Abstract:Seasonal species composition of crustacean was analyzed based on the data from the fishery resource monitoring investigation carried out in spring (April), summer (June), autumn (September) and winter (December) of 2004 in the East China Sea and the Yellow Sea. A total of 33 species of shrimp, 12 species of crab and 3 species of stomatopod were collected. The dominant species in the East China Sea and the Yellow Sea was identified as: Solenocera melantho, Parapenaeus fissuroides, Trachypenaeus curvirostris, Metapenaeopsis longirostris, Solenocera koelbeli, Crangon hakodatei, Plesionika izumiae, Solenocera alticarinata, Charybdis bimaculata, Portunus trituberculatus and Oratosquilla oratoria. Among theses, S. melantho, P. fissuroides and T. curvirostris were the main dominant species in the survey area. The biodiversity 〖JP2〗of crustacean in the East China Sea and the Yellow Sea was indicated by 3 indices: Margalef index (D), Shannon Wienner index (H') and Pielou's evenness index (J'). D and H' trended to decrease from the northern to the southern area in spring, increased from the north to the south in summer and autumn, and showed high value in the north of the East China Sea (ECSN) and low value in the south Yellow Sea (YSS) and the middle of the East China Sea (ECSM) in spring. J' showed little difference among seasons in all areas. The community of the ECSM showed a relative stabilization, while the community characteristics of ECSN varied with season.
