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In the present study, the effect of different levels of magnetized water on the biochemical parameters of rainbow trout was investigated. 120 rainbow trout with mean weight (150±7 gr) were introduced to 12 tanks (500 L). Magnetizers in different intensities including 1500, 2500 and 3500 Gauss (3 replicates per treatment) were installed at the entry of every tank. Experimental period was eight weeks. The blood sampling was done at the beginning and end of the study to evaluate the biochemical blood parameters like Glucose, Lysozyme, total protein, Cortisol, aspartate aminotransferase (AST), alanine aminotransferase (ALT) and alkaline phosphatase (ALP). The results showed that the magnetized water had a significant effect on the biochemical parameters of the rainbow trout blood (P˂0.05). Totally, the liver enzymes (ALT, AST and ALP) decreased significantly (P˂0.05) with increasing of the magnetic intensity compared to the control treatment and in the case of lysozyme and total protein significantly increased (P˂0.05). The effect of magnetized water on stress-related parameters did not follow a specific pattern, however, the amount of glucose and cortisol in 2500- gauss treatment was 55.50±0.86 mg/dl and 11.65±0.08 ng/ml, respectively in which was decreased significantly (P˂0.05). In conclusion, some blood parameters of rainbow trout improved using different intensities of the magnetized water up to 2500 gauss.

Keywords: Magnetized Water, Biochemical Parameters, Rainbow Trout

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