珠江口鱼类群落结构的时空变化

根据1986～1987年珠江口及其邻近水域渔业资源的周年月份调查数据,运用MVSP软件包中的聚类分析和主坐标分析对珠江口鱼类群落的时空变化进行定量分析,描述珠江口鱼类群落的季节变化和区域变化特征,把珠江口从时空上划分为4个季节和5个水域,并与传统的划分方法作比较,讨论了这种分析结果的合理性。综合考虑个体数、重量、出现频率等因素,把珠江口鱼类的优势种确定为优势度大于1000的丽叶鲹、棘头梅童鱼、凤鲚、银鲳、杜氏棱鳀、带鱼、黄斑鲾和赤鼻棱鳀等8种,分析了优势种的区域和季节变化。

Spatial and temporal variations of fish community structure in the Pearl River Estuary waters

Based on monthly fishery resources investigation data of demersal trawl from 1986~1987 in the Pearl River Estuary and adjacent waters,the paper quantitatively analyzed variation of fish community of various species by cluster analysis and principal coordinates analysis of a package of MVSP. The result described seasonal and spafial variations and showed that the waters can be divided into four seasons in temporal and five waters types in spatial,and compared with the traditional divided idea,and the rationality of the result was discussed. In addition,eight species of Caranx kalla,Pampus argenteus,Collichthys lucidus,Coilia mystus,Thrissa dussumieri,Trichiurus japonicus,Leiognathus bindus,Thrissa kammalensis were defined to be dominant species of fishes in the Pearl River Estuary by comsidering factors of individual,weight and frequeucy,and the seasonal and spatial variations of the dominant species were analyzed.