中文摘要：

利用2012–2013年三都澳渔业资源的定置张网调查资料,应用物种多样性指数、数量生物量比较曲线（ABC曲线）及鱼类分类多样性指数等方法分析三都澳游泳动物种类组成特征和群落结构的稳定性。调查中共出现游泳动物195种,隶属于17目64科125属,其中鱼类143种,甲壳类47种,头足类5种。大黄鱼（Larimichthys crocea）在三都澳4个航次的调查中都是最主要的优势种类,其他优势种类还包括叫姑鱼（Johnius belengerii）、白姑鱼（Argyrosomus argentatus）、虾虎鱼类和一些甲壳类。大黄鱼多为养殖群体,其他优势种类的共同特征是个体小,繁殖周期短,生物量季节或年际间波动剧烈。物种多样性分析表明,三都澳游泳动物群落平均Shannon-Wiener多样性指数为2.61,9、10月高,1、5月低。ABC曲线分析表明,4次调查中群落结构存在明显的变化,繁殖群体的补充、个体生长、捕捞、伏季休渔等是影响群落结构稳定性的因素。本次研究表明,大黄鱼生物量的比例与Shannon-Wiener多样性指数呈极显著负相关（P〈0.01,R=–0.890）,与种类数呈显著负相关（P〈0.05,R=–0.563）。结合近年来的调查数据,统计得到三都澳的现存鱼类约224种,其平均分类差异指数（△＋）为59.5,分类差异变异指数（∧＋）为260.8。相对于中国沿海其他海域,三都澳鱼类群落分类学范围较小,且群落间的分类地位关系极不均匀,群落抗干扰的能力较差。

英文摘要：

In order to analyze the species composition and evaluate the stability of nekton community structure in Sandu Bay of Fujian Province, species diversity, an Abundance Biomass Comparison（ABC） curve and taxonomic diversity were described based on a net fishing survey conducted in Sandu Bay from October 2012 to September 2013. A total of 195 species belonging to 125 genera, 64 families and 17 orders were recorded including 143 fish species, 47 crustacean species and 5 cephalopod species. Larimichthys crocea was the most dominant species identified in all four surveys and most were escaped groups from fish farms. The other dominant species included Johnius belengerii, Argyrosomus argentatus, gobies, and several crustacean species, which were characteristized by small body size, short breeding period and seasonal or annual drastic fluctuations in biomass. The average Shannon-Wiener diversity index in Sandu Bay was 2.61, and higher in September and October than in January and May. ABC curve analysis showed that the community structure had obvious seasonal changes and the impacting factors may include internal factors and external factors such as the supplement of breeding groups, individual growth, fishery production, and summer fishing moratoriums. This study revealed that the biomass proportion of the large yellow croaker has a very significant negative correlation with Shannon-Wiener diversity index（P〈0.01, R = –0.890） and a significant negative correlation with species number（P〈0.05, R = –0.563）. Combined with survey data from recent years, there were 224 fish species in Sandu Bay; based on this data, the average taxonomic distinctness（△＋） and the variation in taxonomic distinctness（∧＋） were tested. The result showed that the value of △＋ in Sandu Bay was 59.5 and the value of ∧＋ was 260.8. Compared with other coastal waters in China, the average taxonomic range in Sandu Bay was relatively narrow and the taxonomic status was extremely uneven, indicating the anti-interferenc