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设定基温（23℃），研究了温度骤变（23℃→35℃、37℃、39℃→23℃）条件下不同的处理时间对稀有鲫（ Gobiocypris rarus）不同发育阶段的胚胎和仔鱼的影响，以期为评估温排水对鱼类的影响提供基础资料。结果表明，稀有鲫不同发育阶段的胚胎和仔鱼均能耐受温度骤变（23℃→35℃→23℃），与对照组（23℃）没有产生显著性差异；但当温度骤变为（23℃→37℃、39℃→23℃）时，随着骤变温度的升高以及处理时间的延长，不同发育阶段的胚胎和仔鱼畸死率升高，耐受能力表现出较大差异。其中，眼黑期＞肌肉效应期＞胚孔封闭期；混合营养期＞外源性营养期＞内源性营养期。“,”On the condition of basic temperature (23℃), the effect of abrupt temperature change and different processing time on embryos with different developmental stages and larvae of Gobiocypris rarus were studied .The purpose of this study was to provide basic data for evaluating the effect of thermal discharge into water on fish .The results showed that all the embryos and larvaes could withstand abrupt temperature change from 23 ℃to 35℃and then to 23 ℃, and no significant difference were observed compared with control group (raised in 23℃all the time).However, when the abrupt tempera-ture change was 23℃to 37 ℃or 39℃and then to 23 ℃, the tolerance of embryos in different developmental stages and larvae were dependent on the temperature rise and processing time , the higher abrupt temperature change and longer pro-cessing time, the higher deformity-mortality rate.Different developmental stages had different tolerance .Among them, embryos in melanoid eyes stage were stronger than in muscular contraction stage , and those in closure of blastopore stage were the weakest .The tolerances in mixed feeding stage , exogenous feeding stage and endogenous feeding stage decreased in order.