九龙江口鱼类浮游生物的生态

１９８７年３月到１９８８年２月在九龙江口的５个固定站位上，逐月进行鱼卵和仔，稚鱼调查的资料。结合１９８３年至１９８４年的鉴定资料进行分析，结果表明，该海区的鱼类生态结构系由淡水，半咸水，沿岸和海水鱼类等４种生态类型组成。鱼类主要产卵期为３－９月，盛期为５－８月。鱼卵数量以河口上游最多。种数则以河口下游较多。仔，稚鱼相对集中于河口中游，其数量和种数均为最多。在九龙江口放流，增殖或引进鱼类新种成功的机

Studies on estuarine ecology of ichthyoplankton of Jiulong River

The present paper identifies 14 species of fish egg belonging to 4 Orders,7 Farmily,11Genus,and 49 species of fish larvae belonging to 9 Orders,29 Family,27 Genus,from theJiulong River Estuary.The resuh shows that the fish ecological structure of the Jiulong River Estuary consistsof four different ecological groups:the fresh-water,brackish,neritic and coastal waterspecies.Eggs attain the maximum catch and the maximum species number in May;most of theeggs are species of Mugilidae(82.33%).Larvae and juveniles have the maximum catch inMay,and the maximum species number in June.The main spawning season is in March toSeptember. The number of individual eggs occurs largely in upper water and species number of eggsoccurs mainly downstream in the estuary;the estuaries midstream is the main feeding andgrowing sites for larvae and juveniles,it obtains the maximum number of individuals and themaximum number of species of larvae and juveniles.