title: Likely Age-Related Hearing Loss (Presbycusis) in a Stranded Indo-Pacific Humpback Dolphin (Sousa chinensis).
abstract: The hearing of a stranded Indo-Pacific humpback dolphin (Sousa chinensis) in Zhuhai, China, was measured. The age of this animal was estimated to be ~40 years. The animal's hearing was measured using a noninvasive auditory evoked potential (AEP) method. The results showed that the high-frequency hearing cutoff frequency of the studied dolphin was ~30-40 kHz lower than that of a conspecific younger individual ~13 year old. The lower high-frequency hearing range in the older dolphin was explained as a likely result of age-related hearing loss (presbycusis).
authors.affiliation: Marine Mammal and Marine Bioacoustics Laboratory, Sanya Institute of Deep-Sea Science and Engineering, Chinese Academy of Sciences, Sanya, 572000, China. lish@sidsse.ac.cn.
authors.forename: Songhai
authors.initials: S
authors.lastname: Li
authors.affiliation: Key Laboratory of Aquatic Biodiversity and Conservation, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China. wangd@ihb.ac.cn.
authors.forename: Ding
authors.initials: D
authors.lastname: Wang
authors.affiliation: Key Laboratory of Aquatic Biodiversity and Conservation, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China. wandk@ihb.ac.cn.
authors.forename: Kexiong
authors.initials: K
authors.lastname: Wang
authors.affiliation: Tropical Marine Science Institute, National University of Singapore, Singapore, 119227, Singapore. mahoku@nus.edu.sg.
authors.forename: Matthias
authors.initials: M
authors.lastname: Hoffmann-Kuhnt
authors.affiliation: Ocean Park Corporation, Aberdeen, Hong Kong. nimal.fernando@oceanpark.com.hk.
authors.forename: Nimal
authors.initials: N
authors.lastname: Fernando
authors.affiliation: Tropical Marine Science Institute, National University of Singapore, Singapore, 119227, Singapore. tmsohe@nus.edu.sg.
authors.forename: Elizabeth A
authors.initials: EA
authors.lastname: Taylor
authors.affiliation: The Pearl River Estuary Chinese White Dolphin National Nature Reserve, Zhuhai, 519080, China. menjilam@163.com.
authors.forename: Wenzhi
authors.initials: W
authors.lastname: Lin
authors.affiliation: The Pearl River Estuary Chinese White Dolphin National Nature Reserve, Zhuhai, 519080, China. zhbht2003@126.com.
authors.forename: Jialin
authors.initials: J
authors.lastname: Chen
authors.affiliation: Ocean Park Conservation Foundation Hong Kong, Ocean Park, Aberdeen, Hong Kong. timothy.ng@oceanpark.com.hk.
authors.forename: Timothy
authors.initials: T
authors.lastname: Ng
mesh_terms: D000375:Aging / Q000502:physiology*; D000818:Animals; D002681:China; D004289:Dolphins / Q000502:physiology*; D005843:Geography; D008297:Male; D011304:Presbycusis / Q000503:physiopathology*; D013018:Sound Spectrography
keywords: Auditory evoked potential; Chinese white dolphin; Marine mammals; Noise; Odontocetes