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观察了珠江斑鳠3批次受精卵的胚胎发育,描述及记录了胚胎发育各期的形态特征及所需时间。斑鳠的成熟卵子呈圆形,黄色,卵子直径为3.1~3.8 mm,吸水后最大卵径为4.0~4.2 mm,受精卵黏性很小。珠江斑鳠胚胎发育与其他硬骨鱼类基本相似,属于盘状卵裂。在水温(27.5±0.5)℃时,受精后约1 h 10 min进入胚盘形成期,受精2 h 15 min后进入卵裂期,受精后7 h 50 min,进入囊胚期,再经约13 h 45 min进入原肠期,受精后21 h15 min,胚孔封闭,当受精39 h 5 min后,心脏开始出现搏动,受精后55 h,仔鱼开始孵出。
The embryos development of 3 batches of zebrafish eggs were observed and the morphological characteristics and the time required for embryo development were described and recorded. Mature eggs are round, cantharidin, egg diameter of 3.1 to 3.8 mm, the maximum diameter of 4.0 to 4.2 mm after water absorption, fertilized egg viscosity is very small. Pearl River cantharidin embryonic development and other bony fish are basically similar, belonging to disc-shaped cleavage. In the water temperature (27.5 ± 0.5) ℃, about 1 h 10 min after fertilization into the blastodermal formation period, 2 h after fertilization 15 min into the cleavage stage, 7 h after fertilization 50 min, into the blastocyst stage, and then by about 13 h 45 min into the gastrula stage, 21 h15 min after fertilization, embryo hole closed, 39 h after fertilization 5 min, the heart began to beat, 55 h after fertilization, larvae hatch.