Title: Effects of salinity on osmo-ionic regulation and enzyme activities in mature female Eriocheir sinensis
Abstract: Mature female Chinese mitten crabs( Eriocheir sinensis) were transferred from freshwater( control)to salinity environment( 12,25). Osmo-ionic regulation and Na / K-ATPase and alkaline phosphatase( AKP)activities were examined after 3,6,12,24,48,72,96,144 hours. Haemolymph osmolality showed an overall gradual increase after salinity transfer. Haemolymph Na+and Cl-concentrations of salinity groups presented earlier increase and later decrease trend with the increasing exposure time. Na+/ K+-ATPase decreased significantly at first and then increased remarkably,and reached a higher level after 96 h,but returned to the similar level of that of the freshwater group at the end of experiment. Alkaline phosphatase( AKP) activities in hepatopancreas decreased at first,and then increased after salinity transfer with the increasing exposure time. Enzyme activities showed a contrary trend in haemolymph under similar experimental conditions. Based on the above results,haemolymph osmolality and ionic concentration in mature female Chinese mitten crabs( E. sinensis) increased at first,and then decreased after salinity transfer.Enzyme activities could return to similar level of that in freshwater group. It is suggested that mature female Chinese mitten crabs could effectively regulate their metabolic level in short acclimation period after salinity increase.
Publication Year: 2013
Publication Date: 2013-01-01
Language: en
Type: article
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Cited By Count: 3
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