THE DYNAMIC ANALYSIS ON THE FISHERY STOCKS IN THE EAST CHINA SEA

Abstract:

The paper is presented by analyzing on the data of catch, fishing effort and other fishery statistical information. The results show that, although the total yield increases annually, the rate of yield increment is much slower than that of fishing effort incremenet, and especially the CPUE decreases gradually, indicating the poor resource abundance. By analyzing the catch composition, besides the utilization of the traditional fishery resoures, the pelagic fishery resources such as mackerels and scads, harvest fish, filefish, shrimp and crabs etc, and lower trophic level species are also obviously intensified to be exploited. Fishing structure has changed. Furthermore, after surplus production modeling, the MSY is about 1. 9E 6 ton, accordingly the fmsy is 2. 2-2- 7E 6 kilowatt. These data illustrate that present fishing effort is great high. In order to restore the marine resources in the East China Sea, measures must be carried out to make the fishing vessels cut by about 58%.