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2010年对长江下游典型淡水池塘内的鱼类、甲壳类和贝类等水生动物多样性进行了研究,共采集鱼类16种,总数量达3 668尾、总生物量达27.3 kg,草虾851尾,总生物量1 379 g,同时还采集到河蚌、蟾蜍和河蟹等种类。研究发现,水深、面积较大的池塘能承载较高的生物资源量,具有较高的鱼类密度和生物量,草虾、河蟹、河蚌和蟾蜍等种类密度和生物量也较高。水生植物覆盖度100%的池塘适合鱼类、底栖动物等生物栖息,密度和生物量较高,但不适合河蚌的栖息分布。研究表明:长江下游奉贤地区的池塘具有较高的水生动物多样性,随着池塘水深和水生植物覆盖度的增加,水生动物的多样性也随之增加,但水生植物明显限制了掘洞种类河蚌、龙虾的栖息分布。
In 2010, the diversity of aquatic animals such as fish, crustaceans and shellfish in the typical freshwater ponds in the lower reaches of the Yangtze River were studied. Totally 16 species of fish were collected, with a total number of 3 668 and a total biomass of 27.3 kg. 851 tail, the total biomass of 1 379 g, also collected mussels, toads and crabs and other species. The study found that ponds with larger depth and larger area can carry higher biological resources and have higher fish density and biomass, and higher density and biomass of shrimp, crab, mussel and toad. Ponds with 100% coverage of aquatic plants are suitable for habitat, density and biomass of fish, zoobenthos and other organisms, but not suitable for habitat distribution of mussels. The results show that the ponds in Fengxian area of the lower reaches of the Yangtze River have a high diversity of aquatic animals. With the increase of pond depth and the coverage of aquatic plants, the diversity of aquatic animals also increases. However, aquatic plants obviously limit the types of tunneling Mussels, lobster habitat distribution.