Scaling of ear morphology across 127 bird species and its implications for hearing performance

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dc.contributor.author Zeyl, Jeffrey N.
dc.contributor.author Snelling, Edward P.
dc.contributor.author Clusella-Trullas, Susana
dc.contributor.author Joo, Rocio
dc.date.accessioned 2023-12-04T07:37:32Z
dc.date.issued 2023-02
dc.description DATA AVAILABILITY : Links to code and data are embedded within article text. en_US
dc.description.abstract The dimensions of auditory structures among animals of varying body size can have implications for hearing performance. Larger animals often have a hearing range focused on lower frequencies than smaller animals, which may be explained by several anatomical mechanisms in the ear and their scaling relationships. While the effect of size on ear morphology and hearing performance has been explored in some mammals, anurans and lizards, much less is known about the scaling relationships for the single-ossicle, internally-coupled ears of birds. Using micro- and nano-CT scans of the tympanic middle and inner ears of 127 ecologically and phylogenetically diverse bird species, spanning more than 400-fold in head mass (2.3 to 950 g), we undertook phylogenetically-informed scaling analyses to test whether 12 morphological traits, of functional importance to hearing, maintain their relative proportions with increasing head mass. We then extended our analysis by regressing these morphological traits with measures of hearing sensitivity and range to better understand morphological underpinnings of hearing performance. We find that most auditory structures scale together in equal proportions, whereas columella length increases disproportionately. We also find that the size of several auditory structures is associated with increased hearing sensitivity and frequency hearing limits, while head mass did not explain these measures. Although both birds and mammals demonstrate proportional scaling between auditory structures, the consequences for hearing in each group may diverge due to unique morphological predictors of auditory performance. en_US
dc.description.department Anatomy and Physiology en_US
dc.description.embargo 2023-12-30
dc.description.librarian hj2023 en_US
dc.description.sdg SDG-03:Good heatlh and well-being en_US
dc.description.sponsorship A Human Frontier Science Program Young Investigator Grant. en_US
dc.description.uri http://www.elsevier.com/locate/heares en_US
dc.identifier.citation Zeyl, J.N., Snelling, E.P., Clusella-Trullas, S. et al. 2023, 'Scaling of ear morphology across 127 bird species and its implications for hearing performance', Hearing Research, vol. 428, art. 108679, pp. 1-11, doi : 10.1016/j.heares.2022.108679. en_US
dc.identifier.issn 0378-5955 (print)
dc.identifier.issn 1878-5891 (online)
dc.identifier.other 10.1016/j.heares.2022.108679
dc.identifier.uri http://hdl.handle.net/2263/93588
dc.language.iso en en_US
dc.publisher Elsevier en_US
dc.rights © 2022 Elsevier. All rights reserved. Notice : this is the author’s version of a work that was accepted for publication in Hearing Research. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. A definitive version was subsequently published in Hearing Research, vol. 428, art. 108679, pp. 1-11, 2023, doi : 10.1016/j.heares.2022.108679. en_US
dc.subject Allometry en_US
dc.subject Hearing range en_US
dc.subject Hearing sensitivity en_US
dc.subject Impedance-matching en_US
dc.subject Single ossicle ear en_US
dc.subject SDG-03: Good health and well-being en_US
dc.title Scaling of ear morphology across 127 bird species and its implications for hearing performance en_US
dc.type Postprint Article en_US


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