Optimal dietary lipid requirement of postlarval white shrimp, Litopenaeus vannamei in relation to growth performance, stress tolerance and immune response

Abstract

A 25‐day experiment was conducted to evaluate the optimal lipid level for postlarval Litopenaeus vannamei. Shrimp (1.7 mg) were fed five isonitrogenous diets containing grade levels of lipid (96.6, 114.3, 128.5, 136.5 and 154.5 g/kg diet, respectively). Each diet was assigned to four tanks (500 shrimp), and shrimp were fed six times a day. Weight gain was increased with the increasing dietary lipid levels, and the highest weight gain was observed in shrimp fed diet with 154.5 g/kg lipid (p < 0.05). On the contrary, the survival was lowest in shrimp fed the L15.45 and highest in shrimp fed the L11.43. Triglyceride in hepatopancreas was increased, and cholesterol was decreased with the increasing dietary lipid. Pyruvate kinase and AMPK mRNA expression were highest in shrimp fed the L12.85. Malondialdehyde in whole body was positively correlated with the dietary lipid levels. The mRNA expression of SOD and Caspase 3 was highest in shrimp fed the L12.85. After hypoxia stress, shrimp fed the L12.85 showed highest survival. The mRNA expression of superoxide dismutase and Akirin was highest in shrimp fed the L11.43 and L15.45, respectively. Based on the survival after 25‐day feeding trail and after the hypoxia stress, the optimal dietary lipid for postlarval L. vannamei should be 118–124 g/kg.

Dietary lipid levels affected growth performance, lipid accumulation, inflammatory response and apoptosis of japanese seabass (lateolabraxjaponicus)

“…In this study, MDA contents in plasma and liver were increased with the increasing dietary lipid levels, which revealed that lipid peroxidation and oxidative stress were increased in fish fed high‐fat diet. Similar results were found in largemouth bass (Guo et al, 2019; Yin et al, 2020) and white shrimp (Xie et al, 2019). Oxidative stress usually is relieved by the oxidative defence system, SOD is one of the most important anti‐oxidative enzymes (Xie et al, 2016).…”

“…In present study, SOD activities in plasma and liver decreased in Japanese bass fed a high‐fat diet. SOD activities were also decreased in shrimp and largemouth bass fed high‐fat diet (Xie et al, 2019; Yin et al, 2020), and the oxidative defence system of tilapia and blunt snout bream were impaired by high‐fat diet (Jia et al, 2020, Dai et al, 2019b). These results indicated that fish may have limited ability to alleviate oxidative stress induced by high‐fat diets.…”

Use of biofloc technology in shrimp aquaculture: a comprehensive review, with emphasis on the last decade

“…About 5.6 to < 6.0% dietary lipids were found sufficient for optimum performance. However, these values are much lower than that reported by other authors (Zhang et al 2013;Xie et al 2019), where the lipid requirements of L. vannamei in traditional systems range from 10-12.4%. These findings indicate that dietary lipids can be significantly reduced in BFT-raised shrimps compared to those reared in traditional, clear-water systems.…”

“…2013; Xie et al . 2019), where the lipid requirements of L. vannamei in traditional systems range from 10–12.4%. These findings indicate that dietary lipids can be significantly reduced in BFT‐raised shrimps compared to those reared in traditional, clear‐water systems.…”

Can dietary with a taurine supplement improve lipid utilization, growth performance, haemolymph parameters and immune responses of white shrimp ( Litopenaeus vannamei )?

“…Similarly, excessive dietary lipid was reported to reduce FI of white shrimp (Xie et al, 2019;Zhang et al, 2013;Zhu et al, 2009). In this study, survival was not affected by lipid levels in the diet, which was also reported in previous studies with different lipid levels on white shrimp (Xie et al, 2019;Zhu et al, 2018).…”