Effects of Substitution of Fish Meal (FM) and Macroalgae (MA) with Soybean Meal and Rice Bran in a Commercial Juvenile Abalone (Haliotis duscus hannai) Diet on Growth Performance
2017
Lee, Ki Wook | Kim, Hee Sung | Choi, Dong Gyu | Jang, Bok Il | Kim, Hyeon Jong | Yun, Ahyeong | Cho, Sung Hwoan | Min, Byeong-Hee | Kim, Kyoung-Duk | Han, Hyon-Sob
The effects of fish meal (FM) and macroalgae (MA) substitution with fermented soybean meal and rice bran were tested on a commercial diet in juvenile abalone. Abalone (21600) individuals were distributed equally to four diet treatments. Four experimental diets were prepared: a Std diet, FM50, FM50+MA50 and FM50+MA100. The standard diet (Std) consists of FM (140 g/kg), fermented soybean meal (250 g/kg), corn gluten meal (34 g/kg), shrimp meal (30 g/kg), wheat flour (200 g/kg), dextrin (50 g/kg) and MA (250 g/kg). Undaria and Laminaria were also prepared. The feeding trial lasted for 16 weeks. Survival of abalone fed the formulated diets was higher than that of abalone fed the Undaria and Laminaria. Weight gain and specific growth rate of abalone fed the Std diet were higher than all other diets. Substitutability of the fermented soybean meal for FM seemed to be rather limited in the commercial diet for abalone farms. However, another 500 g/kg MA in the commercial diet could be substituted with rice bran as long as 500 g/kg MA were substituted with rice bran. The FM50+MA50 diet is the most recommendable for abalone farm in considering feed cost.
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