Abstract
Using a classical respiratory conditioning technique, the hearing ability of the bastard halibut Paralichthys olivaceus was measured for 7 fish at 7 frequency points between 70Hz and 500Hz. The conditioning response was measured as suppression in the respiratory activity by the piezoelectric sensor fitted on a gill cover in a quiet water tank. The bastard halibut was sensitive to sounds in the frequency range from 70Hz to 500Hz. The auditory thresholds were observed among the 7 fish with much difference (about 17dB) at 100Hz and 300Hz. But the audiogram had common characteristics that they had the lowest threshold at about 100Hz and that the threshold increased rapidly with frequency of sound between 200Hz and 400Hz.An attempt was also made examine the escape response of each of the above 7 bastard halibut by the sound stimulus, but no conditioned escape response was observed after 7 times applying training stimulus.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
