以低温催产药物进行人工催产、授精 ,获得的杂交鲶受精卵平均卵径 1.6 4mm ,卵粒质量 3.5～ 3.6mg。利用 0 .3%胰蛋白酶对受精卵脱膜 ,解剖镜下连续观察 ,并将其分为胚盘期、卵裂期、囊胚期、原肠期、神经胚期、器官形成期和出膜期七个阶段 ,对所需时间和发育各时期形态特征进行了详细描述。在 18.2～ 19.7℃水温条件下 ,孵化积温为 10 35℃·h ,经 5 1h2 6min孵化出苗。 The cryogenic oxytocin was artificially induced and fertilized, and the average ovum size of the fertilized eggs of the hybrid catfish obtained was 1.6 4 mm and the mass of the oocysts 3.5 to 3.6 mg. The zygotes were removed by 0.3% trypsin and dissected continuously under a dissecting microscope and divided into blastula stage, cleavage stage, blastula stage, gastrula stage, neuroblastoma stage, organ formation stage Period of seven stages, the required time and the morphological characteristics of various stages of development were described in detail. Under the water temperature of 18.2-19.7 ℃, the incubation temperature was 10 35 ℃ · h, and the seedlings were incubated at 5 1 h 2 6min.