| Inner ear morphological correlates of ultrasonic hearing in frogs. | |
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MedLine Citation:
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PMID: 22146424 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Three species of anuran amphibians (Odorrana tormota, Odorranalivida and Huia cavitympanum) have recently been found to detect ultrasounds. We employed immunohistochemistry and confocal microscopy to examine several morphometrics of the inner ear of these ultrasonically sensitive species. We compared morphological data collected from the ultrasound-detecting species with data from Rana pipiens, a frog with a typical anuran upper cut-off frequency of ∼3 kHz. In addition, we examined the ears of two species of Lao torrent frogs, Odorranachloronota and Amolops daorum, that live in an acoustic environment approximating those of ultrasonically sensitive frogs. Our results suggest that the three ultrasound-detecting species have converged on small-scale functional modifications of the basilar papilla (BP), the high-frequency hearing organ in the frog inner ear. These modifications include: 1. reduced BP chamber volume, 2. reduced tectorial membrane mass, 3. reduced hair bundle length, and 4. reduced hair cell soma length. While none of these factors on its own could account for the US sensitivity of the inner ears of these species, the combination of these factors appears to extend their hearing bandwidth, and facilitate high-frequency/ultrasound detection. These modifications are also seen in the ears of O. chloronota, suggesting that this species is a candidate for high-frequency hearing sensitivity. These data form the foundation for future functional work probing the physiological bases of ultrasound detection by a non-mammalian ear. |
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Authors:
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Victoria S Arch; Dwayne D Simmons; Patricia M Quiñones; Albert S Feng; Jianping Jiang; Bryan L Stuart; Jun-Xian Shen; Chris Blair; Peter M Narins |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-11-25 |
Journal Detail:
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Title: Hearing research Volume: - ISSN: 1878-5891 ISO Abbreviation: - Publication Date: 2011 Nov |
Date Detail:
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Created Date: 2011-12-7 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7900445 Medline TA: Hear Res Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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Copyright © 2011. Published by Elsevier B.V. |
Affiliation:
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Abbott Vascular Inc., 3200 Lakeside Drive, Santa Clara, CA 95054 2807, USA; Department of Ecology and Evolutionary Biology, University of California, Los Angeles, Los Angeles, CA 90095, USA. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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