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Effects of graded levels of dietary vitamin E on striped surubim Pseudoplatystoma reticulatum
Author(s) -
Za Ricardo Basso,
Silva Tarcila Souza de Castro,
Cerozi Brunno da Silva,
Cyrino José Eurico Possebon
Publication year - 2018
Publication title -
aquaculture research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.646
H-Index - 89
eISSN - 1365-2109
pISSN - 1355-557X
DOI - 10.1111/are.13594
Subject(s) - biology , flesh , zoology , vitamin e , vitamin , completely randomized design , fishery , endocrinology , biochemistry , antioxidant
Vitamin E is important to animal health, growth, productive performance, fillet quality and immune systems. This study evaluated the effects of dietary vitamin E on flesh composition, growth, biochemical and immunological parameters of striped surubim, Pseudoplatystoma reticulatum . Prior to beginning of the feeding trial, fish were fed a vitamin E‐free control diet for 45 days to reduce body deposits. The trial was set up in a completely randomized design; diets containing 3.4; 28.4; 53.4; 103.4; 153.4 and 303.4 mg DL ‐α‐tocopherol acetate per kg of ration ( n = 3) were fed twice a day to apparent satiation, for 90 days. Juvenile striped surubim (38.1 ± 4.9 g and 17.5 ± 1.5 cm) randomly stocked in 18 plastic tanks (300 L; 10 fish per tank). Based on serum globulin content and liver and fillet deposition of vitamin E, inclusion of 166.6 mg/kg of DL ‐alpha tocopherol acetate in the diet is recommended to improve the immunological status and, probably, flesh quality of striped surubim.