WILD MINT, Mentha piperita TO ANESTHETIZE FINGERLINGS OF THE COMMON CARP Cyprinus carpio

Extracted solution of Wild mint (Mentha piperita) with six concentrations (100, 150, 200, 250,
300, and 350 mg/L) was used to anesthetize common carp Cyprinus carpio fingerling (total length 8.55 ±
0.41 cm and total weight 7.75±1.18 gm). Fish behavior was noticed during anesthesia. Results showed
that extracted solution of wild mint has partial and overall anesthesia effect on Cyprinus carpio fingerling
with the inverse relationship between the concentrations and the time needed to reach partial and overall
anesthesia, and a direct relationship between concentrations and time needed for fish recovery. The best
results were obtained by using a concentration of 350 mg/l, where the time for partial anesthesia was 8.15
±0.64 min time for overall anesthesia was 10.15±0.30 min. The time needed for partial recovery was
16.25±1.24 min and the time needed for overall recovery was 21.2±1.11 min. Fish behavior observations
revealed a difference ranging from slow swimming with increasing breathing movements to vertical
swimming near the surface, then laying at the bottom, and too much decrease in breathing movements.
Results appeared that there were no significant differences (p≥0.01) between glucose concentration in
fish blood plasma after recovery and control fishes, so it was concluded that these fishes exhibited no
stress during anesthesia by using the wild mint extracted solution. The results showed that there were no
significant differences (p≥0.01) in both ALP, GOT, GPT, CK, and LDH enzymes among fishes after
recovery in comparison with the control fishes. This indicated that the treated fishes exhibited no physical
damage that might lead to poor health conditions. In addition, the results showed that there were
significant differences (p≤0.01) in blood parameters (RBC and Hb) among fishes after one week from the
end of exposure to an extracted solution of wild mint in comparison with the control fishes.