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Growth performance and body composition of sub‐yearling Persian sturgeon, ( Acipenser persicus , Borodin, 1897), fed different dietary protein and lipid levels
Author(s) -
Mohseni M.,
Sajjadi M.,
Pourkazemi M.
Publication year - 2007
Publication title -
journal of applied ichthyology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.392
H-Index - 62
eISSN - 1439-0426
pISSN - 0175-8659
DOI - 10.1111/j.1439-0426.2007.00866.x
Subject(s) - acipenser , biology , sturgeon , dietary protein , zoology , composition (language) , fish <actinopterygii> , food science , fishery , linguistics , philosophy
Summary In order to evaluate the protein and energy requirement of Persian sturgeon ( Acipenser persicus ) sub‐yearlings, eight experimental diets containing two protein levels (40% and 45%) and four lipid levels (10%, 15%, 20% and 25%) were tested. Sturgeons ( W 0 = 136.8 g) were fed the experimental diets to satiation four times daily for 150 days, resulting in a final mean weight of 375.8 g. Growth was significantly affected by lipid content of the diets. At 40% protein level, weight gain and specific growth rate (% per day) were significantly improved (P < 0.05) by increasing the dietary lipid (energy) content. Protein efficiency ratio (PER) was significantly affected by different dietary treatments for each dietary protein level tested, reaching a mean value of 3.58 in fish fed high lipid diets and a PER of 2.77 in low lipid diets. Results obtained in the present study suggest that the optimum dietary protein content for Persian sturgeon is 40%, with an estimated optimum protein‐to‐energy ratio of 18–20 mg kJ −1 .