Mickle Megan F, Pieniazek Rachel H, Higgs Dennis M
Department of Biological Sciences, University of Windsor, 401 Sunset Avenue, Windsor, Ontario Canada, N9B 3P4.
R Soc Open Sci. 2020 Jan 22;7(1):191544. doi: 10.1098/rsos.191544. eCollection 2020 Jan.
The ability of elasmobranchs to detect and use sound cues has been heavily debated in previous research and has only recently received revived attention. To properly understand the importance of sound to elasmobranchs, assessing their responses to acoustic stimuli in a field setting is vital. Here, we establish a behavioural audiogram of free-swimming male and female southern stingrays () exposed to low-frequency tones. We demonstrate that female stingrays exposed to tones (50-500 Hz) exhibit significant changes in swimming behaviours (increased time spent swimming, decreased rest time, increased surface breaches and increased side swimming with pectoral flapping) at 140 dB re 1 µPa (-2.08 to -2.40 dB re 1 m s) while males exposed to the same tones did not exhibit a change in these behaviours until 160 dB re 1 µPa (-1.13 to -1.21 dB re 1 m s). Our results are the first demonstration of field responses to sound in the Batoidea and show a distinct sensitivity to low-frequency acoustic inputs.
在以往的研究中，软骨鱼类检测和利用声音线索的能力一直备受争议，直到最近才重新受到关注。为了正确理解声音对软骨鱼类的重要性，在野外环境中评估它们对声学刺激的反应至关重要。在这里，我们建立了自由游动的雄性和雌性南方黄貂鱼（）暴露于低频音调下的行为听力图。我们证明，暴露于音调（50 - 500赫兹）的雌性黄貂鱼在140分贝声压级相对于1微帕斯卡（相对于1米每秒 - 2.08至 - 2.40分贝）时，游泳行为会发生显著变化（游泳时间增加、休息时间减少、跃出水面次数增加以及通过胸鳍拍动进行侧游的次数增加），而暴露于相同音调的雄性黄貂鱼直到160分贝声压级相对于1微帕斯卡（相对于1米每秒 - 1.13至 - 1.21分贝）时这些行为才会发生变化。我们的结果首次证明了鲼形目鱼类对声音的野外反应，并显示出对低频声学输入的明显敏感性。
