The Effects of Sub-lethal Dietary Mercury on Growth Performance,Bioaccumulation, and Activities of Antioxidant Enzymes in Sea Cucumber, <Emphasis Type="Italic">Apostichopus japonicus</Emphasis> |
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Authors: | Zequn Li Tongjun Ren Yuzhe Han Zhiqiang Jiang Yanan Hu Zhuoan Bai Lianshun Wang Jingyun Ding |
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Institution: | 1.Key Laboratory of Mariculture & Stock Enhancement in North China’s Sea, Ministry of Agriculture,Dalian Ocean University,Dalian,China |
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Abstract: | Triplicate groups of sea cucumbers (4.83?±?0.15 g) were exposed to one of the four nominal concentrations of dietary mercury 0 (control), 67.6, 338, and 676 mg/kg dry weight, and actually total mercury were 17.55, 87.00, 275.50, 468.50 mg/kg, respectively; Table 3] for 21 days. Mercury accumulation in the intestine showed the greatest mercury burden (77.96?±?1.20 mg Hg/kg tissue wet weight basis). However, survival rate (SR) was not affected. Body weight gain after the 676 mg Hg/kg treatment was significantly lower than the control group. The feed conversion rate of the 676 mg Hg/kg treatment group was significantly higher than the control group. Additionally, the superoxide dismutase (SOD) and total antioxidant capacity (T-AOC) of sea cucumbers decreased as the mercury dose increased. SOD, T-AOC and alkaline phosphatase of the 676 mg Hg/kg treatment group were significantly lower than the control group. However, there were no significant differences between the four groups in acid phosphatase and catalase (CAT) activity. |
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