【摘要】 依据1997～2000年东海中南部(25°30′～29°00′N,120°30′～127°00′E)四个季节的底拖网调查资料,运用聚类分析和非度量多维标度(NMDS)的方法分析了东海中南部鱼类群聚结构的空间特征,结果显示,东海中南部鱼类群聚大致可分为近海群聚和外海群聚.在不同季节两个群聚的种类组成保持了相对的稳定,并且具有一定的持续性.近海群聚的特征种类为带鱼、发光鲷等.外海群聚的特征种类主要为黄鳍马面鲀、短尾大眼鲷、黄鲷等.鱼类群聚与环境因子水深有较好的相关关系.更多还原

【Abstract】 On the basis of data collected with bottom trawl survey during 1997 and 2000 in the mid-southern East China Sea (25°30′~29°00′N,120°30′~127°00′E), the spatial pattern of fish assemblages structure was analyzed through,hierarchical cluster analysis and non-metric multidimensional scaling. Two main fish assemblage styles were identified in the mid-southern East China Sea, which were offshore group and offlying group. These assemblages were relatively persistent, retaining their species compositions over season. Hairtail (Trichiurus japonicus Temminck et Schlegel,1844) and Glowbelly (Acropoma japonicum G nther, 1859) are dominant species of offshore group, while lesser-spotted leatherjacket [Thamnaconus hypargyreus (Cope,1871)],red bigeye (Priacanthus macracanthus Cuvier et Valenciennes, 1829),yellowback seabream [Taius tumifrons (Temminck et Schlegel, 1842)] are dominant species of offlying group. The relationships between fish assemblages and environmental variables—depth, bottom temperature and bottom salinity—were examined, and the depth was found to be primary variable influencing fish assemblage in the mid-southern East China Sea.更多还原