缢蛏对对虾池浮游生物群落结构的影响

The Impact of Constricted Tagelus Polycultured in Shrimp Ponds on the Structure of Plankton Communities

１９９６年５～９月在山东省海阳黄海水产集团公司养虾场，结合缢蛏和中国对虾混养实验，探讨了缢蛏对浮游生物群落结构的影响。结果表明：缢蛏主要滤食２～５μｍ的无鞭毛藻类，从而使隐藻等鞭毛藻类成为浮游植物优势类群；缢蛏滤食原生动物、轮虫等小型浮游动物和大型浮游动物的幼体，并且通过食物竞争来影响大型浮游动物，使浮游动物群落以捕食性和繁殖力强的剑水蚤及其无节幼体为主要成分。

This paper deals with the impact of constricted tagelus polycultured with shrimp on the structure of plankon communities. It was conducted on the shrimp farm belonging to Huanghai Grouped Fishery Corporation, Haiyang, Shandong Province from May to Sep., 1996 with the enclosure experimental method. The results suggest that constricted tagelus prefer 2￣5μm monflagellated algae as food and made flagellated algae such as Cryptomonas spp. dominate in phytoplankton community. Constricted tagelus may filter small sized zooplankton like protozoans and rotifers and also affect the big sized filter feeding ones by food competition and filtering their larvals. As a result, the nonfilter feeding cyclopiod copepods become dominated in the zooplankton community.