CAJ | 학술논문

　　利用听性脑干反应技术研究了胭脂鱼(Myxocyprinus asiaticus)的听觉阈值。通过插入皮下的电极记录了10尾胭脂鱼的短纯音听觉诱发电位。结果显示,在系统最大声强下,胭脂鱼的听频范围为100~5000 Hz,其中对100~2000 Hz的声音敏感度较高,最敏感的频率为800 Hz,听觉阈值约为69.8 dB。随着声强的减小,胭脂鱼的听性脑干反应波形最大,振幅减小,潜伏期延长。将10尾胭脂鱼的阈值平均,得到了胭脂鱼的听性脑干反应听力图。胭脂鱼的听力图呈“U”形,属于典型的动物听力曲线。研究胭脂鱼的听觉阈值对胭脂鱼物种保护具有重要意义,同时可为评估噪声对胭脂鱼的影响提供数据支持。
　　이용은성뇌간반응기술연구료연지어(Myxocyprinus asiaticus)적은각역치。통과삽입피하적전겁기록료10미연지어적단순음은각유발전위。결과현시,재계통최대성강하,연지어적은빈범위위100~5000 Hz,기중대100~2000 Hz적성음민감도교고,최민감적빈솔위800 Hz,은각역치약위69.8 dB。수착성강적감소,연지어적은성뇌간반응파형최대,진폭감소,잠복기연장。장10미연지어적역치평균,득도료연지어적은성뇌간반응은력도。연지어적은력도정“U”형,속우전형적동물은력곡선。연구연지어적은각역치대연지어물충보호구유중요의의,동시가위평고조성대연지어적영향제공수거지지。
Auditory brainstem response (ABR) technic has been widely used to study hearing ability in fishes. In contrast to the behavior and traditional electrophysiology methods, this approach provides the following advan-tages:(1) there is no harm to the animals because it is non-invasive;(2) hearing sensitivity in untrained fish can be determined rapidly; (3) individuals are reusable. Using ABR approach, auditory evoked potentials of 10 Chinese suckers Myxocyprinus asiaticus were recorded using two subcutaneous electrodes. We found that the fish can de-tected tone bursts from 100 to 5 000 Hz. The results showed the best hearing between 100 to 2 000 Hz, and the lowest threshold was 69.8 dB at 800 Hz. There was a positive correlation between the amplitude of the ABR waveform and the stimulus intensity, while there was a negative correlation between latency and stimulus intensity. Threshold values from 10 individuals were averaged to produce audiogram. Similarly to the most audiograms, it is a U-shape with thresholds increasing at both high and low frequency limits of hearing. The results have an impor-tant significance in protecting Chinese sucker and providing supporting data for access the effect of noise on fish-es.