Lucke Klaus, Hastie Gordon D, Ternes Kerstin, McConnell Bernie, Moss Simon, Russell Deborah J F, Weber Heike, Janik Vincent M
Centre for Marine Science and Technology, Curtin University, Perth, Australia.
Wageningen Marine Research, Wageningen University and Research, Wageningen, The Netherlands.
J Comp Physiol A Neuroethol Sens Neural Behav Physiol. 2016 Dec;202(12):859-868. doi: 10.1007/s00359-016-1126-8. Epub 2016 Oct 31.
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.
通过听觉脑干反应测量，在典型环境噪声存在的情况下，对18只自由放养的和10只圈养的斑海豹（Phoca vitulina）的听觉敏感性进行了测量。重点关注了低频下的比较听觉敏感性。圈养和自由放养的海豹在低频和中频阈值似乎都有所升高，但这可能是由于掩蔽效应和所用方法的局限性。数据还显示了听觉敏感性的个体差异，在两只老年斑海豹中发现了可能与年龄相关的听力损失。这些结果表明，自由放养动物的听觉敏感性并未因其在野外所经历的声景而受到负面影响。
