Abstract: Samples of Coilia nasus taihuensis were collected with multi-mesh gill net from five typical waters including Nanjing section of Yangtze River, Gaoyou Lake, Hongze Lake, Luoma Lake and Jiangsu section of Huaihe River from September to November in 2017. By identifying the contents of stomach and determining the feeding rate, stomach fullness index and Ivlev’s selectivity index, the feeding characteristics ofCoilia nasus taihuensis in different waters were compared. The results showed that Coilia nasus taihuensis in different waters were all zooplankton-feeding, mainly feeding on cladocera and copepods, occasionally on rotifers, small fish, and shrimp. There was no significant difference in feeding intensity and Ivlev’s selectivity index among different waters, but with significant difference in food composition. The Shannon index of diet composition forCoilia nasus taihuensis in Hongze Lake was the highest, followed by Gaoyou Lake, while the Yangtze River was the lowest. Copepods dominated the diet of Scorpion in the Yangtze River, Hongze Lake and Luoma Lake, while Cladocera dominated in the Gaoyou Lake. For copepods, the predominant species were Cyclops (quantity percentage of 29.2%-70.1%) in the Yangtze River, Gaoyou Lake, and Hongze Lake, Acanthocyclops (45.4%) in Luoma Lake, and Cyclops and Thermocyclops (18.6-18.9%) in Huaihe River. Bosmina were the dominant species of cladocera in Gaoyou Lake, Hongze Lake, Luoma Lake, and Huaihe River, with the percentage ranging from 76.9% to 100.0%. Daphnia were the dominant species in Yangtze River (81.5%). Results of cluster analysis showed that Coilia nasus taihuensis from five different waters could be classified into three populations according to their feeding characteristics: Yangtze River population, Hongze Lake and Gaoyou Lake population, and Huaihe and Luoma Lake population.

Key words: light use efficiency., photosynthesis, successive rotation, poplar, Chaetomium globosmn ND35