Evidence for an Auditory Fovea in the New Zealand Kiwi (Apteryx mantelli)

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dc.contributor.author Corfield, J en
dc.contributor.author Kubke, Maria en
dc.contributor.author Parsons, Stuart en
dc.contributor.author Wild, John en
dc.contributor.author Köppl, C en
dc.coverage.spatial United States en
dc.date.accessioned 2011-09-19T00:47:00Z en
dc.date.accessioned 2011-10-25T01:51:04Z en
dc.date.issued 2011 en
dc.identifier.citation PLoS One 6(8):e23771 2011 en
dc.identifier.issn 1932-6203 en
dc.identifier.uri http://hdl.handle.net/2292/8365 en
dc.description.abstract Kiwi are rare and strictly protected birds of iconic status in New Zealand. Yet, perhaps due to their unusual, nocturnal lifestyle, surprisingly little is known about their behaviour or physiology. In the present study, we exploited known correlations between morphology and physiology in the avian inner ear and brainstem to predict the frequency range of best hearing in the North Island brown kiwi. The mechanosensitive hair bundles of the sensory hair cells in the basilar papilla showed the typical change from tall bundles with few stereovilli to short bundles with many stereovilli along the apical-to-basal tonotopic axis. In contrast to most birds, however, the change was considerably less in the basal half of the epithelium. Dendritic lengths in the brainstem nucleus laminaris also showed the typical change along the tonotopic axis. However, as in the basilar papilla, the change was much less pronounced in the presumed high-frequency regions. Together, these morphological data suggest a fovea-like overrepresentation of a narrow high-frequency band in kiwi. Based on known correlations of hair-cell microanatomy and physiological responses in other birds, a specific prediction for the frequency representation along the basilar papilla of the kiwi was derived. The predicted overrepresentation of approximately 4-6 kHz matches potentially salient frequency bands of kiwi vocalisations and may thus be an adaptation to a nocturnal lifestyle in which auditory communication plays a dominant role. en
dc.language eng en
dc.publisher PLoS One en
dc.relation.ispartofseries PLOS ONE en
dc.relation.replaces http://hdl.handle.net/2292/8052 en
dc.relation.replaces 2292/8052 en
dc.rights Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. Details obtained from http://www.sherpa.ac.uk/romeo/issn/1932-6203/ en
dc.rights.uri https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm en
dc.rights.uri http://creativecommons.org/licenses/by-nc-sa/3.0/ en
dc.title Evidence for an Auditory Fovea in the New Zealand Kiwi (Apteryx mantelli) en
dc.type Journal Article en
dc.identifier.doi 10.1371/journal.pone.0023771 en
pubs.issue 8 en
pubs.begin-page e23771 en
pubs.volume 6 en
dc.rights.holder Copyright: 2011 Corfield et al. en
dc.identifier.pmid 21887317 en
pubs.publication-status Published en
dc.rights.accessrights http://purl.org/eprint/accessRights/OpenAccess en
pubs.subtype Article en
pubs.elements-id 225000 en
pubs.org-id Medical and Health Sciences en
pubs.org-id Medical Sciences en
pubs.org-id Anatomy and Medical Imaging en
dc.identifier.eissn 1932-6203 en
dc.identifier.pii PONE-D-11-05848 en
pubs.record-created-at-source-date 2011-10-10 en
pubs.dimensions-id 21887317 en

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