中文摘要：

这研究的目的在夏天，冬季和春天期间是基于数据在北华南海调查 ichthyoplankton 差异和丰富的季节的变化镇定的。总共，幼虫的鱼的 95 taxa 被识别。种类的最大的数字在春天被记录，到夏天和冬季列在后面。种类的数字在夏天和春天的调查时期期间从 Leizhou 半岛的东方主要在沿海的水里，但是在被散布到海南岛的东南近海在冬季期间流水。许多幼虫的鱼在冬季是最低的，在春天增加了，并且到达了在夏天的最大值。高许多幼虫的鱼通常与深线被限制为沿海的水不到 50 m。幼虫的鱼丰富，丰富和差异索引的季节的变化是重要的(P < 0.001 ) 。Carangidae 是在夏天和冬季的最普通、丰富的 taxon Sardinella sp， Thrissa mystax 和 Leiognathus sp。在春天是主导的。高差异和许多幼虫的鱼可能在春天和夏天被归因于增加的温度和沿海的 upwelling。

英文摘要：

The objective of this study was to investigate the seasonal variations of ichthyoplankton diversity and abun-dance in the northern South China Sea based on the data collected during summer, winter and spring. In total, 95 taxa of larval fishes were identified. The greatest number of species was recorded in spring, followed by summer and winter. The number of species was distributed mainly in the coastal waters from the east of Leizhou Peninsula to the southeast of Hainan Island during the surveyed periods of summer and spring, but in the offshore waters during winter. The abundance of larval fish was lowest in winter, increased in spring, and reached the maximum in summer. High abundance of larval fish was generally restricted to coastal waters with the isobaths less than 50 m. Seasonal variations of larval fish richness, abundance and diversity index were significant （P〈0.001）. Carangidae was the most common and abundant taxon in summer and winter, whileSardinella sp.,Thrissa mystax andLeiognathus sp. were dominant in spring. High diversity and abundance of larval fish might be attributed to increased temperature and coastal upwelling in spring and summer.