[Fish assembles in the coastal water of Lüsi fishing ground during spring and summer]

Based on data from bottom trawl surveys during spring and summer of 2010, the species composition and community structure of fish community in Lüsi fishing ground were investigated and compared with those at different latitudes. A total of 21 were identified in spring and 28 identified in summer. In spring, it was mainly composed of warm-temperate fish (9 species), accounting for 45.2% and 72.9% in the individual density and biomass density, respectively. Warm-temperate species Larimichthys polyactis, Cynoglossus joyneri and Cynoglossus semilaevis were dominant in spring. In summer, warm water species appeared in large numbers by 21, accounting for 75.2% and 71.7% in the individual density and biomass density, respectively. Collichthys lucidus and Coilia mystus were the predominant species in summer. One way-ANOVA indicated that the temperature and salinity between spring and summer in Lüsi fishing ground were significantly different, which resulted in the succession of fish community, i. e. the gradual decrease of the warm-temperate, neritic and nearshore species and the concomitant gradual increase of warm-water and estuarine species.