[ Objective ] In order to reveal the relationship between body weight, length and age in the period of post-embryonic development of Onychodactylus fischeri, the relationship between oxygen consumption rate and body weight with oxygen consumption rate in different developmental stages. [Method] We observed 139 Onychodactylus fischeri in the period of post-embryonic development, measured their body weight and body length to conduct the clustering analysis by the way of using mathematical statistics; then we determined the oxygen consumption rate of larval , subadult and adult Onychodactylus fischeri in the resting state with the enclosed energy metabolism analyzer. [ Result ] The results showed that the average body weight and length were both positively correlated to age; In resting state, the adult Onychodactylus fischeri had the lowest oxygen consumption rate, whereas the subadult had the highest oxygen consumption rate, and negatively correlated to the body weight. [Conclusion ] The growth and oxygen consumption rate of the Onychodactylus fischeri in the period of post-embryonic development shows the characteristics of the cold water streams animals.%[目的]揭示爪鲵(Onychodactylus fischeri)胚后生长发育过程中体重、体长与年龄的关系,探讨不同发育阶段的耗氧率及体重与耗氧率的关系.[方法]对139尾爪鲵的胚后发育进行观察,测量其体重、体长,运用数理统计法进行聚类分析；应用封闭式能量代谢仪测定静息状态下幼体、亚成体、成体爪鲵的耗氧率.[结果]在一定范围内,爪鲵的体长、体重与年龄,体重与体长均呈正向指数相关,且相关性达显著水平;在静息状态下,亚成体爪鲵的耗氧率最高,成体最低,而且耗氧率与体重呈负指数相关,相关性达显著水平.[结论]爪鲵生长与耗氧率的胚后发育表现出冷水溪流型动物的特点.
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