关键词: 崇西湿地, 潮滩鱼类, 种类组成, 多样性, 潮汐

Abstract:

 Based on surveys with tide nets in the bare and marsh flat in Chongxi wetland in Changjiang estuary in winter of 2006, the species composition, biodiversity and related environmental factors of the intertidal fishes were analyzed. The intertidal fishes are almost composed of the fresh water and smallsized fishes, consisting of 23 species, 7 families, 20 genera. The most dominant specie is Hemiculter bleeleri both in the two nets. Although the fish abundance in the tide net in bare flat is higher than that in marsh flat, the species composition of the fishes in two nets has some similarity. In a tide cycle, the D,Ｈ′ and J 's indexes have a larger range and the values in low tides are lower than that of the other tides. The species and number of fish at daytime tide are slightly higher than that of night tide, but there is no significant correlation between day and night tides. Temperature and tide size influenced greatly the intertidal fish's abundance. In addition, the status of weather is also an important factor for intertidal fishes. It is concluded that the species composition of intertidal fish is comprehensively influenced by environmental factors.

Key words: Chongxi wetland, intertidal fish, species composition, biodiversity, tide