中文摘要：

根据2014年苍南南部沿岸海域春季（5月）和秋季（11月）的渔业资源调查资料,采用生态位测度、方差比率法、基于2×2列联表的χ2检验和联结系数（AC）等方法分析群落物种间的相互关系.结果表明：该海域主要游泳动物按生态位宽度值可划分为广生态位种、中生态位种和窄生态位种3大类,其中广生态位种包括龙头鱼、三疣梭子蟹、口虾蛄等5种,中生态位种包括棘头梅童鱼、哈氏仿对虾和细巧仿对虾等8种,窄生态位种包括日本蟳、六丝钝尾鰕虎鱼和葛氏长臂虾等10种;种对间生态位重叠值差异较大,最大值和最小值分别为0.93和0,部分游泳动物间可能存在资源利用性竞争.方差比率法分析表明,主要游泳动物总体呈显著正关联,其中有78个种对间的联结性达到显著水平（χ2≥3.841）,联结系数（AC）中正显著联结的种对多于负显著联结.

英文摘要：

In this paper,the interaction between the species population were analyzed based on the data of major nekton species in the south coastal waters of Cangnan in spring and autumn 2014. A series of methods including niche breadth,niche overlap,χ2- test and association coefficient（ AC）based on a 2 × 2 contingency table were used. The results showed that the major nekton species in the south coastal waters of Cangnan were classified into three groups,i. e. wide niche breadth species,moderate niche breadth species and narrow niche breadth species based on the niche breadth values. The wide niche breadth species of nekton were Harpodon nehereus,Portunus trituberculatus,mantis shrimp and other 2 species. The moderate niche breadth species of nekton were Collichthys lucidus,Parapenaeopsis hardwickii,Parapenaeopsis tenella and other 5 species. While the species with narrow niche breadths were Charybdis japonica,Amblychaeturichthys hexanema,Palaemon gravieri and other 7 species. There were great differences in the niche overlap values among the major nekton populations,with the maximum value of 0. 93 and the minimum of 0,which indicated that resource utilization competition in some nekton might exist. The results of variance ratio analysis for major nekton in the south coastal waters of Cangnan showed that they were significantly positively correlated. χ2- test results showed that there were significantly interspecific association for 78 species pairs（ χ2≥3. 841）,among which more association coefficients（ AC） of species pairs are positive.