Evidence for an auditory fovea in the New Zealand kiwi (Apteryx mantelli).

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 i...

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Autores principales:	Jeremy Corfield, M Fabiana Kubke, Stuart Parsons, J Martin Wild, Christine Köppl
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2011
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/d8cff0d289db4c2c83791a243dc0e1ba
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spelling	oai:doaj.org-article:d8cff0d289db4c2c83791a243dc0e1ba2021-11-18T06:47:20ZEvidence for an auditory fovea in the New Zealand kiwi (Apteryx mantelli).1932-620310.1371/journal.pone.0023771https://doaj.org/article/d8cff0d289db4c2c83791a243dc0e1ba2011-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/21887317/?tool=EBIhttps://doaj.org/toc/1932-6203Kiwi 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.Jeremy CorfieldM Fabiana KubkeStuart ParsonsJ Martin WildChristine KöpplPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 6, Iss 8, p e23771 (2011)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Jeremy Corfield M Fabiana Kubke Stuart Parsons J Martin Wild Christine Köppl Evidence for an auditory fovea in the New Zealand kiwi (Apteryx mantelli).
description	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.
format	article
author	Jeremy Corfield M Fabiana Kubke Stuart Parsons J Martin Wild Christine Köppl
author_facet	Jeremy Corfield M Fabiana Kubke Stuart Parsons J Martin Wild Christine Köppl
author_sort	Jeremy Corfield
title	Evidence for an auditory fovea in the New Zealand kiwi (Apteryx mantelli).
title_short	Evidence for an auditory fovea in the New Zealand kiwi (Apteryx mantelli).
title_full	Evidence for an auditory fovea in the New Zealand kiwi (Apteryx mantelli).
title_fullStr	Evidence for an auditory fovea in the New Zealand kiwi (Apteryx mantelli).
title_full_unstemmed	Evidence for an auditory fovea in the New Zealand kiwi (Apteryx mantelli).
title_sort	evidence for an auditory fovea in the new zealand kiwi (apteryx mantelli).
publisher	Public Library of Science (PLoS)
publishDate	2011
url	https://doaj.org/article/d8cff0d289db4c2c83791a243dc0e1ba
work_keys_str_mv	AT jeremycorfield evidenceforanauditoryfoveainthenewzealandkiwiapteryxmantelli AT mfabianakubke evidenceforanauditoryfoveainthenewzealandkiwiapteryxmantelli AT stuartparsons evidenceforanauditoryfoveainthenewzealandkiwiapteryxmantelli AT jmartinwild evidenceforanauditoryfoveainthenewzealandkiwiapteryxmantelli AT christinekoppl evidenceforanauditoryfoveainthenewzealandkiwiapteryxmantelli
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Evidence for an auditory fovea in the New Zealand kiwi (Apteryx mantelli).

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