Efficacy of mozuku fucoidan in alternative protein-based diet to improve growth, health performance, and stress resistan
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Efficacy of mozuku fucoidan in alternative protein-based diet to improve growth, health performance, and stress resistance of juvenile red sea bream, Pagrus major Nadia Mahjabin Sony & Md. Sakhawat Hossain Shunsuke Koshio & Saichiro Yokoyama
&
Manabu Ishikawa &
Received: 4 October 2019 / Accepted: 22 September 2020 # Springer Nature B.V. 2020
Abstract We evaluated the efficacy of mozuku fucoidan supplementation to alternative dietary proteins used in fish meal (FM) replacement to enhance growth, immunity, and stress resistance of Pagrus major. Seven isonitrogenous (45% protein) experimental diets were formulated where diet 1 (D1) was FM-based control diet. Diets 2 to 7 were formulated by replacing 25, 50, and 75% of FM protein with soy protein isolate (SPI) protein, and each replacement level was supplemented without or with fucoidan at 0.4% for diet groups D2 (FM25), D3 (FM25Fu), D4 (FM50), D5 (FM50Fu), D6 (FM75), and D7(FM75Fu), respectively. Each diet was randomly allocated to triplicate groups of fish (4.1 g) for 56 days. Significantly higher weight gain and specific N. M. Sony : M. Ishikawa : S. Koshio The Graduate School of Fisheries, Kagoshima University, Shimoarata 4-50-20, Kagoshima 890-0065, Japan N. M. Sony : M. S. Hossain (*) : M. Ishikawa : S. Koshio : S. Yokoyama Laboratory of Aquatic Animal Nutrition, Faculty of Fisheries, Kagoshima University, Shimoarata 4-50-20, Kagoshima 890-0056, Japan e-mail: [email protected] M. S. Hossain Department of Aquaculture, Faculty of Fisheries, Sylhet Agricultural University, -3100, Sylhet, Bangladesh
growth rate were observed in fish fed FM50Fu diet group, and it was not differed (P > 0.05) with fish fed FM25Fu diet group. FM-based control diet showed intermediate value, and it was not differed (P > 0.05) with or without fucoidan-supplemented ≤ 50% FM replacement groups and FM75Fu diet group. Significantly lower growth performances were observed in FM75 diet group. At each replacement level, fucoidansupplemented groups showed nonsignificant improvement of feed utilization performances. Fish fed fucoidan-supplemented diets showed best condition of oxidative and freshwater stress resistance. Lysozyme activity, NBT, and peroxidase activity showed higher (P > 0.05) values in fucoidan-supplemented groups compared with the non-supplemented groups. Catalase activity was significantly lower in FM75Fu diet group. Catalase activity is significantly influenced by the interaction effects of fucoidan and FM replacement level. In conclusion, fucoidan supplementation could increase the efficiency of utilizing SPI (≥ 75%) without any adverse effects on red sea bream performance. Keywords Fucoidan . Alternative protein . Soy protein isolate . Immune responses . Stress resistance . Pagrus major
Introduction Present Address: M. S. Hossain Hagerman Fish Culture Experiment Station, Aquaculture Research Institute, University of Idaho, 3059F National Fish Hatchery Road, Hagerman, ID 83332, USA
Red sea bream (Pagrus major), known as madai in Japanese, is one of Japan’s most comm
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