Levels of Soybean Oil and Time of Treatment for Nile Tilapia: a Factorial Design for Total n-3 Fatty Acids, n-6/n-3 and PUFA/SFA Ratios
AUTOR(ES)
Lopes, Ana P., Schneider, Vanessa V. A., Montanher, Paula F., Figueiredo, Ingrid L., Santos, Hevelyse M. C., Maruyama, Swami A., Araújo, Angela M. M., Visentainer, Jesuí V.
FONTE
J. Braz. Chem. Soc.
DATA DE PUBLICAÇÃO
2015-03
RESUMO
A 22 factorial design (two factors with two levels, in triplicate) was performed to investigate the influence of factors A (soybean oil content in supplemented diet, at 2.1 and 4.2%) and B (time of treatment, 15 and 30 days) in three responses [(a) total n-3 fatty acids; (b) n-6/n-3 ratio; and (c) polyunsaturated fatty acids (PUFA)/saturated fatty acids (SFA) ratio] from lipids of Nile tilapia submitted to experimental treatment. Normality of residuals was assessed through statistical tests. Factors A and B were significant in all obtained regression models, while AB interaction was not a significant contributor for PUFA/SFA response. ANOVA and response surfaces obtained from factorial design indicated best results in tilapia that received the diet containing 4.2% of soybean oil during 30 days.
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