虾池浮游植物群落特征及其与虾病的关系

１９９１年６月至９月对大连地区３个虾场养殖的中国对虾及虾池浮游植物群落进行了调查，研究了虾池浮植物群落的组成结构、数量分布、演替特征及其与虾病之间的关系。结果表明，虾池浮游植物群落组成和数量分布具有较大的突发性；优势种单一，多为赤潮生物种类，有些种类原本为底栖生物；群落演替时间短，变化快；养殖对虾发病症状为红腿和黄鳃，严重出现死亡。浮游植物的总量尤其是赤潮种类的总量与对虾的发病程度有正相关性；群

THE CHARACTERISTICS OF PHYTOPLANKTON COMMUNITY IN PRAWN POND AND THE RELATIOXSHIPS WITH SHRIMP DISEASE

The characterstics of phytoplankton community in prawn pond and the coastal water in Dalian area were studied here. The result shows that the structure of phytoplankton communities including a number of benthic populations were very different from that in ocean. The kinds of and the numbers of algae cells in prawn pond changed suddenly comparing with that in ocean. Many dominant species were pollution--tolerant species and toxogenic or harmful red tide organisms. Succession times of the dominant species were short and changed rapidly. There was a negative correlation between the diversity index of phytoplankton communities and a postive correlation. between the kinds and numbers of the phytoplankton communities and the state of prawn growth.