Experimental study on the adaptability of juvenile Myxocyprinus asiaticus to the estuarine waters

Abstract

Abstract: The adaptability of juvenile Myxocyprinus asiaticus to the estuarine waters was experimentally studied by investigating the survival ratios, the superoxide dismutase (SOD) activities in its' liver, the Na⁺/K⁺-ATPase activities response in its’ gill to different salinity stresses and joint stresses of nitrate and phosphate. The result showed that, the survival was 100% when the salinity was below 10.There were not significant differences of the SOD activities and the Na⁺/K⁺-ATPase activities between salinities 3 and 0 （p>0.05）, respectively. The survival was 100% when the water quality was better than Ⅳ. The SOD activities and the Na⁺/K⁺-ATPase activities in water quality Ⅳ was higher than that in Ⅱ and Ⅲ (p<0.05). In conclusion, juvenile Myxocyprinus asiaticus have strong adaptability when the salinity is below than 3 and water quality is superior to Ⅲ, and that means that the current environmental situation at the upper section of Yangtze Estuary can provide juvenile Myxocyprinus asiaticus with adaptive water quality to live.

Key words: Myxocyprinus asiaticus, salinity, nutrient salts, SOD, Na⁺/K⁺-ATPase

CLC Number:

WANG Feng-yi, LU Jian-jian. Experimental study on the adaptability of juvenile Myxocyprinus asiaticus to the estuarine waters[J]. Journal of East China Normal University(Natural Sc, 2012, 2012(1): 19-26.

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