he effects of temperature on the population of A. sinca have been studied in the watersof the Yanchi Lake, Shanxi. It was found that the adaptive temperature for its developmentranged from 11─38℃. The threshold temperature of development(TD)and the effective ac- cumulative temperatureTA) for hatching were 9. 07℃ and 0. 921±0.979℃·d,respectivi-ly. The TD and TA for the larva were 11.0℃ and 205. 26±24.1℃·d,respectively,and theaverage TA for a whole generation was 458.4±36.6℃·d. Using the methods of the life...