Spatial-temporal Pattern to Fishing Ground of White Croaker in Bohai,Yellow and East China Seas

The distribution and spatial patters of white-croaker fishing grounds in Bohai,Yellow and East China Seas were studied according to the capture production from 1971 to 1982.It shows that there are three types of white-croaker fishing ground,that is the spawning grounds which were mainly located in coastal waters of the East China Sea during spring,feeding grounds which were concentrated on the northern part of the East China Sea and the southern of the Yellow Sea during summer,and the wintering grounds,including two parts: the northern one locating in the eastern offshore of the Yellow Sea and the southern one concentrating on the southern nearshore of the East China Sea.The capture production of white-croaker in the East China Sea had increased insignificantly and exceeded the production of the Bohai and Yellow Seas since 1978.In addition,the main fishing grounds for white-croaker in the East China Sea were located in the Changjiang River estuary during May-September and the northern nearshore of the Yellow Sea and center of the Bohai Sea during November.During the fishing season,these places,with intensive fish group and concentrated production,were high-quality fishing grounds.The spatial distribution pattern of the fishing grounds for white-croaker in 1971-1982 was similar to the current,hence the research on white-croaker in the characteristics of fishing grounds,fishing season and the contribution of fish distribution pattern mode is of important reference value to the present protection of the fish resource.