EFFECTIVENESS OF CLOVE SEED EXTRACTS AS ANAESTHETICS IN TRANSPORTATION OF Tilapia guineensis JUVENILES

Abstract

The effectiveness of clove seed extracts as a viable anaesthetic agent in transportation of Tilapia guineensis were evaluated. Juveniles of T. guineensis (mean length 13.12cm ±1.20; mean weight 45.64g ±1.84) were exposed in three replicates to different concentrations (0.00mg/L- control; 5.00; 10.00; 15.00; 20.00 and 25.00mg/L) of clove seed  aqueous extracts, extracted in water .  The exposed fish were later transported in open plastic tanks from Buguma to Aluu, in Port Harcourt over a distance of 50km.  Before and after transportation, glucose and cortisol levels in the plasma of the fish were assessed.  The result of the study indicated a significant reduction (P<0.05) in the levels of cortisol and glucose in the plasma of the fish with increasing concentrations of the anaesthetics.  The lowest survival rate (30.0%) was recorded in the fish transported with no anesthetics, while 100% survivals were recorded in fish exposed to 15.0 and 20.0 mg/L of the extracts.  In conclusion, this study suggests that application of clove seed extracts within the range of 10.00 and 20.00 mg/L reduced the stress response in T. guineensis during transportation, thereby enhances their survival.

Keywords

• Aquaculture,Clove,Anaesthetics,Tilapia,Transportation

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