Open AccessOptimal dietary lipid requirement of postlarval white shrimp, Litopenaeus vannamei in relation to growth performance, stress tolerance and immune response
Author(s) -
Xie Shiwei,
Wei Dan,
Fang Weiping,
Wan Migen,
Guo Tianyu,
Liu Yongjian,
Yin Peng,
Tian Lixia,
Niu Jin
Publication year - 2019
Publication title -
aquaculture nutrition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.941
H-Index - 79
eISSN - 1365-2095
pISSN - 1353-5773
DOI - 10.1111/anu.12937
Subject(s) - shrimp , litopenaeus , biology , malondialdehyde , hepatopancreas , penaeidae , weight gain , triglyceride , zoology , lipid metabolism , food science , endocrinology , cholesterol , medicine , oxidative stress , biochemistry , fishery , body weight , crustacean , decapoda
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.