Effect of Transport Density on Greater Amberjack (Seriola dumerili) Stress, Metabolism, Antioxidant Capacity and Immunity

This study sought to characterize the effect of density stress on greater amberjack ( Seriola dumerili ) survival determine an optimal transport density. To achieve this, this experiment simulated conditions fish (body length: 4.09 ± 1.00 cm; weight: 0.9 0.05 g) using closed oxygen at 5 different densities (D1 = 1.125 kg/m 3 , D2 2.25 D3 3.375 D4 4.5 and D5 6.75 for 8 hours, after which biochemical indicators, stress, metabolism, antioxidant capacity were evaluated. After 8h, only D1 groups exhibited rates above 90%. The pH water decreased with density, whereas ammonia nitrogen nitrite increased Cortisol (COR) levels not significantly among all groups, but tended increase increasing In study, COR is a relatively stable index in group, change will cause immune-related genes, so can inhibit expression immune genes within certain group highest catalase (CAT) glutathione peroxidase (GSH‐PX) levels. addition, related factor interleukin-1β (IL-1β), tumor necrosis (TNF-α), major histocompatibility complex (MHC-1) nuclear kappa-B (NF-KB1) lowest group. during transportation affects quality, immunity. During transportation, assuming that plastic bags are airtight ensure aerobic time h, should be maintained approximately .