Suitable Lipid Level in Brown Fish Meal Diet for Tiger Puffer

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  • Suitable Lipid Level in Brown Fish Meal

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Tiger puffer Takifugu rubripes, weighing about 3.7g, were reared for 20 days on brown fish meal diets with graded levels of pollack liver oil, 0, 2.5, 5.0, 7.5, and 11.0%.<br> The best feed efficiency, protein efficiency ratio, and apparent protein retention were obtained in the group fed the diet with 7.5% oil. Otherwise, there appeared to be no significant differences in weight gain and fatness among the dietary treatments under isocaloric ration size. Moreover, protein sparing effect was also observed in the groups fed the diets with 7.5% oil, sparing about 11.5% of dietary protein for 100g of weight gain compared with the puffer fed the diet without oil.<br> These results indicate that a suitable dietary level of pollack liver oil for the puffer is estimated to be around 7.5%, namely dietary crude fat of about 11.5%, when 48% brown fish meal, 10% wheat gluten, and 17% white dextrin are used as protein and carbohydrate sources.

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