Use of Meat and Bone Meal as a Protein Source in the Diet of Juvenile Japanese Flounder

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  • Use of Meat and Bone Meal as a Protein

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Feeding experiments were conducted at 20°C with diets containing 0, 9, 18, 36, and 44% of meat and bone meal (MBM) to examine the potential of MBM as a substitute for fish meal in the diet of Japanese flounder. Juvenile fish, 2 to 5g in initial body weight, were fed on each diet to satiation twice a day, 6 days per week, for 4 and 7 weeks (trials 1 and 2).<br> In both trials, the final body weight of fish, the weight gain, feed efficiency (FE), and protein efficiency ratio (PER) of fish fed MBM diets tended to decrease as the proportion of MBM in the diet increased. The FE of fish fed the diet containing 44% of MBM as well as PER of those fed 36 and 44% MBM diets were significantly lower than those of the control diet (0% MBM diet). The weight gain of fish fed 36 and 44% MBM diets was also lower than that of the control in trial 2. No significant differences in these parameters were observed among dietary groups containing 0, 9, and 18% of MBM except the final body weight in trial 2. There was little difference in the proximate composition of the whole fish body and the hematological and hematochemical parameters between the fish fed 18% MBM diet and the control group.

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