THE AVOIDING RESPONSE TO DIPOLE STIMULI IN JUVENILE STURGEON

Here, the electrosensory responses of juvenile siberian sturgeon to electric fields simulated by dipole were studied. The results showed that the fish can avoid the dipole electric fields, and significant differences in avoiding thresholds were observed among different age groups. The mean avoiding threshold was (457.532.5) V/cm at 2 months old, and it was (29.52.5) V/cm at 3 months old, and it reached (101.0) V/cm at 7 months old. The morphological observation showed that the electroreceptors increased from 2 month (2234470) to 7 month (5273523) old. These results suggest that the electrosensory sensitivity enhanced with increased electroreceptors in the development of the juvenile sturgeon.