To identify temporal-spatial distribution of fish resources in Zhejiang coastal and estuary regions,based on the data from bottom trawl fishery resources in Taizhou Bay in April and October 2010,The temporal and spatial distribution and the influence of dominant species,temperature and salinity,water depth and other factors on the amount and distribution of fish resources were analyzed.The result showed that the change trends of individual densities and weight densities were consistent,In April,both of individual densities and weight densities were higher than those in October in terms of seasonal distribution.In the spatial distribution respect,the fish resources densities in the north studied area were obviously higher than those in the south in April,however,it was obviously opposite to October.According to stepwise regression analysis of fish resource density with dominant species and hydrological factors,in two seasons,the variation of resource density had significant correlation with all the dominant species,Harpodon nehereus is the most dominant species because of its highest contribution rate to the weight densities and Individual densities.Meanwhile,the fish resource density had significant correlation with surface temperature(P_W=0.001,P_N=0.009),and depth had insignificant correlations with resource density(P_w=0.067,P_N=0.051).The area whose depth was less than 20 m had higher amount of fish resources density in Spring,while the high values of density at greater than 20 m depth in Autumn.This research showed that the fish resources had a significant seasonal alteration and spatial variation.Bottom water temperature was the most important factor that affected variations in the fish resources in the Taizhou Bay.