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- Title
Effects of dietary astaxanthin on growth, antioxidant capacity and gene expression in Pacific white shrimp Litopenaeus vannamei.
- Authors
Zhang, J.; Liu, Y.‐J.; Tian, L.‐X.; Yang, H.‐J.; Liang, G.‐Y.; Yue, Y.‐R.; Xu, D.‐H.
- Abstract
Pacific white shrimp Litopenaeus vannamei (1050 individuals with initial weight of 1.01 ± 0.001 g) were fed either control diet or one of six dietary astaxanthin ( AX) concentration (25, 50, 75, 100, 125 and 150 mg kg−1) diets for 56 days in 35 tanks (30 shrimp per tank). After 56 days of culture, shrimp-fed AX125 and AX150 diets had higher ( P < 0.05) weight gain, specific growth rate, total antioxidant status and lower ( P < 0.05) superoxide dismutase ( SOD), catalase ( CAT) than shrimp fed control diet. After low dissolved oxygen stress for 1 h, survival rate of shrimp fed AX75, AX100, AX125 and AX150 diets was higher ( P < 0.05) than that of shrimp fed control diet. Hypoxia inducible factor-1α ( HIF-1α), cytosolic manganese superoxide dismutase ( cMnSOD) and CAT mRNA expression levels of shrimp fed seven diets were significantly down-regulated under hypoxia than under normoxia, but their expression levels were higher under hypoxia in shrimp fed AX-supplemented diets than in shrimp fed control diet. About 70-kDa heat-shock protein ( Hsp70) mRNA expression level of shrimp fed seven diets was significantly up-regulated under hypoxia than under normoxia, but its expression level was lower under hypoxia in shrimp fed AX-supplemented diets than in shrimp fed control diet.
- Subjects
ASTAXANTHIN; WHITELEG shrimp; ANTIOXIDANTS; GENE expression; CRUSTACEAN foods; CRUSTACEAN growth; WEIGHT gain
- Publication
Aquaculture Nutrition, 2013, Vol 19, Issue 6, p917
- ISSN
1353-5773
- Publication type
Article
- DOI
10.1111/anu.12037