Conductive hearing loss in bighorn sheep.

L. W. Norrix; D. W. DeYoung; P. R. Krausman; R. C. Etchberger; T. J. Glattke

doi:10.7589/0090-3558-31.2.223

Conductive hearing loss in bighorn sheep.

L. W. Norrix, D. W. DeYoung, P. R. Krausman, R. C. Etchberger, T. J. Glattke

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Abstract

In January 1993 we simulated a conductive hearing loss in three Mexican bighorn sheep (Ovis canadensis mexicana) by placing bone wax or saline solution in their ear canals. Our objective was to test whether lesions of the external auditory canal caused by psoroptic mites (Psoroptes ovis) may lead to conductive hearing loss in bighorn sheep. We assessed the effects of these manipulations using the auditory brainstem response test. Placing saline solution in the external auditory canal, which loads the tympanic membrane, had a more dramatic effect on the auditory brainstem response than did bone wax. We propose that decreased hearing sensitivity or alterations in resonance characteristics of the external auditory canal, due to psoroptic scabies lesions, may make bighorn sheep more susceptible to predation.

Original language	English (US)
Pages (from-to)	223-227
Number of pages	5
Journal	Journal of wildlife diseases
Volume	31
Issue number	2
DOIs	https://doi.org/10.7589/0090-3558-31.2.223
State	Published - Apr 1995
Externally published	Yes

ASJC Scopus subject areas

Ecology, Evolution, Behavior and Systematics
Ecology

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10.7589/0090-3558-31.2.223

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abstract = "In January 1993 we simulated a conductive hearing loss in three Mexican bighorn sheep (Ovis canadensis mexicana) by placing bone wax or saline solution in their ear canals. Our objective was to test whether lesions of the external auditory canal caused by psoroptic mites (Psoroptes ovis) may lead to conductive hearing loss in bighorn sheep. We assessed the effects of these manipulations using the auditory brainstem response test. Placing saline solution in the external auditory canal, which loads the tympanic membrane, had a more dramatic effect on the auditory brainstem response than did bone wax. We propose that decreased hearing sensitivity or alterations in resonance characteristics of the external auditory canal, due to psoroptic scabies lesions, may make bighorn sheep more susceptible to predation.",

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AU - Glattke, T. J.

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Conductive hearing loss in bighorn sheep.

Abstract

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