为探讨天津汉沽鲤鱼门潮间带经济贝类资源的变化特征, 2012~2014 年作者对该滩涂经济贝类开展资源调查, 并与 2008 年的调查结果进行对比分析.结果表明: 2012~2014 年经济贝类种数分别为 9种、10 种、10 种, 高于 2008 年的 7 种; 鲤鱼门滩涂经济贝类主要分布于中潮区, 2012~2014 年中潮区经济贝类资源量分别为 1 082.8、1 183.9 和 1 339.8g/m2, 高于 2008 年的 293.5 g/m2; 2012~2014 年优势种为菲律宾蛤( Ruditapes philippinarum)仔, 优势度 90%以上, 2008 年优势种为四角蛤蜊( Mactra vene-riformis); 近年来菲律宾蛤仔大量出现, 与邻近海域的大规模增殖放流活动密切相关.%Based on the analysis of economic shellfish samples collected in the intertidal zone along Liyumen coast, Tianjin in 2008 and the data obtained from the same sampling area during 2012–2014, the features of the changes in economic shellfish were derived.The results showed that the economic shellfish species components in this area were 9, 10, and 10 in the year 2012—2014, respectively, exceeding 7 species in 2008. Economic shellfish distrib-uted mainly in middle intertidal zone with the average biomass of 1082.8, 1183.9 and 1339.8, respectively, exceeding 293.5 g/m2 in 2008. The dominant species was Manila clam Ruditapes philippinarum in the year 2012–2014 with the dominance index above 90%, but it was Mactra veneriformis in 2008. A large number of shell-fish appeared in the Manila clam in recent years, which is closely related to the large scale breeding and releasing of the Manila clam in the vicinity sea areas in recent years.
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