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ACTIVITIES OF PHOSPHATASE IN EGGS AND OVARIAN FLUIDS AND ITS CORRELATION WITH THE FERTILIZATION RATE DURING THE REPRODUCTIVE CYCLE OF TURBOT(SCOPHTHALMUS MAXIMUS)
Author(s): 
Pages: 1530-1535
Year: Issue:  6
Journal: Oceanologia et Limnologia Sinica

Keyword:  turbot Scophthalmus maximuseggovary fluidsalkaline phosphataseacid phosphatasefer-tilization rate;
Abstract: We investigated the activity and variation of phosphatase in eggs and ovarian fluids during the reproductive cycle of turbot(Scophthalmus maximus L.), and explored whether and how phosphatase activity is influenced by fertilization rate. Results of experiments demonstrate that the activity and variation of the alkaline phosphatase and acid phosphatase in eggs was opposite in general to those in ovarian fluid. In eggs, alkaline phosphatase activity in ovulated metaphase was significantly lower than those of the early and late stage of ovulation. In contrast, acid phosphatase activity was strikingly higher than those of the early and late stage of ovulation. In addition, we found that the alkaline phosphatase activity in both eggs and ovarian fluid were closely related to fertilization rate, and acid phosphatase activity in ovarian fluid was much affected by fertilization rate. Therefore, activities of both alkaline and acid phosphatases in eggs and acid phosphatase activity in ovarian fluid were significantly related to fertilization rate, which may be applied to indicate the quality of turbot eggs.
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