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Abstract
The hearing sensitivity of 18 free-ranging and 10 captive harbour seals (Phoca vitulina) to aerial sounds was measured in the presence of typical environmental noise through auditory brainstem response measurements. A focus was put on the comparative hearing sensitivity at low frequencies. Low- and mid-frequency thresholds appeared to be elevated in both captive and free-ranging seals but this is likely due to masking effects and limitations of the methodology used. The data also showed individual variability in hearing sensitivity with probable age-related hearing loss found in two old harbour seals. These results suggest that the acoustic sensitivity of free-ranging animals was not negatively affected by the soundscape they experienced in the wild.
Original language | English |
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Pages (from-to) | 859-868 |
Journal | Journal of Comparative Physiology A: Neuroethology, Sensory, Neural, and Behavioral Physiology |
Volume | 202 |
Issue number | 12 |
Early online date | 31 Oct 2016 |
DOIs | |
Publication status | Published - Dec 2016 |
Keywords
- Harbour seal
- Phoca vitulina
- Hearing
- ABR
- Low-frequency
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