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| Effects of Dietary Selenium Sources on Growth,Body Composition and Antioxidant Performance of Juvenile Pacific White Leg Shrimp Litopenaeus vannamei |
| LI Xiaoxia,CHEN Feng,PAN Qing,WANG Ling,FENG Tian,GAN Lian,FU Jinghua,CAO Junming |
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Abstract A feeding trail was conducted to evaluate the effects of dietary selenium sources on grow th , body composition and antioxidant capacity of juvenile Pacific white leg shrimp Litopenaeus vannamei .The healthy shrimp with initial body weight of (0 .41 ± 0 .01) g were randomly divided into 4 groups with 3 rep‐licates per treatment and fed a basal diet (control group) and the diets supplemented with 0 .30 mg/kg se‐lenium from sodium selenite(Na2SeO3),seleniumyeast(Se‐Y)andselenomethionine(Se‐M)withseleni‐um levels of 0 .25 ,0 .50 ,0 .56 ,and 0 .50 mg/kg ,respectively ,at water temperature of (29 .0 ± 1 .3) ℃ for 56 days .There was significantly higher growth performance in the shrimp fed Se‐M diet than the shrimp fed the control diet and Na2 SeO3 diet (P<0 .05) .The shrimp fed the diet supplemented with selenium showed higher body protein content compared to the animals fed the control diet ,while the fat content in the shrimp showed the opposite trend (P<0 .05) .The serum total antioxidative capacity and glutathione peroxidase capacity were found to be significantly increased in the shrimp fed the diets containing selenium supplements compared with the shrimp in the control group (P<0 .05) ,without significant differences a‐mong test groups (P>0 .05) .The shrimp fed Se‐M diet had the maximal serum malondialdehyde content among these treatments (P<0 .05) .The findings indicate that supplementation of 0 .30 mg/kg selenium can improve grow th and antioxidant performance of juvenile Pacific w hite leg shrimp ,more effective in sel‐enomethionine than in selenium yeast and sodium selenite .
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Received: 25 March 2016
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