The effect of water temperature change on the rate of embryos and alevin development and the upper and lower limits of lethal temperature for hatching have been defined for dace (Leuciscus brandti) stocks. Incubation temperatures of 10℃ and 18℃ produced the best survival rates of eggs and alevins for dace stocks. The embryos stood with a temperature between 7℃ and 27℃, nearly 100% mortality occurred at 27℃ or higher and below 7℃. Effect of temperature on embryos was distinct at different development stages,...