Suitable Ratio of Soybean Phospholipid Oil to Rapeseed Oil in the Diet of Juvenile Large Yellow Croaker(Larimichthys crocea)

• Published in: Yuye kexue jinzhan Vol. 39; no. 4; pp. 56 - 65
• Main Author: Yan, Chunwei
• Format: Journal Article
• Language: Chinese
• Published: Beijing 01.01.2016
• Subjects: Fatty acids; Larimichthys croceus; Marine
• ISSN: 2095-9869

Four isonitrogenous, isoenergetic, and isolipidic diets with varying ratios(0 : 6, 2 : 4, 4 : 2, and 6 : 0) of concentrated soybean phospholipid oil(P) to refined rapeseed oil(R)(P0R6, P2R4, P4R2, and P6R0) were formulated to determine the suitable ratio of soybean phospholipid oil to rapeseed oil in the diet of juvenile large yellow croaker(Larimichthys crocea). Each diet was randomly assigned to triplicate sea floating cages of 40 fish [initial body weight(20.84±0.05) g]. Fish were fed to apparent satiation twice daily(5:30 and 16:00) over 51 d. The results suggested that the survival rates of tested fish were higher than 91%, with no significant differences among treatments(P>0.05). The special growth rate was significantly higher with fish fed P2R4, compared with those fed P4R2 and P6R0(P<0.05). Higher lipid and protein deposition rates were found in P2R4-fed fish compared with those fed the other treatments(P<0.05). Contents of crude protein in whole body and muscle were not significantly affected by the