摘要
以人工养殖的性成熟光唇鱼为亲鱼,通过人工授精方法获得受精卵,在室内流水育苗池中人工孵化,观察胚胎发育过程.结果表明,光唇鱼卵子直径1.84～2.14mm,金黄色,沉性,具粘性,卵子受精后吸水膨胀,直径达2.32～2.54mm;光唇鱼的胚胎发育过程经历了胚盘形成、卵裂、囊胚、原肠胚、神经胚、器官分化等发育阶段.在水温25±1℃条件下孵化,从受精到孵化历时42 h53min.初孵仔鱼全长6.5±0.2mm,卵黄囊前部为膨大的球形,后部为均匀的棒状.光唇鱼胚胎发育过程眼囊和嗅板原基几乎同时出现,在尾鳍出现时,眼晶体几乎同时形成.
With sexually matured and artificial breeding,Acrossocheilusfasciatus as parent fish, this paper adopted the way of artificial insemination to obtain fertilized eggs. Fertilized eggs were incubated in the micro - flow water poor and the process of embryonic development was observed. The result shows that the eggs were 1.84 - 2. 14 mm in diameter, sinkable, sticky and golden yellow. The diameter of the fertilized eggs expanded to 2.32 - 2.54 mm after hydrating. The process of embryonic development in Acrossocheilusfasciatus underwent the following six stages ： blastoderm formation, cleavage, blastula, gastrula, neurula, and organ differentiation. When water tempera- ture reaches （25 ± 1 ） ℃ ,42 h 53 min were needed to hatch the embryos. The newly hatched larvae were 6.5 ± 0.2 mm in length. The fore part of yolk sac expanded into a spherical shape and the hind part looked like a bar. In the process of embryonic development, their optic vesicle and olfactory placode, caudal fin and forrmation of lens appeared almost simultaneously.
出处
《绍兴文理学院学报》
2010年第9期44-48,共5页
Journal of Shaoxing University
基金
绍兴市科学技术局资助项目(2006A32010)
关键词
光唇鱼
胚胎发育
鲤科
Acrossocheilus fasciatus
embryonic development
cypriniformes
