Novel object test: examining nociception and fear in the rainbow trout - ScienceDirect

The experiment was aimed :

To assess fear responses to a novel object in rainbow trout fish.

To determine whether nociception or fear will dominate attention in a fish novel paradigm.

To measure the degree of neophobia to a novel object in rainbow trout fish.

To know the response of the fish after removing the fear causing object.

To know the effect of removing the nociception response by morphine administration and examining the response to a novel object.