Investigating fear in rainbow trout (Oncorhynchus mykiss) using the conditioned-suppression paradigm

Trout learned the operant task of pendulum-pressing for a food-reward in a mean of 4.3 sessions lasting 1 hr. In a separate phase, fish also learned–through classical conditioning–to associate a neutral light cue with an aversive stimulus. When again allowed to pendulum-press for food, after aversive classical conditioning, there was a drop in the rate […]