Effect of Salinity on Hemolymph Osmotic Pressure, Sodium Concentration and Na+-K+-ATPase Activity of Gill of Chinese Cra
The effects of salinity on hemolymph osmotic pressure, Na+ concentration and Na+-K+-ATPase activity of gill of Chinese crab Eriocheir sinensis were studied. The results showed that hemolymph osmotic pressure and Na+ concentration increased significantly (P＜0.05), and the Na+-K+-ATPase activity of gills decreased significantly (P＜0.05) when salinity increased from 0 to 16. The hemolymph osmotic pressure and Na+ concentration in each treatment group rose remarkably at 0.125 d or 0.25 d, while the Na+-K+-ATPase activity of gill reduced gradually with increased experiment time in 3 d. Then the three parameters remained at a constant level after 0.25 d, 0.125 d and 3 d, respectively, and higher hemolymph osmotic pressure, higher Na+ concentration and lower Na+-K+-ATPase activity of gill occurred at higher salinity. The effect of salinity change on protein concentration of hemolymph was indistinct (P＞0.05); However, the protein concentration decreased gradually with the increase of salinity from 0.25 d to 1 d, and then tended to be stable from day 1 to day 15.
作 者： LIU Hongyu PAN Luqing Lü Fu 作者单位： The Key Laboratory of Mariculture of Chinese, Ministry of Education, Ocean University of China,Qingdao 266003, P. R. China 刊 名： 中国海洋大学学报（英文版） ISTIC 英文刊名： JOURNAL OF OCEAN UNIVERSITY OF CHINA 年，卷(期)： 2008 7(1) 分类号： P7 关键词： salinity Eriocheir sinensis osmotic pressure Na+ concentration gill Na+-K+-ATPase