Abstract
Odontocete ear complexes or tympanoperiotic complexes (TPCs) were compared for asymmetry. Left and right TPCs were collected from one long-beaked common dolphin (Delphinus capensis) and one Amazon River dolphin (Inia geoffrensis). Asymmetry was assessed by volumetric comparisons of left and right TPCs and by visual comparison of superimposed models of the right TPC to a reflected mirror image of the left TPC. Kolmogorov–Smirnov tests were performed to compare the resonant frequencies of the TPCs as calculated by vibrational analysis. All analyses found slight differences between TPCs from the same specimen in contrast to the directional asymmetry in the nasal region of odontocete skulls.
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Acknowledgments
We thank Dr. Winston Lancaster (Sacramento State University, Sacramento, CA) for his assistance on this project. William Ary thanks his committee members Dr. Doug Deutschman and Dr. Sam Kassegne for their assistance and advice, his lab mates Reagan Furbish, Sarah Kienle, Meghan Smallcomb, and Nick Zellmer, and his former lab mates Jessica Martin and Celia Barroso.
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Ary, W., Cranford, T.W., Berta, A., Krysl, P. (2016). Functional Morphology and Symmetry in the Odontocete Ear Complex. In: Popper, A., Hawkins, A. (eds) The Effects of Noise on Aquatic Life II. Advances in Experimental Medicine and Biology, vol 875. Springer, New York, NY. https://doi.org/10.1007/978-1-4939-2981-8_7
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