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Evaluation of safflower meal as a protein source in diets of rainbow trout [ Oncorhynchus mykiss, Walbaum, 1792)]*
Author(s) -
Ustaoglu Tiril S.,
Kerim M.
Publication year - 2015
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/jai.12807
Subject(s) - rainbow trout , biology , meal , fish meal , feed conversion ratio , nutrient , composition (language) , ingredient , weight gain , zoology , body weight , protein efficiency ratio , food science , fishery , fish <actinopterygii> , ecology , endocrinology , linguistics , philosophy
Summary The effects of different levels of safflower meal (a residue of the plant oil extraction process) in diets of rainbow trout ( Oncorhynchus mykiss ) on growth performance, nutrient digestibility and body composition were investigated. Four different diets containing 0% (Control group), 10% (Diet 1), 15% (Diet 2) and 20% (Diet 3) safflower meal were formulated for the fish with a mean weight of 132.70 ± 0.75 g fed for 70 days. At the end of the experiment, there were no significant differences among dietary treatments for weight gain, specific growth rate and feed conversion ratio (P > 0.05). There were also no differences in the digestibility of crude protein and crude lipid between groups (P > 0.05). Supplementation of safflower meal in the diets also had no adverse effects on body composition. The results indicate that safflower meal is a promising feed ingredient and can be used up to a concentration of 20% in the rainbow trout diet with no adverse effects on growth performance, nutrient digestibility or body composition.