Jingjiang section of the Yangtze River, which is an important area for fishery resource conservation and reproduction of anchovy, is located at the connected region of lower reaches and estuary of Yangtze River.In 2002, Ministry of Agriculture of the People's Republic of China decided to carry out fishing ban in Yangtze River.Fishing boats would not be allowed to fish Coilia nasus in Yangtze River unless they have special fishing license during the period of spring closed fishing season.The fishing season of anchovy in Jiangsu section is approximately divided by the the Jiangyin Yangtze River Highway Bridge.We monitored daily variation in C.nasus catches based on log data of anchovy from 16 fishing boats in Jingjiang section of the Yangtze River from February to May in 2008, 2009, 2012 and 2013, and analyzed temporal and spatial variations in C.nasus catch as they relate to environmental factors.Results showed that the daily catch number (N_B) and daily catches weight per boat (W_B) ranged from 0 to 351 ind./d and from 0 to 39.5 kg/d, with an average of (21±38) ind./d and (2.0±4.1) kg/d, respectively.Meanwhile, total annual catch (N_t)and total annual catch (W_t) per boat ranged from 130 to 3952 ind.and from 10.9 to 435.6 kg, with a mean of (890±929) ind.and (92.3±91.1) kg in fishing season, respectively.N_B and N_t showed the similar annual variation trend, the maximal peak N_B and N_t occured in 2013, and other years' N_B and N_t maintained at relatively low level.However, annual variation trend of catch weight was different from that of catch number.W_B and W_t continued to decline from 2008 to 2012, and then a significant rise was found in 2013.As fishing season progressed, the N_B and W_B increased markedly.N_B and W_B were very low in February and March, then increased to (23.0±31.3) ind./d and (2.4±3.5) kg/d in April, and reached a maximum in May, Which were (78.0±81.0) ind./d and (7.7±9.1) kg/d, respectively.The ANOVA analysis showed that N_B and W_B in west water area of Jiangyin Yangtze River Bridge were significantly higher than those in east water area (P<0.001).N_B and W_B in west water area were 2.5 and 2.7 times those in east water area.Highly significant correlations were obtained between W_B and daily water temperature and between W_B and the maximum daily water level (P<0.05).The results suggested that the rise of water temperature off Yangtze River Estuary may be an important environmental factor, which can induce C.nasus to start migration.Further, the peak W_B appeared near the highest water level, probably because of the fixed net filtering more river water.