At the water temperature of 22 -24 ℃ and pH around 7. 0, the growth and development of larva, juvenile and young fish of Mystus sp. were observed. The results showed that development of this species could be divided into four phases, including pre-larva (from hatching to the 5th day), post-larva (the 6th day to the 10th day) , juvenile (the 11th to the 20th day) and young fish (after the 20th day) respectively. The first hatching larvae were only 5. 12 mm long with a yolk-sac of 1. 63 mm . The larvae began to eat on the 3rd day and yolk-sacs were fully assimilated on the 5th day after hatching. The exterior organs developed mainly in the stage of late-stage larva and the largest inital feeding rate of larvae was 84. 0% which appeared on the 6th day and the point-of-no-retum was on the 8th day after hatching. From then, the unfed larvae entered into the stage of PNR and most died on the 11 th day.%在水温22～24℃,pH7.0左右的人工培育条件下,对密斯特黄彩鲶(Mystus sp.)仔、稚、幼鱼的形态特征和生长发育进行了观察与研究.密斯特黄彩鲶的鱼苗发育分为卵黄囊期仔鱼期(初孵至第5天)、晚期仔鱼期(第6～10天)、稚鱼期(第11 ～20天)和幼鱼期(第20天以后).初孵仔鱼平均全长5.12 mm,卵黄囊体积1.63 mm3；仔鱼第3天开始摄食,第5天卵黄囊被完全吸收,鱼苗主要外部器官主要集中在晚期仔鱼阶期和稚鱼期内形成.仔鱼在饥饿状态下最高初次摄食率出现在出膜后第6天,为84.0％,其饥饿的不可逆点则为出膜后第8天,第8天以后即进入不可逆PNR期,至第11天绝大部分饥饿仔鱼死亡.
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