College of Marine Science, University of South Florida, 140 7th Avenue South, St Petersburg, FL 33701, USA.
J Fish Biol. 2009 Dec;75(10):2768-76. doi: 10.1111/j.1095-8649.2009.02477.x.
Field measurements of hearing thresholds were obtained from the Atlantic sharpnose shark Rhizoprionodon terraenovae using the auditory evoked potential method (AEP). The fish had most sensitive hearing at 20 Hz, the lowest frequency tested, with decreasing sensitivity at higher frequencies. Hearing thresholds were lower than AEP thresholds previously measured for the nurse shark Ginglymostoma cirratum and yellow stingray Urobatis jamaicensis at frequencies <200 Hz, and similar at 200 Hz and above. Rhizoprionodon terraenovae represents the closest comparison in terms of pelagic lifestyle to the sharks which have been observed in acoustic field attraction experiments. The sound pressure levels that would be equivalent to the particle acceleration thresholds of R. terraenovae were much higher than the sound levels which attracted closely related sharks suggesting a discrepancy between the hearing threshold experiments and the field attraction experiments.
使用听觉诱发电位（AEP）方法从大西洋尖吻鲛（Rhizoprionodon terraenovae）中获得了听力阈值的现场测量数据。在测试的最低频率 20 Hz 处，这种鱼的听力最敏感，随着频率的升高，灵敏度逐渐降低。在低于 200 Hz 的频率下，听力阈值低于之前为护士鲨（Ginglymostoma cirratum）和黄貂鱼（Urobatis jamaicensis）测量的 AEP 阈值，而在 200 Hz 及以上频率下则相似。就洄游生活方式而言，Rhizoprionodon terraenovae 与在声纳吸引实验中观察到的鲨鱼最为接近。相当于 Rhizoprionodon terraenovae 颗粒加速度阈值的声压级远远高于吸引亲缘关系较近的鲨鱼的声级，这表明听力阈值实验与现场吸引实验之间存在差异。
