Insect larvae, Hermetia illucens in poultry by-product meal for barramundi, Lates calcarifer modulates histomorphology, immunity and resistance to Vibrio harveyi

摘要: This study investigated the effects of replacement fishmeal (FM) with poultry by-product (PBM) protein, supplemented black soldier fly, Hermetia illucens (HI) larvae on growth, histomormhology, immunity and resistance to Vibrio harveyi in juvenile barramundi. Two hundred twenty five barramundi averaging 3.51 ± 0.03 g were randomly allocated into three groups fed isonitrogenous isocalorific diets containing different levels PBM HI as follows: Control (FM based diet), 45PBM + HI (45% 10% HI), 90PBM + HI (90% HI) for 6 weeks. Results showed that dietary inclusion significantly improved growth performance than control whereas inhibition occurred 90PBM + HI. The demonstrated significant increases histometric measurements (villus enterocyte width, microvilli height) acidic mucins. impaired was further associated multifocal necrosis liver, an upregulation stress related genes (HSP70 HSP90) increase liver enzymes. When fed, survival against V. increased also serum immune-related head kidney observed after infection.