The spiral ganglion and Rosenthal's canal in beluga whales.

Title

The spiral ganglion and Rosenthal's canal in beluga whales.

Creator

Sensor Jennifer D; Suydam Robert; George John C; Liberman M C; Lovano Denise; Rhaganti Mary Ann; Usip Sharon; Vinyard Christopher J; Thewissen J G M

Publisher

Journal of morphology

Date

2015
2015-12

Description

With the increase of human activity and corresponding increase in anthropogenic sounds in marine waters of the Arctic, it is necessary to understand its effect on the hearing of marine wildlife. We have conducted a baseline study on the spiral ganglion and Rosenthal's canal of the cochlea in beluga whales (Delphinapterus leucas) as an initial assessment of auditory anatomy and health. We present morphometric data on the length of the cochlea, number of whorls, neuron densities along its length, Rosenthal's canal length, and cross-sectional area, and show some histological results. In belugas, Rosenthal's canal is not a cylinder of equal cross-sectional area, but its cross-section is greatest near the apex of the basal whorl. We found systematic variation in the numbers of neurons along the length of the spiral ganglion, indicating that neurons are not dispersed evenly in Rosenthal's canal. These results provide data on functionally important structural parameters of the beluga ear. We observed no signs of acoustic trauma in our sample of beluga whales.

Subject

Animals; Beluga Whale/*anatomy & histology; Cetacea; cochlea; Delphinapterus leucas; hearing; inner ear; Neurons/cytology; Odontoceti; Spiral Ganglion/*cytology

Identifier

Rights

Article information provided for research and reference use only. All rights are retained by the journal listed under publisher and/or the creator(s).

Pages

1455–1466

Issue

12

Volume

276

Citation

Sensor Jennifer D; Suydam Robert; George John C; Liberman M C; Lovano Denise; Rhaganti Mary Ann; Usip Sharon; Vinyard Christopher J; Thewissen J G M, “The spiral ganglion and Rosenthal's canal in beluga whales.,” NEOMED Bibliography Database, accessed May 16, 2021, https://neomed.omeka.net/items/show/3053.

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