Stage | Behaviour description |
---|---|
Induction | |
 1 | Partial or total loss of reaction in response to external stimuli except strong pressure, equilibrium is normal |
 2 | Reaction to strong tactile and stimuli, partial loss of equilibrium |
 3 | Failure to reflex activity and not reactive to strong external stimuli, complete loss of equilibrium |
Recovery | |
 4 | Start of erratic swimming, partial regained control of equilibrium |
 5 | Complete regained control of equilibrium, attained an upright position and normal swimming behaviour |