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  • Title: Effects of dietary black soldier fly (Hermetia illucens Linnaeus) on the disease resistance of juvenile grouper (Epinephelus coioides).
    Author: Jiang B, Sun Y, Li W, Liu C, Wen C, Li A, Huang Y, Su Y.
    Journal: Fish Shellfish Immunol; 2022 Apr; 123():136-141. PubMed ID: 35218972.
    Abstract:
    An experiment was performed to study the effects of dietary levels of black soldier fly larva meal (BSFLM) on the growth performance, immunity and disease resistance of juvenile grouper (Epinephelus coioides). Four isoproteic and isoenergetic diets were formulated with dietary BSFLM levels of 0 g/kg (T0), 25 g/kg (T2.5), 50 g/kg (T5) and 100 g/kg (T10). Each diet was randomly fed to triplicate groups, each containing 40 fish. The results of the 30-day study indicated that fish growth performance was not affected in the T2.5 and T5 groups compared with the T0 group. In the group with a dietary BSFLM level of 100 g/kg, the feed coefficient was significantly higher than that in the other three groups. The superoxide dismutase, catalase, glutathione peroxidase, lysozyme activity, and malondialdehyde content in the liver, and the interleukin-1 beta (IL-1β), gamma interferon (IFN-γ), tumor necrosis factor alpha (TNF-α) and heat shock protein 70 (HSP70) expression in the gills, head kidney, liver and spleen remained consistent in all groups. In addition, no significant differences in the cumulative mortality or parasite abundance in groupers after Vibrio harveyi and Cryptocaryon irritans infection were observed. These results suggested that BSFLM supplemented diets did not inhibit disease resistance in groupers.
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