|Title||Aerial low-frequency hearing in captive and free-ranging harbour seals (Phoca vitulina) measured using auditory brainstem responses|
|Author(s)||Lucke, K.; Hastie, Gordon D.; Ternes, Kerstin; McConnell, Bernie; Moss, Simon; Russell, Deborah J.F.; Weber, Heike; Janik, Vincent M.|
|Source||Journal of Comparative Physiology A-Sensory Neural and Behavioral Physiology 202 (2016)12. - ISSN 0340-7594 - p. 859 - 868.|
|Publication type||Refereed Article in a scientific journal|
|Keyword(s)||ABR - Harbour seal - Hearing - Low frequency - Phoca vitulina|
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.