Effects of stocking density on antioxidant status, metabolism and immune response in juvenile turbot (Scophthalmus maximus)
文献类型： 外文期刊
作者： Liu, Baoliang 1 ; Jia, Rui 2 ; Han, Cen 3 ; Huang, Bin 1 ; Lei, Ji-Lin 1 ;
作者机构： 1.Chinese Acad Fishery Sci, Yellow Sea Fisheries Res Inst, 106 Nanjing Rd, Qingdao 266071, Peoples R China
2.Nanjing Agr Univ, Wuxi Fisheries Coll, Wuxi 214081, Peoples R China
3.Dalian Ocean Univ, Coll Fisheries & Life Sci, Dalian 116023, Peoples R China
关键词： Scophthalmus maximus; Stocking density; Antioxidative enzymes; Metabolism; Gene expression
期刊名称：COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY C-TOXICOLOGY & PHARMACOLOGY （ 影响因子：3.228； 五年影响因子：3.289 ）
ISSN： 1532-0456
年卷期： 2016 年 190 卷
页码：
收录情况： SCI
摘要： This study was designed to evaluate the physiological and immune responses of juvenile turbot to stocking density. Turbot (average weight 185.4 g) were reared for 120 days in a land based recirculating aquaculture system (RAS) under three stocking densities: low density (LD, similar to 9.3-26.1 kg/m(2), initial to final density), medium density (MD, similar to 13.6-38.2 kg/m(2)) and high density (HD, similar to 19.1-52.3 kg/m(2)). Fish were sampled at days 0, 40, 80 and 120 to obtain growth parameters and liver tissues. No significant difference was detected in growth, biochemical parameters and gene expression among the three densities until at the final sampling (day 120). At the end of this trial, fish reared in HD group showed lower specific growth rate (SGR) and mean weight than those reared in LD and MD groups. Similarly, oxidative stress and metabolism analyses represented that antioxidants (superoxide dismutase (SOD), catalase (CAT), glutathione (GSH)) and metabolic enzymes (glycerol-3-phosphate dehydrogenase (G3PDH) and glucose-6-phosphate dehydrogenase (G6PDH)) clearly reduced in the liver of turbot reared in HD group. The gene expression data showed that glutathione S-transferase (GST), cytochrome P450 1A (CYP1A), heat shock protein 70 (HSP 70) and metallothionein (MT) mRNA levels were significantly up-regulated, and lysozyme (LYS) and hepcidin (HAMP) mRNA levels were significantly down-regulated in HD group on day 120. Overall, our results indicate that overly high stocking density might block the activities of metabolic and antioxidant enzymes, and cause physiological stress and immunosuppression in turbot. (C) 2016 Elsevier Inc. All rights reserved.
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