTH
dc.subjectCLIMATE
dc.titleIn-air auditory psychophysics and the management of a threatened carnivore, the polar bear (Ursus maritimus)
dc.typeArticle
dc.source.journaltitleInternational Journal of Comparative Psychology
dc.source.volume24
dc.source.beginpage244
dc.source.endpage254
html.description.abstractManagement 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 psycho acousticmethods to test in-air hearing sensitivity of five polar bears at frequencies between 125 Hz and 31.5kHz. Results showed best sensitivity between 8 and 14 kHz. Sensitivity declined sharply between 14and 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 hearingwas 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.


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    Peer reviewed and scientific works by San Diego Zoo Wildlife Alliance staff. Includes books, book sections, articles and conference publications and presentations.

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Copyright 2011 by the International Society for Comparative Psychology.  The International Journal of Comparative Psychology is sponsored by the International Society for Comparative Psychology. It is a peer-reviewed open-access digital journal that publishes studies on the evolution and development of behavior in all animal species. It accepts research articles and reviews, letters and audiovisual submissions.
Except where otherwise noted, this item's license is described as Copyright 2011 by the International Society for Comparative Psychology. The International Journal of Comparative Psychology is sponsored by the International Society for Comparative Psychology. It is a peer-reviewed open-access digital journal that publishes studies on the evolution and development of behavior in all animal species. It accepts research articles and reviews, letters and audiovisual submissions.