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Abstract ▼ AI-Helper

Following the previous study on the nutritional quantity of Al, Fe, and their interrelationships with other trace metals, this study was conducted to determine the effect of supplementation of Cu and Mn to fish meal-diets on the growth of Japanese eel. The feeding experiment to determine Cu requirem...

Following the previous study on the nutritional quantity of Al, Fe, and their interrelationships with other trace metals, this study was conducted to determine the effect of supplementation of Cu and Mn to fish meal-diets on the growth of Japanese eel. The feeding experiment to determine Cu requirement was conducted using white fish meal-diets supplemented with 0, 5, 10, or 20 $\mu$g/g cupric sulfate, and that to determine Mn requirement was conducted by suppling the diet with 0, 10, 20, or 40 $\mu$g/g manganese sulfate. The results revealed that the fish on diet annexed with 5 $\mu$g/g of Cu were observed to have the best growth among these groups. In case of Mn, 20 $\mu$g/g of supplementary level promoted growth rate and 40 $\mu$g/g of diet resulted in the highest feed efficiency. On the other hand, the highest level of Cu (20 $\mu$g/g), and Mn (40 $\mu$g/g) supplementary diets did not expressed adverse effect on growth. These results indicated that the suitable Cu and Mn supplementary concentrations are 20 $\mu$g/g and 30 $\mu$g/g of formulated the white fish meal-diet respectively. The white fish meal had 1.6 $\mu$g/g of Cu and 6.1 $\mu$g/g of Mn.

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