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中文摘要：
根据1997～2000年东海23°30′～33°N、118°30′～128°E海域4个季节海洋调查资料，采用拟合曲线方法，探讨浮游多毛类对温度和盐度的适应特征，分析不同物种的牛态类型。结果表明，东海4季鉴定到种的浮游多毛类共有20种．其中，游蚕（Pelagobis longicirrata）、秀丽浮蚕（Tomopteris elegans）、等须浮蚕（Tomopteris duccii）、方背鳞虫（Lepidonotus squareatus）和岛居拟帚毛虫（Lygdamis nesiotes）等对温度变化小敏感，是广温种；秀丽浮蚕还具有广泛的盐度适应，是广盐种；太平洋浮蚕（Tomopteris pncifica）是热带大洋种，可作为暖流指示种；丝鳃稚齿虫（Prionospio malmgreni）是广温近海种；其它物种为亚热带外海种．与东海大多数浮游动物类群相同，多毛类以亚热带外海种为主．但是多毛类中广温种占有较大的比例，这是该类有别于其它浮游动物类群的重要特征．图2表3参20
英文摘要：
Based on the data of four seasonal investigations in the East China Sea （23°30′～33°N、118°30′～128°E） from 1997 to 2000, the environmental adaptation and ecotype of pelagic Polyehaeta in the East China Sea were discussed by applying the yield density model. It is concluded that among the pelagic Polyehaeta species, Pelagobis longicirrata, Tomopteris elegans, Tomopteris duccii, Lepidonotus squamatus and Lygdamis nesiotes were eurythermic species since they distributed in waters with totally different temperatures. These species were not sensitive to temperature change and no clearly optimal temperatures were found. With wide salinity adaptation, Tomopteris elegans was also euryhalinous species. Tomopteris pacifica was identified as oceanic tropical water species because of its high optimal temperature and optimal salinity （ near to 34）. Normally, it distributed in warm current water and its high abundance was a good indicator of warm current. Prionospio malmgreni was a coastal eurythermie specie and the other species were all offshore subtropical water species. In general, Polychaeta were mainly characterized by warm water, but still consisted of some eurythermic species. Fig 2, Tab 3, Ref 20
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