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| Physiological Responses of Juvenile Japanese Croaker Nibea j aponica to Hydrogen Peroxide |
| ZHU Yun-hai,WANG Yue-bin,HU Ze-hui,CHAI Xue-jun |
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Abstract In this paper , the concentrations of total plasma protein , potassium (K ) , sodium (Na ) , chloride (Cl) ,plasma calcium (Ca) ,phosphorus (P) ,magnesium (Mg) ,plasma cortisol and plasma glucose ,and activities of superoxide dismutase (SOD) ,catalase (CAT ) and lysozyme (LZM ) were determined in juvenile Japanese croaker Nibea japonica 1 h ,24 h and 48 h after the juveniles were exposed to hydrogen peroxide with triplication at 26 ℃ . The results showed that there were no significant differences in total plasma protein , and K+ levels and LZM activity between the hydrogen peroxide exposure groups and the control group .The levels of plasma Ca2+ ,P and Mg2+ were recovered to the normal levels in the juveniles at 24 h hydrogen peroxide exposure . There were significantly higher concentrations of Na+ , Cl- and cortisol than those in the control group at 48 h hydrogen peroxide exposure .The juveniles exposed to hydrogen peroxide for 24 h had significantly higher activities of SOD and CA T than the juveniles in the control group did ,and recovered to normal levels at 48 h hydrogen peroxide exposure .Some indicators derived from hydrogen peroxide exposure were found to be relatively sensitive to hydrogen peroxide exposure and to be recovered to normal level in more than 48 h .
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Received: 25 April 2014
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