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Table 2 Stages of anesthesia induction and recovery in shrimps

From: Pharmacokinetics studies of eugenol in Pacific white shrimp (Litopenaeus vannamei) after immersion bath

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