利用 1 997年～ 1 999年“大洋一号”调查船在中国多金属结核开辟区用邦哥网所采集的样品 ,对仔稚鱼的种类组成、密度的平面分布和年间变化及其与环境因子的关系进行了研究。结果表明 :中国开辟区共有 2 2科 6 1种仔稚鱼 ,其中大洋性发光鱼类灯笼鱼科的种类最多 ,达1 7种 ,约占总种类数的 2 8% ,其次是钻光鱼科 (6种 )、金枪鱼科 (6种 )和拟白鲑科 (5种 ) ,分别约占总种类数的 1 0 %、 1 0 %和 8%。东、西两区的种类组成有较大的差异 ,共有种仅为 1 7种 ,东区种类数 (48种 )明显多于西区种类数 (3 0种 )。仔稚鱼的密度有明显的空间和时间变化 ,东区仔稚鱼的密度高于西区 ,东区 1 999年仔稚鱼的密度约为 1 997年的 5倍 ,西区 1 999年仔稚鱼的密度约为 1 998年的 3倍。仔稚鱼密度的年间变化可能与 El Nino事件有关 Using the samples collected by the “Ocean One” survey vessel from China ’s polymetallic nodule pioneer area from 1997 to 1999 using the samples collected by Bangge Network, the species composition and density distribution of larvae and their annual variations and their relation to the environment The relationship between factors was studied. The results showed that there were 21 species of larvae of juvenile fish from 21 families in China’s open-up area. Among them, the species of marine fish were the largest in the Pacific Ocean, reaching 17 species, accounting for 28% of the total species, followed by Dried Beagles (6 species), Tuna (6 species) and Pseudomonas species (5 species), accounting for about 10%, 10% and 8% of the total species, respectively. The species composition of the eastern and western regions are quite different. There are only 17 species in common and 48 species in the eastern region are significantly more than the species in the western region (30 species). The density of juvenile larvae showed obvious spatial and temporal changes. The density of juveniles in eastern district was higher than that in the west. The density of juveniles in east Guangdong in 1999 was five times that of 1997, and the density About three times in 1998. The annual variation of larval density may be related to the El Nino incident