Abstract:Based on the data from bottom trawl surveys in June, August，and October， 2006, the structure and distribution of macroinvertebrate resources in the Changjiang River estuary and its adjacent waters were analyzed. Totally 49 species of macroinvertebrate were caught, belonging to 2 classes, 5 orders, 25 families, and 37 genus. Crabs accounted for 58.20% in biomass, and shrimps accounted for 92.41% in individual number. Biomass distribution of macroinvertebrate differed by survey time. The relationship was not significant between the density distribution and single environmental factor, such as water temperature, salinity, water depth, pH, dissolved oxygen etc. Relatively, water temperature and salinity have more influence on the density distribution of macroinvertebrate than other environmental factors.
