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چکیده
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A 30-day study was conducted to evaluate effects of dietary soy lecithin (SL) on growth, reproductive performance and health indices in white-leg shrimp (Litopenaeus vannamei) brooders (28.6 ± 0.2 g). Four different SL levels including 0 (control), 2, 4 and 6% was included to a basal diat contained Ca. 50% protein and 10% lipid. At the end of feeding trial, shrimp brooders fed 4% SL had the highest growth performance and the lowest latency period compared to the other experimental groups. Eggs diemater in brooders fed diets contained 4 and 6 % SL was higher than the other groups. Srimp brooders fed SL supplemented diets had higher plasma glucose than the control group. Brood stocks fed 4 and 6% SL diets had the highest and the lowest plasma total cholesterol and high density lipoproteins, respectively and other treatments showed intermediate values. In addition, shrimp brooders fed 2 and 4% SL diets had higher plasma triglycerides than those fed the control and 6% SL diets. Except for plasma inorganic phosphorous, which was higher in the control group than shrimp fed SL supplemented diets, other plasma electrolytes were not changed in different groups. Overall, the results of the current study suggesting that supplementing diet with SL at 4% may improve growth and reproductive performances in L. vannamei female brooders.
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