中国大鲵胚胎发育形态特性比较研究

通过观察在全人工繁育条件下大鲵的胚胎发育及器官的形成过程,对比仿天然生态养殖的大鲵胚胎发育过程,对大鲵从受精卵到孵化为幼苗出膜进行了连续系统的形态学观察.结果发现:人工繁育的大鲵在胚胎发育至神经胚期和器官形成期,有明显的"神经沟出现"、"视泡形成"和"心脏跳动"的特征,因而在传统分期的基础上增加了"神经沟期"、"视泡形成期"和"心脏跳动期",从而将大鲵的胚胎发育过程细化为23个时期;虽然同种大鲵的人工繁育和仿生态养殖方式绝大部分发育时期的外形特征基本相同,但在卵裂期和神经胚期依旧存在差异;并利用人工繁育技术,提高其孵化率,为进一步研究大鲵的人工繁育提供理论基础和实验材料.

A developmental morphology characteristic comparative study of Andrias davidianus embryos development

This study through the observation under the condition of total artificial breeding of giant salamander embryo development and the formation process of organs, the contrast of copy is natural the salamander embryo developmental process of ecological breeding, the salamander from fertilized egg to hatch for seedlings out membrane on the morphology observation of continuous system. Results： artificial breeding of the strain to its embryonic stage in embryonic development and organ formation, there are obvious ＂nerve ditch＂, ＂optic vesicle formation＂ and ＂heart beat＂ characteristics, and on the basis of the traditional stage increased ＂neural groove period＂, ＂optic vesicle formation＂ and ＂heart beat＂ period, and the appearance of embryonic development process is divided into 23 times; Although the same strain of artificial breeding and imitated ecological breeding way most basic same, appearance features of development but in cleavage stage and neural embryo stage still exist differences; And by using artificial breeding technology, improve its hatching rate, hatching rate. Providing theoretical basis for further study on the artificial breeding of giant salamander and experimental materials.