抄録
Acquisition of auditory discrimination and orientation response in carps was investigated under several reinforcement conditions. In the same-side condition, the sound-producing speaker and the reinforcer of food or electric shock were adjacent. The fish in this condition learned to obtain food by swimming toward the sound-producing speaker and to avoid electric shock by swimming in the direction away from the sound-producing speaker. In the opposite-side condi-tion, the reinforcer of food or electric shock was opposite to the active speaker. The fish in this condition had a great difficulty in acquiring acoustic orientation, though the rate of learning in the food reinforced initial training and “go-no go” discrimation was similar to that for the same-side group. Another experiment, in which fish were trained to approach the correct feeding place by discriminating two kinds of the sound signal, showed that the fish was able to associate the two sound signals with the respective correct feeding place. These results were discussed in relation to utilization of cues in the orientation response in carp.
