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  • Title: Effects of replacing fish meal with soybean meal on growth performance, feed utilization and physiological status of juvenile obscure puffer, Takifugu obscurus.
    Author: Ye H, Xu M, Liu Q, Sun Z, Zou C, Chen L, Su N, Ye C.
    Journal: Comp Biochem Physiol C Toxicol Pharmacol; 2019 Feb; 216():75-81. PubMed ID: 30414482.
    Abstract:
    An 8-week feeding trial was conducted to evaluate the growth performance, feed utilization and physiological status of obscure puffer, Takifugu obscurus (13.03 ± 0.14 g) fed diets in which fish meal (FM) was replaced with various levels of dehulled and defatted soybean meal (SBM): 0% (SBM0), 15% (SBM15), 30% (SBM30), 45% (SBM45), 60% (SBM60) and 75% (SBM75). No significant differences were observed in weight gain and specific growth rate (SGR) of fish when FM replacement level was lower than 30%, and the broken-line model of SGR showed the maximum replacement level was 40%. Fish fed the SBM-containing diets had a lower red blood cell value compared to the control. The hemoglobin and methemoglobin values showed a declining tendency as dietary SBM level increased. Plasma triacylglycerol, cholesterol and low-density lipoprotein cholesterol levels also showed a decreasing trend that was associated with the reduced crude lipid content of whole body as dietary SBM level increased. The activities of alanine aminotransferase and aspartate aminotransferase in fish fed the SBM-containing diets were all higher than those fed the control diet while glutathione peroxidase and catalase activities were lower than the control group. Results indicated that up to 40% FM protein, based on the broken-line analysis of SGR, can be replaced with SBM in diet for obscure puffer juveniles with supplemental lysine, methionine and taurine.
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