EFFECT OF ARTIFICIAL STOCKING OF SILVER CARP AND BIGHEAD IN LAKE TAIHU

Abstract:

This paper reports the relationship between artificial stocking and yield of silver carp and bighead in Lake Taihu in 1992 and 1993. A total amount of 9. 23 million fingerlings (weighed 252. 16 tons ) of silver carp and bighead together were stocked into Lake Taihu in 1992. About 1379. 71 tons of silver carp and bighead were caught in this year.It occupied 9. 99% of total catch of Lake Taihu's fisheries. in 1993. the stocking quantity and stocking weights were increased to 11.32 million fingerlings and 354. 24 tons respectively. The yield of silver carp and bighead was also increased to 1670. 1 tons. It occupied 11. 87% of total catch from Lake Taihu of this year. The major effect of artificial stocking of silver carp and bighead in Lake Taihu was obtained in these .two years. The results have positive role for stabilizing and increasing yield in the Lake Taihu's fisheries and active significance for regulating and improving structure of . fisheries resources of Lake Taihu. There is potential for increasing production of silver carp and bighead according to the environmental conditions, abundance of plankton and growth performences of these two species, the stocking density could be increased further. The factors affected on stocking effect are discussed.