The effect of temperature on the life history characteristics of amictic females (AF), unfertilized mictic females (UMF) and fertilized mictic females (FMF) in Brachionus calyciflorus was studied with replicated individual cultures at 20C+, 25C+ and 30C+, and with algae Scenedesmu obliquus for their food. There were highly significant effects of both temperature and female type, independently and interactively, on the duration of juvenile and post-re-production periods, and the number of eggs produced by the rotifer per life cycle. Among all the temperature-female type combinations, all the juvenile periods of FMF, and the post-reproduction periods of UMF and FMF at 20C+, were the longest, and the number of eggs produced by an UMF at 30C+ was the highest. There were highly significant ef-fects of both temperature and female type on the duration of the reproduction period, but no clear correlation was ob-served between temperature and female type. The reproduction period of AF was longer than that of UMF and FMF. Only temperature influenced significantly the mean life-span of the three types of females. The duration of juvenile, reproduction and post-reproeuction periods as well as the life-span of the three types of females were all reduced very significantly with rise of tempersture, but the rates of reduction varied with female type. Among the three types of fe-males, the number of eggs producted per life cycle by an UMF was the highest, and that-of a FMF was the lowest. A significant relationship between the number of eggs produced per life cycle and temperature was observed only in the UMF.