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    A comparison of auditory brainstem responses across diving bird species

    Access Status
    Fulltext not available
    Authors
    Crowell, S.
    Wells-Berlin, A.
    Carr, C.
    Olsen, G.
    Therrien, R.
    Yannuzzi, S.
    Ketten, Darlene
    Date
    2015
    Type
    Journal Article
    
    Metadata
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    Citation
    Crowell, S. and Wells-Berlin, A. and Carr, C. and Olsen, G. and Therrien, R. and Yannuzzi, S. and Ketten, D. 2015. A comparison of auditory brainstem responses across diving bird species. Journal of Comparative Physiology A. 201 (8): pp. 803-815.
    Source Title
    Journal of Comparative Physiology A
    DOI
    10.1007/s00359-015-1024-5
    ISSN
    0340-7594
    School
    School of Science
    URI
    http://hdl.handle.net/20.500.11937/55628
    Collection
    • Curtin Research Publications
    Abstract

    © 2015, Springer-Verlag Berlin Heidelberg. There is little biological data available for diving birds because many live in hard-to-study, remote habitats. Only one species of diving bird, the black-footed penguin (Spheniscusdemersus), has been studied in respect to auditory capabilities (Wever et al., Proc Natl Acad Sci USA 63:676–680, 1969). We, therefore, measured in-air auditory threshold in ten species of diving birds, using the auditory brainstem response (ABR). The average audiogram obtained for each species followed the U-shape typical of birds and many other animals. All species tested shared a common region of the greatest sensitivity, from 1000 to 3000 Hz, although audiograms differed significantly across species. Thresholds of all duck species tested were more similar to each other than to the two non-duck species tested. The red-throated loon (Gavia stellata) and northern gannet (Morus bassanus) exhibited the highest thresholds while the lowest thresholds belonged to the duck species, specifically the lesser scaup (Aythyaaffinis) and ruddy duck (Oxyurajamaicensis). Vocalization parameters were also measured for each species, and showed that with the exception of the common eider (Somateriamollisima), the peak frequency, i.e., frequency at the greatest intensity, of all species’ vocalizations measured here fell between 1000 and 3000 Hz, matching the bandwidth of the most sensitive hearing range.

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