THE EFFECT OF TREATMENT WITH MAGNETIC WATER ON TRYPSIN AND CHYMOTRYPSIN IN COMMON CARP Cyprinus carpio L .

Abstract

The current study was undertaken to investingate the effect of magnetizedwater of common carp Cyprinus carpio L. A total 64 fish with an average weightof 45 g. Fish were divided randomly into four treatments. Eight fish distributedfor each treatments, with two replicate. Control group without watermagnetized, the first treated group (T1) used magneted water of 500 gauss , thesecand group (T2) with 1000 gauss, the third group (T3) with 1500 gauss, wasused two replicate for treatment, during the period of the experemt which lastfor 60 days. All fish were fid with the same nutrient , the power of magnificationmentioned above were used tap water to determine the activity of the bestmagnetic waves for growth and to assess the activities of digestive enzymes.(trypsin, chymotrypsin), at zero time and after 60 days of feeding to differentpart of digestive tract (front, middle, posterior). The analysis of data expressedsignificant differences (p≤ 0.05) between all the treatments. The third treatmentswas obtained among the best result. The weight gain was 66.24 , 44.24, and 87.5g/fish for each treatment respectively. Trypsin and Chymotrypsin weredistributed at zero time among all the digestive tract of experimental fish. Thehighest enzyme activity was found at the anterior and the middle parts, (p≤0.05)comparing to the posterior and the values were 0.02,0.22,and 0,24 unit / ml fortrypsin enzyme and 0.2,0.67 and 0.63 unit/ml of chymotrypsin respectively foreach three parts. The three treatments expressed the highest activity of enzymein the anterior and middle parts of the intestine after 60 days of feeding, thevalues were 0.98 , 0.73, and 0.44 unit/ml for anterior and 0.99, 0.81 and 0.45unit/ml for middle part for the three treatments respectively, and they differedsignificantly for the posterior part (p≤0.05) 0.02, 0,03 and 0.02 unit/ml of alltreatments respectively of trypsin enzyme and 1.86, 1.56 and 0.08 unit/ ml foranterior part of the intestine and 1.91, 1,82 and 0.8 unit/ml of the middle partwhich are differ significantly while the posterior part wae 0.32, 0.32 and 0.41unit/ ml for all treatments respectively of chymotrypsin enzyme. The resultsexpressed in this study revealedthat the magneted water is better for rearing andgrowth of common carp fish up to 1500 gauss, which gave a better weight gainsand increased the activity of trypsin and chymotrypsin enzymes.