Effects of Temperature and Salinity on the Growth and Activities of Antioxidant Enzymes of Cobia (Rachycentron canadum) Juveniles

作者：Hui Zhou · 发表于：Journal of Guangdong Ocean University · 年份：2007 · 被引用次数：7 · 研究领域：Aquaculture Nutrition and Growth、Physiological and biochemical adaptations、Aquaculture disease management and microbiota

Two-factor-intersecting experiment was designed to evaluate the effects of temperature and salinity on the antioxidant enzymatic activities in the muscles of cobia (Rachycentron canadum) juveniles under the laboratory conditions. In this experiment three levels of water temperature(26, 29, 32) were set, and four levels of salinity(11, 19, 27, 35) were set respectively. Two factors engendered 12 combinations in all on each level. The cobia juveniles had been reared in the glass fiber tanks for 20 days. Then the fish samples were obtained randomly from each tank to examine the activities of SOD (Superoxide dismutase), CAT (Catalase) and GPX (Glutathione Peroxidase). The results showed that salinity induced adaptive responses such as increase in the antioxidant enzymatic activities, mainly those of SOD and CAT, as well as in GPX values. The activities of SOD,CAT and GPX increased from 17.74±3.38, 19.44±2.66 and 13.70±2.99 U/mg at 35 to 30.14±1.76, 35.63±10.59 (P0.05) on the activities of SOD and CAT. Except temperature, the salinity and interaction all had significant effect (P0.05) on the activity of GPX.