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|Title:||Possible age-related hearing loss (presbycusis) and corresponding change in echolocation parameters in a stranded Indo-Pacific humpback dolphin|
|Keywords:||Auditory evoked potential|
|Citation:||Li, S., Wang, D., Wang, K., Hoffmann-Kuhnt, M., Fernando, N., Taylor, E.A., Lin, W., Chen, J., Ng, T. (2013-11). Possible age-related hearing loss (presbycusis) and corresponding change in echolocation parameters in a stranded Indo-Pacific humpback dolphin. Journal of Experimental Biology 216 (22) : 4144-4153. ScholarBank@NUS Repository. https://doi.org/10.1242/jeb.091504|
|Abstract:||The hearing and echolocation clicks of a stranded Indo-Pacific humpback dolphin (Sousa chinensis) in Zhuhai, China, were studied. This animal had been repeatedly observed in the wild before it was stranded and its age was estimated to be ∼40years. The animal's hearing was measured using a non-invasive auditory evoked potential (AEP) method. Echolocation clicks produced by the dolphin were recorded when the animal was freely swimming in a 7.5m (width)×22m (length)×4.8m (structural depth) pool with a water depth of ∼2.5m. The hearing and echolocation clicks of the studied dolphin were compared with those of a conspecific younger individual, ∼13years of age. The results suggested that the cut-off frequency of the high-frequency hearing of the studied dolphin was ∼30-40kHz lower than that of the younger individual. The peak and centre frequencies of the clicks produced by the older dolphin were ∼16kHz lower than those of the clicks produced by the younger animal. Considering that the older dolphin was ∼40years old, its lower high-frequency hearing range with lower click peak and centre frequencies could probably be explained by age-related hearing loss (presbycusis). © 2013. Published by The Company of Biologists Ltd.|
|Source Title:||Journal of Experimental Biology|
|Appears in Collections:||Staff Publications|
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